How To Raise Garage Floor When Converting It To Living Space - House Remodeling Ideas
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- เผยแพร่เมื่อ 8 ส.ค. 2021
- www.homebuildingandrepairs.com Click on this link to learn more about garage conversions, home remodeling and building repairs. In this video I will provide you with a few ideas and examples that might get you started raising a garage floor. Some of these ideas won't work with your local building codes and you might want to check with local building professionals for more information.
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Thanks! I have been thinking through how to do this project for a while now, and this video does an excellent job of illustrating all the different approaches
Another great video, glad to see you prefer cement, jm leanjng that way for cost and simplicity. I'm adding a 8x25 office in the back of a 20x25 garage. The stem wall for where the back door will go is about 4" tall with the top plate above that (perfect height for a 2x6 joist to rest on a flat 2x sleeper 10' out and be level). the remainder of the back wall is a 4' height cement retaining wall for a behind garage slope yard. I'm struggling with losing 7" of height inside for above office garage storage area even though the walls are 12'. Also considering 2" rigid foam on a self leveling cement floor and on the back wall to keep the drywall off the cement, but again I would be losing a few inches of wall space there and i think i would add furring atrips between the 4x8 foam panels. The good news is my climate is zone 6 so it's pretty easy going and the retaining wall and floor are sealed (I taped plastic for the past 2 months and no moisture inside). It's also annoying I can't run electric on the lower back wall unless it's by the door but if I fur the back 2x6 wall out a few inches for 2" foam maybe I can run conduit in there and a shallow single gang box for an outlet. So it looks like the back wall and floor might have 2" foam and the side walls, ceiling and interior garage wall will have Rocwool safe and sound batt for comfort an noise suppression.
Thank you for this very helpful video! Not many out there like this!
You're welcome!
Great video
Mr.Greg, continue on making these awesome informative videos I for 1 get a lot of knowledge by your videos. You know all the comments that bash what your doing shows the mental capacity from others . I’ve got a solution for them ..Have a great evening
I will and thanks for supporting our channel. This individual wasn't the first and I don't think they're going to be the last. I was actually thinking about making a video about all of the interesting comments I've received.
I'm happy to see that you didn't change the way you do things, based on some keyboard warrior's tauntings! Please keep the excellent content coming, and we'll continue to be in awe of your willingness to help perfect strangers understand construction methodologies!
I will and thanks for supporting our channel. I think the individual understood after I provided them with a little more information.
Great video, keep it up!
Thanks, will do!
Thanks. I like this video. Awesome
Glad you liked it and thanks for letting us know.
I’ve found your videos to be very helpful. Considering raising a 12x16 living room pit, your two cents is awesome. You have a new subscriber and fan
Awesome! Thank you!
Can you use OSB for sheathing and foam sheets underneath for insulation ?
Is it necessary to build a floor in garage conversion? If we don't mind the floor being lower than house? Could I just frame the walls and ceiling without the floor? Just build right on top of slab?
I believe my garage floor has a spring under it. Not an exterior drainage problem but a spring that flows harder and higher during the rainy seasons. I like the grid idea but since I have a real water/moisture problem should I use a plastic vapor barrier and wrap my bottom boards? I’m talking about the actual wood that would be in direct contact with the floor. Please help
I have done this by laying progressively thicker ferring on the sloped surface then adding a "joist" perpendicular across the top. This way creating a perfect looong taper doesnt have to be done which can be difficult. This also allows for an increase or decrease of joists for 12" or 16" oc.
So any opinions of doinv this with concrete over a CARPORR floor which does noy have the bounding footer and riser wall to support exterior walls like a garage would. My concerns are for the sweating of the concrete with currently installed wood plates that close the area in. Opinions?
I would think more vents could help, but it would depend on how much moisture is coming out of the slab.
@@gregvancom oh as in case it has no vapor barrier. It is already closed in and thus is or isn't wicking moisture now. More concrete probably would not be any worse and any wood may have issues just like whatver flooring is put down if it cant breathe. A few calcium chloride tests should answer the moisture issue and since my initial query I realized i could simply cut out the plate and shorten the studs since they are not load bearing since it was already a carport with supporting walls made of block. So i can simply place a form board at the outsid edge of the original slab to allow the concrete to go under the wood walls closing in the open portions. Then slip in a treated plate.
Very nice video! Greg, if my garage concrete floor is not lower than the exterior ground, may I simply put wood floor on top of the concrete? Thank you.
I don't see why not and some home owners just use existing floor with out leveling or raising.
@@gregvancom thank you.
I like the structural engineer comment.
Technically, it just has to support people and counters.. it’s not like it’s attached to the walls keeping things square or has two or three ft deep foundation to fall through.
You would be surprised at how many viewers watch other peoples videos who don't ever think about suggesting that an engineer might be required.
Great video! Greg. I am planning to convert my garage into ADU (no access from my house). My garage height is about 8 feet (concrete floor to dry wall ceiling). I am not looking to raise the floor. There is a slight slope but I am not concern about it. What kind of thinest floor structure I need to install LVP or hardwood floor. Thanks
Check with the product manufactures for best materials and installation instructions.
