When covering the outside with corrugated plastic or twin wall polycarbonate, you retain the option to add a layer (or 2) of plastic film to the inside. This can allow the plastic to last much longer since it is out of the weather - especially if the outside layer has UV coating. Did you know that many of the political campaign signs that will be discarded in November allow sufficient light through for a greenhouse and have decent insulation value. Combine that with some free pallets and you can make a free gambrel style greenhouse 9.5ft tall by 11ft wide by any length. You can fill the pallet studs on the north side with free cardboard and cover the inside with another layer of signs (to keep the cardboard relatively dry) to get ~R-20 insulation. The clear PET from 2-liter bottles can be used for little windows. If you have a few dollars to budget, then cover the north wall with either Mylar emergency blankets or a reflective insulation blanket to reflect some light back. Rather than using raised beds, dig sunken walkways to tap into the ground's stored energy and keep sufficient water storage for thermal mass to help balance the night/day temperature swings. I painted my black watering pitchers white on 1 side and point the black side toward the sun in winter and the white side toward the sun in summer (when I remember to)
@@ef3345 Twin wall polycarbonate is a durable strong fantastic material with about an R2 insulation factor - very similar to glass but less breakage possibility. it tends to be be transplant not transparent but that's all you need to grow plants! Great choice
I built my first 11' x 14' poly tunnel several years ago using what I already had - a roll of 6 mil "visqueen" from Lowes. The skin lasted exactly 2 years, and it was great. I moved it and rebuilt it this spring and used the same material again for the same reason - it's what I had. The benefits of having any kind of greenhouse are so great that you really shouldn't put it off because you are waiting to afford something better.
I bought a prefab greenhouse with single wall polycarbonate that was too hot in the summer and too cold in the winter (SE Montana). I had to move it on the property after two seasons that required taking it apart. I took advantage of the move to put it on a block foundation, add power, lights, and ventilation, and most importantly, covered the greenhouse with Solexx twin wall. I put the original single wall polycarbonate back on OVER the Solexx and secured it all to the wooden frame, much like the greenhouse at 08:30 in this video. I mostly use the 8x16 greenhouse for starting seeds for the main garden season, and growing greens like lettuce, kale, chard and spinach under domes for winter salads with supplemental heat from heat mats. I also. Have close to 100 gallons of water in 5-gallon pails and milk jugs for thermal mass. Today is sunny and with the outside temperature of 25 degrees, the inside temperature is 74 degrees at 1:30 in the afternoon. The low last night was 13, and the low inside near knee level was about 27 degrees ( I was tracking the air temp on the water jugs) The peppers and the eggplants that I held over from last season as an experiment, that were sitting on the heat mats are OK, but a couple that were not on heat mats got frosted, though if I had remembered to cover them, they would have been just fine. Again, looking at the greenhouse pictured in the video at 08:30, my door faces east the right hand side faces north. My vertical sides on the north side are insulated with 1” foil faced bead board, and the whole north roof is faced with aluminized Mylar bubble sheet. I am still working on improving the systems.
2 years ago I used the corrugated panels on the outside of a framed greenhouse. Sealing all seams with silicone. The first summer day with low humidity, I used insulating 3 mil clear plastic and stapled to the inside of the frame. with the clear tape to seal all edges. I used a clear silicon exterior caulking adhesive and staples to attach. This seems to be working well. The air gap is the width of the 2x4 I have no idea what the R value is. I think because there is no wind stress on the plastic, it still looks brand new. Because I waited for the low humidity, I am not having any discoloration between. This is only on the sides, as I use the ends for ventilation. I am still working on having both on the ends. Hope this helps. BTW it was tedious to build, as I matched the hills and valleys carefully on the ends, so they could be completely sealed with the silicone and not allow moisture between the layers.
Did you think using foam pipe installation for the ends so that foam material will form with the shape of the panels there by no longer need to match "hills and valleys" would work?
@@leeames9063 Foam pipe insulation is an open cell foam, so I think you may have trouble with it fogging up as it will allow humidity to get in. Just my opinion.
nice, unbiased.....I use a double poly stretched over an aluminum frame.....the poly is easily replaced.I got it free, as it needed some work...some torn panels, some bent aluminum, but it has been functioning now for 2 years. Its a 10x12.
How about using the poly rolls under the corrugated panels to add extra insulation since this panels already have a gap due to their shape. I wonder if this will prevent much light from coming through?
My uncle used the corrugated panels. He used them for a 5x5 greenhouse and doubled the corrugated panels by making a 3/4” gap between the panels. It was nice and warm and I’m considering doing the same at our house. P.S. at our previous home we made a 2x3 greenhouse with used windows that we got from the habitat for humanity restore store.
With corrigated plastic on the outside could we insulate it with bubble wrap on the inside, or even sandwich bubble wrap between two sheets of corrigated plastic. In Australia I'm sure I've seen uv protect bubble wrap sold as a posible green house covering.
FYI, My father built a greenhouse using corrugated semi-clear (tinted, summer temperature was too hot) corragated plastic sheets. We fastened the sheets to the roof timbers using corrugated molding strips like these from Lowes - Tuftex Wood Solid Roof Panel Closure Strip. Over the years only had sheets loosen up a few times. Installation wasn't too bad.
i built a dyi 8x20 greenhouse .I bought a ''used'' 30' clear pool cover , its like buble wrap and Its strong. I also used , ''used'' patio doors as the window around the sides. Last summer and into January the plants were great. How long it will last here in Canada is yet to be determind.
I was even thinking about using stretch wrap. I've seen pallets sitting outside covered in this stuff and it lasts years. It clings to itself and you can make several layers wrapped around whatever frame you have.
If the structure isn't too big, it could be a good cold hoop house. The plastic is generally only used in the winter and cut off in the summer. Maybe it can last longer, I know that stuff is strong in multiple layers.
I use a corrugated Lexan in a Greca pattern from Amerilux. It is called soft lite and disperses the light so you do not have any shadows and it penetrates the canopy at multiple angles so you obtain much more growth lower on the plant. I used it on our first greenhouse and am now installing it on our second greenhouse which we are building.
@@SimpleTek I will say, I don’t grow much of anything in my greenhouse. I use it to keep tropical species of turtles and tortoises in through the winter. Same principles apply and channels like yours are where I send other turtle folks to learn.
I have 2 greenhouses covered with a single layer of poly. In Tn i can grow lots of cool weather crops in the fall, winter and spring, without heat. If it makes it to next April it will be on 8 years. If not i will replace it. I bought the poly in 2013 and bought a long enough roll to cover the first one twice for about $200.00. I bought it from Amish in South West Ky in Elkton, KY. They have a high volume of sells so they can sell cheaper than some people.
I really like your channel and have learned a lot. I live in Michigan and am looking to build a greenhouse that I can grow all year round. I will be using a hydroponic system and wanted to know if you have any design resources for the greenhouse.
I used corrugated panels clear and for the top I used tinted panels. It’s too hot inside 115-120 now I’m trying to cool it down. I just bought shade cloth for the top, I’ll see if that works. It’s cooking my plants. South Mississippi
I have a 6' x 20"wide path X 8' long behind my storage SHEAD and Neighbours chain link fence facing south. What construction material would you suggest for a starter greenhouse, for sprouting new plants in spring from the seedlings I started in the Crawl space under grow lights during winter here in southern On, Canada?
Just a thought about air gap with corrugated plastic. What about corrugated plastic on outside and a poly roll sheet on inside of greenhouse to create the air gap.
I used the big box store corrugated panels for a chicken coup. Got clear & smoke panels both for testing. Placed a clear then smoke alternating over sleeping/roost areA. Idea of smoke was to draw warmth from winter sun. Worked very nice n chickens liked it & I was happy, provided winter sun to get girls up n moving n happy. I'd reach in & be quite nice even on 20° days. We get snow & of course would always melt off of smoke colored panels first. After 3-4 years , one day had a hard hail storm. Some hail measure 3/4" in width. The clear panels it punched a few holes in, (not many) & next panel which was smoke received No holes. Both panels were the same thickness and size installed same way. The smoke survived with out holes, but clear not as well. Realize in a green house only clear be used. Just what I learned.
Corrugated roofing panels use ribs at the ends when using as roofing. I wonder if you can use that ribbing to double the corrugated panel to create an air gap for insulation and if it would be worth it.
@@SimpleTek I was thinking that. I recently replaced my chicken coop roof from corrugate plastic to metal. I have some panels, but they're green, not clear. I'm going to experiment with them to check the temperature inside.
What about vinyl. Rolls of 4mm thick are $11 for a roll 44" wide and 18' long from Amazon. I am covering a large cold frame with it right now. 8' long, 5' tall, and 5'5" wide. 2" by 4" framing and 1" by 2" panels covered on both sides with vinyl. 1" redwood strips over the stapled plastic.
Thank you. great information. We live in N.W. Montana and on the side of a mountain getting more snow and colder temps, snow shedding, very short days into the winter but still wanting to grow at least 10-11 months out of the year. So this information is important for use. We are planning and will be building ours this summer 20x40 and unless something changes will be using double wall plastic inflated. Thank you again.
Hi! Hope you are well and love the videos. We are planning to building a greenhouse this summer using 16mm polycarbonate panels. I am aware that we need to tape/seal the top end of the panel but what do we do with the bottom end? Do we tape it with solid tape (same as the top end) or use the air flow tape and end cap that allows moisture to escape the panel? We are hoping to use the greenhouse in the winter months (living in Calgary) but are unsure of how to treat the bottom end of the panel as we want to keep as much R value as we can. Thanks so much in advance for your time!
I was thinking about the same thing. Building a ridged green house with the corrugated plastic on the outside and on the inside secure poly like a vapor barrier. The 2x4s will provide the air gap and as long as you use the little corrugated end caps, it should be fairly airtight.
Thank you for the information! I'm looking at converting a wooden gazebo that needs the roof (shingles and some corrugated panels) replaced anyway. I'll look further into Solexx as well as double layered polycarbonate.
Hi! I live in the caribbean which is basically hot all year round. Which plastic is more durable and is long lasting? Where would you recommend to purchase this material? Your advise would be greatly appreciated.
Try building with two layers of clear corrugated sheets. Build similarly to house leaving air space in between. Where the outside is horizontally hung and the interior is vertically hung it seemed to baffle the cold air. I also used sticky window foam insulation on overlapping edges that I was screwing together on exterior walls.
Imagine the weather in the area like wind storms, hail, etc. would determine what material a person would use. Recycle old windows or use more than one option within budget until afforded then wearability can be monitored like a test to see what would be best. Glass is so beautiful! Did not know there were so many options until now.
I have a question...my husband and I recently built a raised garden bed approx 8 x ten with tall sides to keep animals out, however we live in an area in which we get hail storms, can I use an opaque white tarp over my garden for any extended period? Will my veggies still grow under there if I leave it on for several days? This would be temporary until we have time to turn it into a greenhouse...thank you?
I used corrugated fiber glass panels from Home Depot. Inside the greenhouse I put layer of pool covering from Amazon. Pool covering is cheap because its not though to be used for a greenhouse. Anything for greenhouse is expensive. It's very durable too. There's 4 inch gap between the panels and pool covering since the greenhouse is made with 2×4 lumber.
There are two types of rigid roof panels sold at Home Depot and Lowes, Palruf which you showed in the video, lacks the strength needed to be durable and is known to break under adverse weather conditions, not recommended for use in direct exposure to the elements. The other panel, Suntuf is designed to withstand adverse weather conditions, I used these panels on my Ana White barn style greenhouse in central Maine and have never had a problem with snow loads, etc. The Suntuf is also a UV protected panel and has a transmission rate of 90% in the clear panel. The polyethelene rolls if bought at Home Depot/Lowes is transluscent at best and seems to block the transmission of hig red light, the result are plants are elongated, not a good GH solution. The other option, Home Depot sells the double layered panels which you mentioned, good for non flexible applications. Here in New England home grown green houses are primarily used to extend the growing season and generally not used in the colder months of the year. The greenhouse can allow one to start the growing season well into April and at the other end into October.
we have an old carriage house on our property with our small 9x11 foot greenhouse next to it. We have a plan to demolish both and build a 30x50 foot greenhouse or a 60x35 foot greenhouse, our plan is either traditional or a hoop house on top of a box structure to make it much taller. We also might attempt a barn roof style, our requirements are that it must have a rectangular base, be around 30-60 feet tall, no more than that though (we plan on having palm trees in there so it must be tall, but not so tall it could shade the garden near it.) it must shed snow well, and last a long time. I was thinking glass because our current 9x11 is recycled glass, but ofc that’s too expensive, so then I was thinking polycarbonate, but that’s kind of expensive too right? I really want your opinion, and I don’t think the flimsy plastic wrap poly stuff would work for where I live where it gets down to -30 sometimes and we get 3+ feet of snow.
if you use greenhouse poly, use 6mill or great, UV treated, and DOUBLE AIR INFLATED. that is usually rated for 6 years but double air inflated it'll go ten years. the cost savings is ENORMOUS. as long as it's rated for your climates you'll be fine. I use it and we get -40'
If you want double wall corrugated, use 1”x1” wood spacers between the panels to provide the air gap. That should give triple the strength without making the panels excessively heavy.
What if you used the corrugated plastic on the top side of the lumber and on the inside of the lumber? Whouldnt that be a 3.5 inch air gap for insulation?