Would you use a vapor barrier if its cement? can you do a video on moisture and ventilation?
I will put it on my list and I wouldn't use a vapor barrier that could trap moisture above where the framing lumber could get wet.
I’m thinking about doing this to my garage. I would have to raise my garage floor about 1 ft 1 in. would you suggest just using concrete and then frame the floor?
ETA-I’m not accounting for the 3/4” plywood and the padded LVP as well.
It would depend on the design and another option would be to use stairs to step down into the garage.
@@gregvancom I did think about that but the laundry room is connecting to the “entry way” and we are going to turn part of that into a walk-in closet that’s connected to a bathroom…so I’m afraid the step up would also follow into the closet.
I have to put 2x6 floor joists on a concrete slab of a ground level room. What's the best way to protect the wood from moisture on the concrete and under the wood? Should I use 6 mill plastic, or something like dmx 2.0? Also Should I paint the floor with drylock or just leave it plain concrete?
I would check with your local building department for more information. I don't think it's a good idea to waterproof under framing with out adding air circulation or ventilation to remove moisture.
I called the manufacturer of DMX 2.0 and they said that should work fine. I'm not going to paint the floor, just leave ventilation around the edges for the DMX and lay my 2x6 sleepers on the floor and Anchor them into the walls.
Can you do this and still park cars and possibly do spray closed-cell foam? As I already insulated the walls and attic.
You could if you added more lumber or materials to support vehicle weight. I don't know if spray foam will work.
so i guess the first option with concrete is the best. does concrete need adhesive to bond to old concrete?
Most installers will use some type of bonding adhesives.
What is done with the gap in the foundation from the garage door? Will there just be an opening left below the structure?
I've seen most of them sealed with caulking and then if the garage get's converted back into a garage you can peel the caulking off.
For 1" rise over 8' (20' long) would you use just mortar or fix all? I'm guessing it doesn't need rebar since it's so thin but what about fiber mesh or something? Slab would be spanking 0" to 1" over 8', so otherwise I could go thicker and make it 1" to 2".
That's tough. I would leave alone if you can, but installing mortar or concrete between 1 and 2 inches is probably going to crack and separate. I don't have any product suggestions for your project.
How would you recommend raising the floor if the garage floor is 40" lower than the floor of the home?
I will put your video suggestion on my list of videos, but you could do it by building supporting walls underneath your joist and sheathing in the same way I'm using sill plates in my example. If you can email me some pictures of your project. You can get our email address at our website.
I have the same question.
@@gregvancom thank you. I will send you pictures of our current setup and the idea we are considering
Do I need to put kind of insulation between the concrete and the joist?
I am in a cold country. North of England
You might need to check with your local building department.
Thank you so much for this video! I recently purchased a home with a historic coach house in back that I want to use as a workshop. It has a concrete slab floor (not historic) that is severely uneven and broken in several places due to large tree roots. The trees are not on my property so I do not want to remove the roots, possibly kill the tree, and have neighbors who hate me. Since I don't plan to park a car in there I am thinking of ways to simply add a wooden floor on top of the broken concrete floor. I have been told by contractors that a new concrete slab would be at least 5k and might not last long since the roots will just break them up again. Any advice would be steller. Thank you!
I think I would build a wood framed floor.
@@gregvancom Great! That is what I was thinking too. Some sections of the concrete are in very bad shape and will have to be reduced to gravel. Do I need to do anything with these areas in preparation for being covered by the wood frame floor? For example a vapor barrier or tamping? Would it make sense to insulate as I want to install heaters down the road?
Any problem using a concrete-wood glue for attaching joists rather than concrete anchors?
Glue usually won't hold. It breaks or separates from either wood or concrete, but if you have some type of adhesive that won't, then it might work.
Use liquid nails… takes forever to dry but is permanent, short if a nuclear war.
what would you recommend for floor insulation?
I've never insulated something like this, but if I did then maybe some type of Styrofoam.
@@gregvancom Im doing this project now, frame out the floor with 2x4’s, 3/4 plywood and use batts insulation. No vapor barrier.
Ahaha, nice thumbnail!
Thanks to some awesome software I can put a real person's image in a cartoon background and glad you found a little humor in it.
I think a better video would be how not to ruin your home by closing in the parking for your $50k vehicle. ;) always breaks my heart to see a garage closed in. Don't get me wrong, I understand some people really need the space, but sometimes when I see space filled in like that for living space, maybe it was a TINY garage or here I see this with a lot of front porches, why you gonna spend all that money to gain a 5x12 space for your house? Seems like the money would be better spent on a proper addition! if you're spending the money, get what you want! :) but hey, I'm an electrician, so i'm speaking way out of my area here lol :) Thanks for the great videos as always!
I couldn't agree more, especially as one of the individuals who had to take the stuff apart and put the garage back together when the building department found out about them or once the house was sold.
Closing in a two car garage is 75% cheaper than building an addition the same size! If you need another garage one day, it can also be built far cheaper than an addition for living space.😉