I was just at Lowes and the price for a 4x10 sheet is: corrigated plastic $47 and multi-wall pannel polcarbonate is $54. For that alone I am choosing the poly pannel. Thanks for all your info.
Hi there I suggest doubling up corrigated sheets using rolls of self adhesive neoprene which can be bought in a variety of widths and thicknesses. small pieces off the roll could be used as spacers mid sheet and run the roll full width to end seal the doubled sheets
First off, I think I've learned a thing or two watching your videos. Thank you. I am wondering if it is possible to lay fiberglass over a geodesic dome and sand and polish smooth to a close to glass like transparent finish. I would really like to hear your thoughts on the possibilities if it's possible.
Thank you for the kind words! honestly, I have no idea if that would work, I suppose it would but it feels like the amount of work would make it cost prohibitive?
The resin choice is critical with fiberglass. UV transmissibility is often overlooked as good quality spectrum vs UV damage of polymers. Some polymers are immune to UV and that is my choice.
I just had this video pop up in my feed, it’s perfect timing as I’m in the process of deigning an three season 12’x20’ greenhouse, so far I’m leaning towards the corrugated panels 26”x8’ for the roof since we live in a high snow load zone. Im looking at using DURABLE REINFORCED TRANSPARENT PVC PLASTIC TARPAULINS PROTECTIVE COVER: Thick Material, High Temperature Heat-sealed, Firm, Tear-resistant, Durable. Transparency: 99%; Water Resistance Index: 100%; Thickness: About 0.39mm thick. I just have to research it a bit more. Thanks for sharing this video.
A clear teflon coated ( dust/dirt mitigation) outer layer with a light scattering inner layer spaced with an air gap is the best way to get max light in, and keep heat out. What you spend on the panel actually compensates itself by lower electricity costs. Cannabis is known to love bright lights.
With grand Soler minimum coming we will all need to use green house to lengthen in the growing season. A vidio on framing the green house would be interesting. You. Would use the poly panels for the outside and add a airgap and second layer of poly sheet on the inside of the frame where it would last longer.
Thank you for making this. I suggest for your research on corrugated plastic panels and a space between layers, to try experimenting with a combination of drilling matching holes in panels, stacking something like rubber washers for garden-hose connects as spacers in between, and for a pass-thru fastener using an aluminum pop-rivet. Inexpensive and easy. I have a growing/greenhouse project in my mind for the future to address current threats to our society's food security by being tethered to long, complex supply chains spanning multiple continents. A second job the panels can do is be used to recover the distilled water condensate where convenient. Best of Health to you.
@soaringtractor Thanks for the info, since I posted, I've been dreaming about a project to build a human terrarium/edible jungle to hang out in during the Winter days when there's 3-5 feet of snow outside.
Hello what kind of temperature would i get inside my double layered polykarbonat greenhouse house if its +7 Celsius/44 Fahrenheit outside Just wondering, might be a stupid question. Good video:)
Since corrugated planes are so cheap, could it potentially make sense to double layer them for increasing R value? Like by fastening it on the top of the 2x4/2x6 stick frame, then another layer fastened on the bottom side of the 2x4s to get that air gap. Similar to the method used to increase R value of poly with an air gap. Just looked up how much corrugated panels cost, and tractor supply store has a 10 pack of 26”x8’ for $120. For that price I might just try a small build double or triple layer build to start, and see how well it can work in a growing zone of 2. Really don’t like the idea of poly wrap since a windy day could potentially blow a tree branch tearing the wrap.
You can get foam profile inserts for the corrugated sheeting that will allow you to achieve an air gap between two sheets. It is used for draught and vermin proofing, vibration and noise control, air and weather sealing and watertight sealing.
At 8:12 in the video, that is not Solexx. It is a product called SolaWrap, which is a heavy duty UV resistant bubblewrap plastic on a roll. SolaWrap is much more affordable than Solex. It's an option I've considered if I built a greenhouse.
Couldn’t you do a layer of the corrugated panel 1 on the inside of the frame, 1 on the exterior of the frame? It would create and air pocket, you could seal off.
I’m Just now seeing your video for the first time and I to are looking into the carbon poly panels from Home Depot. How did you make out and what did you end up doing with yours? I was thinking it was it possible to double them up using the foam installation product in longer screws. Did you try this?
With double Poly inflated the inner poly lasts a long time, right? Inflate a Poly sheet inside the corrugated panel for diffusion and insulation and I think you have something rigid, lasting and insulating for cheap.
6th choice. Looks like solex but super cheap double layer polypropylene sheet. Naturally UV resistance and warm. Use double walled with corrugated polycarbonate. Leaving a gap at the bottom and a gap at the top. For superior insulation
Hi friend I will be doing 32 large window interior double pane glass for the winter and transforming them to incorporate them into my solarium wrapping around to the farmers porch. Just need to source the glass.
the corregated panels can be made double paneled using silicone ribs between the panels and using rubber gaskets or bracket the end with jchannel just like on eaves on a house.
Additional info : polytunnel/hoophouse polythene can last 10+years if researched. I had some that lasted 15 years before I dismantled the structure. Also, never use corrugated plastic panels in areas of extreme cold or high winds. This stuff is really brittle if hit by flying debris, or flexed in sub-zero temps. The best bang-for-your-buck is the inflated doubled polythene. A high tec example is The Eden Project, Cornwall, UK, where their laviathan greenhouse domes hold rainforests and savanas. Well worth a visit.
i was going to turn my pole barn frame into a green house *(at least temporarily) and I had thought of going with the corrugated panels on the outer frame with a poly sheet stapled to the inner side.. that would get me about 6" of air gap easily relished with a small fan providing a positive pressure.. i think it will keep my green house from getting too hot in the summer and warm in the winter as I live in north FL and that wouldn't take much if I connect my fan to a thermostat I hope to be able to have it self regulating without constant attention. a "smart" greenhouse. Thanks for this video.
Just a thought, many steel buildings have light panels in the roofs to utilize daylight. I'm going to a builder next week to source these panels. They are translucent , not clear.
I built a hybrid using recycled sliding glass doors and Windows with a corrugated plastic roof. I did have to replace the roof after about 7 years because i it wasn't adequately supported and sequered and that caused warping in the heat. It also became very brittle and fractured as I was removing the old panles. The price was great and I figure most of the issues were do to used error.
Ty for all your videos! But in my opinion etfeis the best greenhouse covering. It was used on the Eden project built in the late 90's and early 00's. It is still in use as a covering today. It may be a bit more expensive to get at the start but the long gevity easly compensates for that.
I used corrugated plastic sheets on the out side used staples to secure two layers of poly one the inside. One layer is half the studs. Helps with insulation value and corrugated material blocks damage physical and uv
I do think I need to use the local reg plastic roll , is 4 mm 25x 100 a good deal at 66.00 ? I'll b using steel rebar frame, feels like the steel is making a magnetic effects, any advise before i commit
Im in Manitoba where it's really cold. Is the corrugated panel gonna keep it warm in the winter? And is it easy to make air tight? That looks like it would be difficult!
I'll be honest. I don't know. As I said in the video I just found out about clear corrugated panels. I'm in Manitoba as well!!!!!! So I'm left with the question, does the air gap have to be air tight? With polycarbonate panels the air gaps often aren't closed off, and with double layer air blown poly people have relief valve's so the air is constantly circulating... but the real answer is I don't know and will find out with experimentation! Thank you for the reply and I hope you're enjoying this awesome February weather we're getting right now!
They sell (rather expensive) strips to put under the corrugated panels. Some of them are just porous foam to keep wasps out, but you can get solid ones too... or just squirt in some canned spray foam. Their big advantages are the UV coating and 10-20 year warranty (may be required by insurance or building codes in your area... for instance if it doubles as a sun room on the south side of your home)
@@SimpleTek Airtight seals are the way to go. The cavity depth affects internal convective currents as does the panel orientation. A vertical panel is more susceptible to convective currents than a horizontal panel.
Nice breakdown. Looks like polycarbonate panels are likely the best choice for my plans for off-house cold climate Winter solarium. I want to be able to the walls off in the Spring but leave the roof as a shade in the Summer. I may look into using the corrugated panels on top of the double walled panels as a way of protecting the roof from moisture, depending on flashing options.
I built a greenhouse out of corrugated clear plastic. Only my roof is clear, my walls are solid with foam insulation. It is summer and now that it’s completely enclosed. I can’t keep it cool with a inlet and outlet fan, and a window air conditioner. If it’s 90 outside, it’s over 120, as my thermometer only goes to 120. The ceiling is really low, and flat, so that doesn’t help. I’m sure it would be great for winter time. Anyway, I’m thinking of framing a sloped ceiling above the existing ceiling, and covering it with solexx. I imagine the heat will trap between the two, and I can vent it. Also, maybe I can use it as solar heat in the winter. Being that, not sure if I should use the solexx or corrugated plastic again.
On a wooden frame, Couldn't you put a layer of 6mm plastic on the inside of the greenhouse and then use corrugated on the outside of the framing? That would give you inch and a half gap
The last you talked about is easy place a spacer on the first layer and block off the ends. Just stager your spacers and that will help warm air flow between sheats.
Let me know what kind of greenhouse covering you are using or planning to use and why!!!!!!
;)
When covering the outside with corrugated plastic or twin wall polycarbonate, you retain the option to add a layer (or 2) of plastic film to the inside. This can allow the plastic to last much longer since it is out of the weather - especially if the outside layer has UV coating.
Did you know that many of the political campaign signs that will be discarded in November allow sufficient light through for a greenhouse and have decent insulation value. Combine that with some free pallets and you can make a free gambrel style greenhouse 9.5ft tall by 11ft wide by any length. You can fill the pallet studs on the north side with free cardboard and cover the inside with another layer of signs (to keep the cardboard relatively dry) to get ~R-20 insulation. The clear PET from 2-liter bottles can be used for little windows. If you have a few dollars to budget, then cover the north wall with either Mylar emergency blankets or a reflective insulation blanket to reflect some light back. Rather than using raised beds, dig sunken walkways to tap into the ground's stored energy and keep sufficient water storage for thermal mass to help balance the night/day temperature swings. I painted my black watering pitchers white on 1 side and point the black side toward the sun in winter and the white side toward the sun in summer (when I remember to)
@@technosaurus3805 Fantastic advice!! Thank you so much for the input
Im in Maine and planning to use twin wall polycarbonate as a roof. What do you think about that?
@@ef3345 Twin wall polycarbonate is a durable strong fantastic material with about an R2 insulation factor - very similar to glass but less breakage possibility. it tends to be be transplant not transparent but that's all you need to grow plants! Great choice
I built my first 11' x 14' poly tunnel several years ago using what I already had - a roll of 6 mil "visqueen" from Lowes. The skin lasted exactly 2 years, and it was great. I moved it and rebuilt it this spring and used the same material again for the same reason - it's what I had. The benefits of having any kind of greenhouse are so great that you really shouldn't put it off because you are waiting to afford something better.
I totally agree - fantastic advice!
Given the uncertainty of supply, having food and herbs like peppermint, ought to be incentive for a greenhouse now.
@David LaFerney Thank you for sharing your experience! You have helped me make my decision :-)! God Bless us all
I'm impressed by the amount of relevant information and the 'good energy' in presenting it -
Thank's
Thank you
I bought a prefab greenhouse with single wall polycarbonate that was too hot in the summer and too cold in the winter (SE Montana). I had to move it on the property after two seasons that required taking it apart. I took advantage of the move to put it on a block foundation, add power, lights, and ventilation, and most importantly, covered the greenhouse with Solexx twin wall. I put the original single wall polycarbonate back on OVER the Solexx and secured it all to the wooden frame, much like the greenhouse at 08:30 in this video. I mostly use the 8x16 greenhouse for starting seeds for the main garden season, and growing greens like lettuce, kale, chard and spinach under domes for winter salads with supplemental heat from heat mats. I also. Have close to 100 gallons of water in 5-gallon pails and milk jugs for thermal mass. Today is sunny and with the outside temperature of 25 degrees, the inside temperature is 74 degrees at 1:30 in the afternoon. The low last night was 13, and the low inside near knee level was about 27 degrees ( I was tracking the air temp on the water jugs) The peppers and the eggplants that I held over from last season as an experiment, that were sitting on the heat mats are OK, but a couple that were not on heat mats got frosted, though if I had remembered to cover them, they would have been just fine. Again, looking at the greenhouse pictured in the video at 08:30, my door faces east the right hand side faces north. My vertical sides on the north side are insulated with 1” foil faced bead board, and the whole north roof is faced with aluminized Mylar bubble sheet. I am still working on improving the systems.
thank you for the update - please keep me informed as you go forward!!!!! Good luck!
2 years ago I used the corrugated panels on the outside of a framed greenhouse. Sealing all seams with silicone. The first summer day with low humidity, I used insulating 3 mil clear plastic and stapled to the inside of the frame. with the clear tape to seal all edges. I used a clear silicon exterior caulking adhesive and staples to attach. This seems to be working well. The air gap is the width of the 2x4 I have no idea what the R value is. I think because there is no wind stress on the plastic, it still looks brand new. Because I waited for the low humidity, I am not having any discoloration between. This is only on the sides, as I use the ends for ventilation. I am still working on having both on the ends. Hope this helps. BTW it was tedious to build, as I matched the hills and valleys carefully on the ends, so they could be completely sealed with the silicone and not allow moisture between the layers.
That sounds awesome, thank you so much for the detailed description of your greenhouse!
Did you think using foam pipe installation for the ends so that foam material will form with the shape of the panels there by no longer need to match "hills and valleys" would work?
@@leeames9063 Foam pipe insulation is an open cell foam, so I think you may have trouble with it fogging up as it will allow humidity to get in. Just my opinion.
nice, unbiased.....I use a double poly stretched over an aluminum frame.....the poly is easily replaced.I got it free, as it
needed some work...some torn panels, some bent aluminum, but it has been functioning now for 2 years. Its a 10x12.
That's awesome!
How about using the poly rolls under the corrugated panels to add extra insulation since this panels already have a gap due to their shape. I wonder if this will prevent much light from coming through?
Good idea
My uncle used the corrugated panels. He used them for a 5x5 greenhouse and doubled the corrugated panels by making a 3/4” gap between the panels. It was nice and warm and I’m considering doing the same at our house. P.S. at our previous home we made a 2x3 greenhouse with used windows that we got from the habitat for humanity restore store.
That’s awesome
With corrigated plastic on the outside could we insulate it with bubble wrap on the inside, or even sandwich bubble wrap between two sheets of corrigated plastic. In Australia I'm sure I've seen uv protect bubble wrap sold as a posible green house covering.
Good idea
FYI, My father built a greenhouse using corrugated semi-clear (tinted, summer temperature was too hot) corragated plastic sheets. We fastened the sheets to the roof timbers using corrugated molding strips like these from Lowes - Tuftex Wood Solid Roof Panel Closure Strip. Over the years only had sheets loosen up a few times. Installation wasn't too bad.
Thank you for the reply! I really appreciate the real world input on this!
i built a dyi 8x20 greenhouse .I bought a ''used'' 30' clear pool cover , its like buble wrap and Its strong. I also used , ''used'' patio doors as the window around the sides. Last summer and into January the plants were great. How long it will last here in Canada is yet to be determind.
cool idea!
I was even thinking about using stretch wrap. I've seen pallets sitting outside covered in this stuff and it lasts years. It clings to itself and you can make several layers wrapped around whatever frame you have.
it can last if it's UV protected plastic
If the structure isn't too big, it could be a good cold hoop house. The plastic is generally only used in the winter and cut off in the summer. Maybe it can last longer, I know that stuff is strong in multiple layers.
@Willie Me too, considering the same material.. God Bless us all
I use a corrugated Lexan in a Greca pattern from Amerilux. It is called soft lite and disperses the light so you do not have any shadows and it penetrates the canopy at multiple angles so you obtain much more growth lower on the plant. I used it on our first greenhouse and am now installing it on our second greenhouse which we are building.
very cool!
Since the minimum order on this stuff is 31,600 sq ft, you must have a heck of a greenhouse! Congratulations!
Hi Im building a geodesic dome with wooded battens.
Which glasing material should be used?
Do you have any videos on how to cover a dome?
Cheers M.
I do - in my archives on Simple Tek
I use corrugated plastic panels for my greenhouse. I doubled it up using spaces for my air gap. Works in Indiana cold winters.
That’s awesome
@@SimpleTek I will say, I don’t grow much of anything in my greenhouse. I use it to keep tropical species of turtles and tortoises in through the winter. Same principles apply and channels like yours are where I send other turtle folks to learn.
@@hoosier_turtles_and_tortoises that’s awesome. I use mine mostly for my hot tub in winter
@@SimpleTek I wouldn’t mind adding one for a hot tub myself! Lol
@@hoosier_turtles_and_tortoises hehe
I have 2 greenhouses covered with a single layer of poly. In Tn i can grow lots of cool weather crops in the fall, winter and spring, without heat. If it makes it to next April it will be on 8 years. If not i will replace it. I bought the poly in 2013 and bought a long enough roll to cover the first one twice for about $200.00. I bought it from Amish in South West Ky in Elkton, KY. They have a high volume of sells so they can sell cheaper than some people.
that's awesome
I really like your channel and have learned a lot. I live in Michigan and am looking to build a greenhouse that I can grow all year round. I will be using a hydroponic system and wanted to know if you have any design resources for the greenhouse.
Thank you so much for the kind words. The only resources I have are google and the archives of my videos on TH-cam
I used corrugated panels clear and for the top I used tinted panels. It’s too hot inside 115-120 now I’m trying to cool it down. I just bought shade cloth for the top, I’ll see if that works. It’s cooking my plants. South Mississippi
Thank you for sharing
I have a 6' x 20"wide path X 8' long behind my storage SHEAD and Neighbours chain link fence facing south. What construction material would you suggest for a starter greenhouse, for sprouting new plants in spring from the seedlings I started in the Crawl space under grow lights during winter here in southern On, Canada?
do you have a helping hint or two?
try a kit
polycarb panels price has doubled since this release. I guess Home Despot/Lowes watch DIY vids, too.
I swear they do cos even pvc tripled in price 😢
Just a thought about air gap with corrugated plastic. What about corrugated plastic on outside and a poly roll sheet on inside of greenhouse to create the air gap.
great idea
I used the big box store corrugated panels for a chicken coup. Got clear & smoke panels both for testing.
Placed a clear then smoke alternating over sleeping/roost areA. Idea of smoke was to draw warmth from winter sun.
Worked very nice n chickens liked it & I was happy, provided winter sun to get girls up n moving n happy. I'd reach in & be quite nice even on 20° days. We get snow & of course would always melt off of smoke colored panels first. After 3-4 years , one day had a hard hail storm. Some hail measure 3/4" in width. The clear panels it punched a few holes in, (not many) & next panel which was smoke received No holes. Both panels were the same thickness and size installed same way. The smoke survived with out holes, but clear not as well. Realize in a green house only clear be used. Just what I learned.
Thank you for the information!
Corregated panels are pretty common in some parts of Montana. I was thinking of affixing poly on the inside spars to create an air gap.
great idea
Was gonna suggest same
Corrugated roofing panels use ribs at the ends when using as roofing. I wonder if you can use that ribbing to double the corrugated panel to create an air gap for insulation and if it would be worth it.
it's a thing you should try!
@@SimpleTek I was thinking that. I recently replaced my chicken coop roof from corrugate plastic to metal. I have some panels, but they're green, not clear. I'm going to experiment with them to check the temperature inside.
What about vinyl. Rolls of 4mm thick are $11 for a roll 44" wide and 18' long from Amazon. I am covering a large cold frame with it right now. 8' long, 5' tall, and 5'5" wide. 2" by 4" framing and 1" by 2" panels covered on both sides with vinyl. 1" redwood strips over the stapled plastic.
is it transparent or transulent ?
@@SimpleTek Crystal Clear, it was not easy to get the wrinkles out. I am now trying shrink film.
Thank you. great information. We live in N.W. Montana and on the side of a mountain getting more snow and colder temps, snow shedding, very short days into the winter but still wanting to grow at least 10-11 months out of the year. So this information is important for use. We are planning and will be building ours this summer 20x40 and unless something changes will be using double wall plastic inflated. Thank you again.
That is awesome!
Hi! Hope you are well and love the videos. We are planning to building a greenhouse this summer using 16mm polycarbonate panels. I am aware that we need to tape/seal the top end of the panel but what do we do with the bottom end? Do we tape it with solid tape (same as the top end) or use the air flow tape and end cap that allows moisture to escape the panel? We are hoping to use the greenhouse in the winter months (living in Calgary) but are unsure of how to treat the bottom end of the panel as we want to keep as much R value as we can. Thanks so much in advance for your time!
Very good question, I haven’t used polycarbonate panels yet, it’s a good topic to explore in a future video
Wondering about combining corigated and polywraps ( the cheap roller stuff)...
good idea
I was thinking about the same thing. Building a ridged green house with the corrugated plastic on the outside and on the inside secure poly like a vapor barrier. The 2x4s will provide the air gap and as long as you use the little corrugated end caps, it should be fairly airtight.
@@Rambw249 sounds good in theory!
A lot of rain this summer in my zone. I need to make my choice soon. Your video helped me a lot. Thanks!
Glad I could help!
Thank you for the information! I'm looking at converting a wooden gazebo that needs the roof (shingles and some corrugated panels) replaced anyway. I'll look further into Solexx as well as double layered polycarbonate.
Good luck!!! Prices are all over the place now after the pandemic
Air gap for corrugated plastic? Try bubble wrap maybe?
do you know of any UV treated bubble wrap - cause plastic without that will be lucky to make it one season
@@SimpleTek I assumed the corrugated plastic would be UV treated and would protect the inner lining of bubble wrap.
@@SimpleTek Usually used primarily as insulation in winter th-cam.com/video/JL9gI9F0-7k/w-d-xo.html
Hi! I live in the caribbean which is basically hot all year round. Which plastic is more durable and is long lasting? Where would you recommend to purchase this material? Your advise would be greatly appreciated.
I’m not familiar with what stores offer there, but you can get lots of stuff delivered through alibaba and Amazon
Try building with two layers of clear corrugated sheets. Build similarly to house leaving air space in between. Where the outside is horizontally hung and the interior is vertically hung it seemed to baffle the cold air. I also used sticky window foam insulation on overlapping edges that I was screwing together on exterior walls.
cool
Love this information it brought up the option of using Solex again. Thanks, show us more like this.
Thanks, will do!
Imagine the weather in the area like wind storms, hail, etc. would determine what material a person would use. Recycle old windows or use more than one option within budget until afforded then wearability can be monitored like a test to see what would be best. Glass is so beautiful! Did not know there were so many options until now.
Thank you for the kind words!
I have a question...my husband and I recently built a raised garden bed approx 8 x ten with tall sides to keep animals out, however we live in an area in which we get hail storms, can I use an opaque white tarp over my garden for any extended period? Will my veggies still grow under there if I leave it on for several days? This would be temporary until we have time to turn it into a greenhouse...thank you?
all depends on the tarp and it's translucency ratings.
I used corrugated fiber glass panels from Home Depot. Inside the greenhouse I put layer of pool covering from Amazon. Pool covering is cheap because its not though to be used for a greenhouse. Anything for greenhouse is expensive. It's very durable too. There's 4 inch gap between the panels and pool covering since the greenhouse is made with 2×4 lumber.
Great idea!!!!!!
Do you use the pool covering for shading?
There are two types of rigid roof panels sold at Home Depot and Lowes, Palruf which you showed in the video, lacks the strength needed to be durable and is known to break under adverse weather conditions, not recommended for use in direct exposure to the elements. The other panel, Suntuf is designed to withstand adverse weather conditions, I used these panels on my Ana White barn style greenhouse in central Maine and have never had a problem with snow loads, etc. The Suntuf is also a UV protected panel and has a transmission rate of 90% in the clear panel. The polyethelene rolls if bought at Home Depot/Lowes is transluscent at best and seems to block the transmission of hig red light, the result are plants are elongated, not a good GH solution. The other option, Home Depot sells the double layered panels which you mentioned, good for non flexible applications. Here in New England home grown green houses are primarily used to extend the growing season and generally not used in the colder months of the year. The greenhouse can allow one to start the growing season well into April and at the other end into October.
Thank you for the information!
Yeah, you need greenhouse plastic rolls not construction plastic, try a good garden supply store instead, also you want at least 10 mil plastic.
we have an old carriage house on our property with our small 9x11 foot greenhouse next to it. We have a plan to demolish both and build a 30x50 foot greenhouse or a 60x35 foot greenhouse, our plan is either traditional or a hoop house on top of a box structure to make it much taller. We also might attempt a barn roof style, our requirements are that it must have a rectangular base, be around 30-60 feet tall, no more than that though (we plan on having palm trees in there so it must be tall, but not so tall it could shade the garden near it.) it must shed snow well, and last a long time. I was thinking glass because our current 9x11 is recycled glass, but ofc that’s too expensive, so then I was thinking polycarbonate, but that’s kind of expensive too right? I really want your opinion, and I don’t think the flimsy plastic wrap poly stuff would work for where I live where it gets down to -30 sometimes and we get 3+ feet of snow.
if you use greenhouse poly, use 6mill or great, UV treated, and DOUBLE AIR INFLATED. that is usually rated for 6 years but double air inflated it'll go ten years. the cost savings is ENORMOUS. as long as it's rated for your climates you'll be fine. I use it and we get -40'
@@SimpleTek wow okay thanks! :)
@@SimpleTek do you have links to where i can get the plastic?
@@BigCroca I bought mine from alibaba
@@SimpleTek oh okay :)
If you want double wall corrugated, use 1”x1” wood spacers between the panels to provide the air gap. That should give triple the strength without making the panels excessively heavy.
Good idea
Thanks for sharing your valuable information with us, 👍
Thank you for the kind words
Can you use black thick plastic bag material to cover greenhouse to g r ow tropical tree under?
yes but it won't last very long and it doesn't have ultraviolet filters
What about about corrugated plastic + single layer poly? Hard outer shell, plus an air gap?
I like it
@@SimpleTek any idea how to get a seal between the 2?
What if you used the corrugated plastic on the top side of the lumber and on the inside of the lumber? Whouldnt that be a 3.5 inch air gap for insulation?
good idea
I was just at Lowes and the price for a 4x10 sheet is: corrigated plastic $47 and multi-wall pannel polcarbonate is $54. For that alone I am choosing the poly pannel. Thanks for all your info.
Prices are all different now since I made the video
Hi there I suggest doubling up corrigated sheets using rolls of self adhesive neoprene which can be bought in a variety of widths and thicknesses. small pieces off the roll could be used as spacers mid sheet and run the roll full width to end seal the doubled sheets
Thanks for the tip!
First off, I think I've learned a thing or two watching your videos. Thank you. I am wondering if it is possible to lay fiberglass over a geodesic dome and sand and polish smooth to a close to glass like transparent finish. I would really like to hear your thoughts on the possibilities if it's possible.
Thank you for the kind words! honestly, I have no idea if that would work, I suppose it would but it feels like the amount of work would make it cost prohibitive?
It's a good idea. Anything is possible if you can draw it, you can build it.
The resin choice is critical with fiberglass. UV transmissibility is often overlooked as good quality spectrum vs UV damage of polymers.
Some polymers are immune to UV and that is my choice.
I just had this video pop up in my feed, it’s perfect timing as I’m in the process of deigning an three season 12’x20’ greenhouse, so far I’m leaning towards the corrugated panels 26”x8’ for the roof since we live in a high snow load zone. Im looking at using DURABLE REINFORCED TRANSPARENT PVC PLASTIC TARPAULINS PROTECTIVE COVER: Thick Material, High Temperature Heat-sealed, Firm, Tear-resistant, Durable. Transparency: 99%; Water Resistance Index: 100%; Thickness: About 0.39mm thick. I just have to research it a bit more. Thanks for sharing this video.
glad it helped
Thank you for clarifying covering materials. Excellent and concise. Thanks.
You're very welcome!
Thank you for the video. Very interested in various greenhous/year round growing options.
Glad it was helpful!
A clear teflon coated ( dust/dirt mitigation) outer layer with a light scattering inner layer spaced with an air gap is the best way to get max light in, and keep heat out. What you spend on the panel actually compensates itself by lower electricity costs. Cannabis is known to love bright lights.
If you can get that stuff cheap…
With grand Soler minimum coming we will all need to use green house to lengthen in the growing season. A vidio on framing the green house would be interesting.
You. Would use the poly panels for the outside and add a airgap and second layer of poly sheet on the inside of the frame where it would last longer.
We’re way past the Min, much closer to the max now.
Thank you for making this. I suggest for your research on corrugated plastic panels and a space between layers, to try experimenting with a combination of drilling matching holes in panels, stacking something like rubber washers for garden-hose connects as spacers in between, and for a pass-thru fastener using an aluminum pop-rivet. Inexpensive and easy. I have a growing/greenhouse project in my mind for the future to address current threats to our society's food security by being tethered to long, complex supply chains spanning multiple continents. A second job the panels can do is be used to recover the distilled water condensate where convenient. Best of Health to you.
Thank you do much for the ideas!
@soaringtractor Thanks for the info, since I posted, I've been dreaming about a project to build a human terrarium/edible jungle to hang out in during the Winter days when there's 3-5 feet of snow outside.
Hello what kind of temperature would i get inside my double layered polykarbonat greenhouse house if its +7 Celsius/44 Fahrenheit outside Just wondering, might be a stupid question. Good video:)
thank you for the comment. if sunny you could get 20'+ inside.
@@SimpleTek thx 🙂
Did you come up with a way to do a double layer of poly carbonate?
yes, you buy it!!!!!!
@@SimpleTek I wasn't trying to be funny or make you mad. I meant building it with a large enough air gap to get the R value you want.
Since corrugated planes are so cheap, could it potentially make sense to double layer them for increasing R value?
Like by fastening it on the top of the 2x4/2x6 stick frame, then another layer fastened on the bottom side of the 2x4s to get that air gap. Similar to the method used to increase R value of poly with an air gap.
Just looked up how much corrugated panels cost, and tractor supply store has a 10 pack of 26”x8’ for $120. For that price I might just try a small build double or triple layer build to start, and see how well it can work in a growing zone of 2.
Really don’t like the idea of poly wrap since a windy day could potentially blow a tree branch tearing the wrap.
Worth trying!
Excellent information! Thank you for sharing!
Glad it was helpful!
Thank you for your great greenhouse news I'm planning to build me 1 with plastic seats for Cannabis grow
That's awesome! Thank you for the kind words!
Did not understand the clear "..." panels, I'm not a native :) What is this wavy plastic called? 6:34
corrugated plastic sheets
You can get foam profile inserts for the corrugated sheeting that will allow you to achieve an air gap between two sheets.
It is used for draught and vermin proofing, vibration and noise control, air and weather sealing and watertight sealing.
the issue is transparency, would the foam profile insert allow light to come through?
If you align the foam profile inserts with the beams of the supporting structure, you won’t lose any more sunlight.
Thank you for sharing this valuable information.
Glad it was helpful!
Your last thought about adding an air gap with currogated. why not just put it over the poly?
good point!
At 8:12 in the video, that is not Solexx. It is a product called SolaWrap, which is a heavy duty UV resistant bubblewrap plastic on a roll. SolaWrap is much more affordable than Solex. It's an option I've considered if I built a greenhouse.
OMG you are correct! I made a mistake. I'm so sorry Solawrap, and I made a link to the product in my description just now. Good eye - thank you!
I'm just planning on building a huge Greenhouse this here so perfect timing thank you.
;)
Commenting. I love this vid. I’m thinking of the corrugated option with an inside poly liner to create an air pocket.
I like that idea
I had that very idea in mind just as I was reading your post- :)
Let us know how it goes.
Couldn’t you do a layer of the corrugated panel 1 on the inside of the frame, 1 on the exterior of the frame? It would create and air pocket, you could seal off.
great idea
Does the polycarbonate sheeting pollute green house air?
Not that I know
Any ideas on how to keep a greenhouse warm in Michigan winters?
Lots of ideas!!!! check out the other videos on this channel, there's piles of videos on greenhouse heating ideas!
Look into growing Rabbits.. body temp of 105 and compost makers.. worth a look..
I’m Just now seeing your video for the first time and I to are looking into the carbon poly panels from Home Depot. How did you make out and what did you end up doing with yours? I was thinking it was it possible to double them up using the foam installation product in longer screws. Did you try this?
With double Poly inflated the inner poly lasts a long time, right? Inflate a Poly sheet inside the corrugated panel for diffusion and insulation and I think you have something rigid, lasting and insulating for cheap.
great idea!
What type of material doesn’t block any uv light?
@@DaGrrBrr glass is the best
6th choice. Looks like solex but super cheap double layer polypropylene sheet. Naturally UV resistance and warm. Use double walled with corrugated polycarbonate. Leaving a gap at the bottom and a gap at the top.
For superior insulation
@@Master-AGN cool
Hi friend
I will be doing 32 large window interior double pane glass for the winter and transforming them to incorporate them into my solarium wrapping around to the farmers porch. Just need to source the glass.
everything is harder to get after the pandemic
I love all these videos. Great info to help in the cold NH climate.
Glad you like them!
the corregated panels can be made double paneled using silicone ribs between the panels and using rubber gaskets or bracket the end with jchannel just like on eaves on a house.
interesting
Additional info : polytunnel/hoophouse polythene can last 10+years if researched. I had some that lasted 15 years before I dismantled the structure. Also, never use corrugated plastic panels in areas of extreme cold or high winds. This stuff is really brittle if hit by flying debris, or flexed in sub-zero temps. The best bang-for-your-buck is the inflated doubled polythene. A high tec example is The Eden Project, Cornwall, UK, where their laviathan greenhouse domes hold rainforests and savanas. Well worth a visit.
Thank you soo much for the info! My double inflated poly greenhouse withstands 100kph winds all the time without any problem
i was going to turn my pole barn frame into a green house *(at least temporarily) and I had thought of going with the corrugated panels on the outer frame with a poly sheet stapled to the inner side.. that would get me about 6" of air gap easily relished with a small fan providing a positive pressure.. i think it will keep my green house from getting too hot in the summer and warm in the winter as I live in north FL and that wouldn't take much if I connect my fan to a thermostat I hope to be able to have it self regulating without constant attention. a "smart" greenhouse. Thanks for this video.
Have fun!
Corrugated doubled or over poly. Maybe the fan will help if double the corrugated. Great informative video. Thanks.
thank you!
Hello there love your Greenhouse material video
Thank you soo much!
Just a thought, many steel buildings have light panels in the roofs to utilize daylight. I'm going to a builder next week to source these panels. They are translucent , not clear.
keep me updated!!!!!
I think they will work, but do not really know.
Thanks for this information 👍 I'm now another step closer to my greenhouse build 🥔🥦🍓🥕🍅🥒🍆🥬
Glad to help
Thanks for the information and happy growing👍👍👍
u2!!!!
What coverings provide the highest crop yields?
The ones that let the most light through
for double wall poly carbonate corrugated panels, glue two foam spacers back to back, add second layer of panels, and adjust framing to suite.
Thanks for the tips!
Hi we currently have double wall poly carbonate sheets. So far working great
That's awesome!
I built a hybrid using recycled sliding glass doors and Windows with a corrugated plastic roof. I did have to replace the roof after about 7 years because i it wasn't adequately supported and sequered and that caused warping in the heat. It also became very brittle and fractured as I was removing the old panles. The price was great and I figure most of the issues were do to used error.
Thank you for the comment!
Ty for all your videos! But in my opinion etfeis the best greenhouse covering. It was used on the Eden project built in the late 90's and early 00's. It is still in use as a covering today. It may be a bit more expensive to get at the start but the long gevity easly compensates for that.
Thank you for the information!
I would love for you to make a video in the light quality data of the cargated roof panel... it's an awesome idea!!!
I might build one this summer!
I used corrugated plastic sheets on the out side used staples to secure two layers of poly one the inside. One layer is half the studs. Helps with insulation value and corrugated material blocks damage physical and uv
thank you for the comment!!!!
I do think I need to use the local reg plastic roll , is 4 mm 25x 100 a good deal at 66.00 ? I'll b using steel rebar frame, feels like the steel is making a magnetic effects, any advise before i commit
Help I need cheap but want it to last
buy from china direct!
Im in Manitoba where it's really cold. Is the corrugated panel gonna keep it warm in the winter? And is it easy to make air tight? That looks like it would be difficult!
I'll be honest. I don't know. As I said in the video I just found out about clear corrugated panels. I'm in Manitoba as well!!!!!! So I'm left with the question, does the air gap have to be air tight? With polycarbonate panels the air gaps often aren't closed off, and with double layer air blown poly people have relief valve's so the air is constantly circulating... but the real answer is I don't know and will find out with experimentation! Thank you for the reply and I hope you're enjoying this awesome February weather we're getting right now!
They sell (rather expensive) strips to put under the corrugated panels. Some of them are just porous foam to keep wasps out, but you can get solid ones too... or just squirt in some canned spray foam.
Their big advantages are the UV coating and 10-20 year warranty (may be required by insurance or building codes in your area... for instance if it doubles as a sun room on the south side of your home)
@@technosaurus3805 There's always a cheaper option! Thank you for the info!
@@SimpleTek
Airtight seals are the way to go. The cavity depth affects internal convective currents as does the panel orientation. A vertical panel is more susceptible to convective currents than a horizontal panel.
@@JohnGuest45 why is that?
I'm curious to find if these ommit gasses when heated by the sun.
I don't think so.. Every manufacturer is different though
Nice breakdown. Looks like polycarbonate panels are likely the best choice for my plans for off-house cold climate Winter solarium. I want to be able to the walls off in the Spring but leave the roof as a shade in the Summer. I may look into using the corrugated panels on top of the double walled panels as a way of protecting the roof from moisture, depending on flashing options.
interesting!
Could I double up the corrugated panels for insulation?
that might work!
Double up but please secure an air gap of about 7 mm between the 2 layers; try to seal the 2 ends. If no air gap the R value is very minimal.
I built a greenhouse out of corrugated clear plastic. Only my roof is clear, my walls are solid with foam insulation. It is summer and now that it’s completely enclosed. I can’t keep it cool with a inlet and outlet fan, and a window air conditioner. If it’s 90 outside, it’s over 120, as my thermometer only goes to 120. The ceiling is really low, and flat, so that doesn’t help. I’m sure it would be great for winter time. Anyway, I’m thinking of framing a sloped ceiling above the existing ceiling, and covering it with solexx. I imagine the heat will trap between the two, and I can vent it. Also, maybe I can use it as solar heat in the winter. Being that, not sure if I should use the solexx or corrugated plastic again.
thank you for the comment, it sounds like you clearly need much better exhaust vents. Make sure they are powered fans , just venting won't be enough
Why can't you double up on the corrugated material? They have spacers which you can double up on, front to back and then have a nice air chamber.
good point!
On a wooden frame, Couldn't you put a layer of 6mm plastic on the inside of the greenhouse and then use corrugated on the outside of the framing? That would give you inch and a half gap
Paul Robinson does that on his TH-cam channel
I used corrugated, I didn't know it was a thing.. 3 years in so far so good. We have lots of snow
that's awesome!
What’s the best to grow weed with? like I need UV to come threw
I don't grow weed, sorry
The last you talked about is easy place a spacer on the first layer and block off the ends. Just stager your spacers and that will help warm air flow between sheats.
good idea