Application and installation of an external wall insulation system
ฝัง
- เผยแพร่เมื่อ 3 มิ.ย. 2019
- External Wall Insulation (EWI) systems involve the installation of an insulating layer to the external fabric of an existing, or new building.
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External wall insulation can reduce heat loss and draughts and improve weatherproofing.
Reducing heat loss and energy bills
Reducing draughts and increasing the sense of comfort
It does not disrupt the house while being installed
It does not reduce internal floor area
It allows walls to contribute to thermal mass
It improves weatherproofing and sound resistance
It increases the life of the wall
It reduces condensation on internal walls
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don't you just love nice clean professional work!!! very well done!!
Great job at the installation and a very informative video as well.
Classic sample of quality great job. Thanks for sharing your job video.
Nice job guys well done for using Thermo Dowel Cap
Great video. As a future DIYer of an EWI system on my own home this is the perfect video. Short, sweet, plenty of step breakdowns I can go away and find more info on.
Did you try it yet?
Great job guys. Nice to see some quality on these installations. It’s the cowboys that hurt the industry......
@Luke Wayne sick bastard
Well done guys, super informative and well made video
I must say we thoroughly enjoyed the video buddy! Very informative and we'll explained! We just bought an old country cottage back in Ireland and we are going to do this for sure!
Make sure that if it's a stone built cottage that you allow the building to breath. The type of insulation used here eps is not suitable as it seals the building.
@@bigowenzy3397 ah thanks buddy! we actually decided to go with the Sheetrock backed insulation boards inside!
@Luke Jarvis
If you going to fit this type insulation you mention I advice for Ireland type of wet weather to sand & paint the wall with damp seal paint if you find it expensive then buy cheap white paint & add mould killer into it very important to do that (always wear goggle and mask) then when it dry stick to the wall plastic sheet the thicker is better then fix the insulated plasterboard trust me will make a big difference. Best luck with that
Fantastic video thanks.
Good video and good job! 👍
This video is very informative. Also the task is executed perfectly..
Proba job lads keep a high spec job and charge the right amount.
Nice to see we’re about 25 years behind Germany on this type of external isolation. The white top render with glass beads in it has a stunning finish to it.
Yes true, we also use this method in our country over 20 years now.Most of European countries do it like this.
Excellent video.
Whaouuu jolie travail vraiment c’est impeccable félicitation 👏👏
Excellent and informative video. My question is, What happens at the ‘joint’ with the neighbouring property, specifically is there any intrusion to their masonry/decor?
hi Paul.i have been applying this render for decades, where the boundary line of an adjacent property i e semi detached ,with this system there is a stop trim that runs from top to bottom that is mechanically fixed and silicone applied. Some firms will return the scrim on a bead, like its a window reveal for example. If there is already a "decorative" finish a lot of care is needed and the trim/bead is applied as near as possible to it.
super informative and well made video Well done guys,
Be interesting to try and fit new windows and door frames in a few years time. Kind of reminds me of a cheap stone cladding,, Jack and Vera Duckworth can cover theirs up with this.
The roof-overhang has been reduced to almost zero. This new render will get a lot of rain exposure and I wonder how long it will last - 5 to 10 years maybe? Does the system have a BBA certification?
My dads was done around 5 years ago and still looks great how ever it makes the house echo slightly inside also a neighbour a few doors down had a fire and it crept behind the render up to the roof, the firebrigade had a right time putting it out
Crikey, that's scary!! I wonder if a way to avoid this fire risk
That's because they might have used Kingspan , fenolic insulation. The kind that killed the people in Grenfell Tower in London . EPS or PIR is fine, not flammable .
Could you consider doing another video which shows how you design around some of the awkward things that one faces with a house, for example satellite TV dish fitting, closing the end of the insulation against an un-insulated semi, and so on? The Welsh Government's evaluation of the technology suggests that it is let down by fitters arriving on site and having to fix problems on the fly. They recommended that sites should be surveyed by a qualified person who would then design solutions to problem items so that the fitting team would come fully prepared. Thus a 'Nighmares we discovered and how to fix them' video would be illuminating.
I have no idea how these guys do it. When my house was done, everything outside the house was taken off, satellite dishes, drain pipes, security lights, alarms, outside taps etc. blocks of wood was fitted to the wall, the same depth of the insulation used and then everything screwed back in to place, but into the wood, not the wall. Then someone else comes along, fits insulation, render/pebble dash, job done.
@Dans Channel
Did it insulate well in winter ? How warm the house after than before insulation?
Did the rain had any bad effect on it ?
@@trysam we only spent 1 winter here before the external wall insulation was fitted. If I’m honest, I don’t know how much difference it has made. My house is not a warm house, it doesn’t hold heat well either, but that could be down to a number of reasons.
The only effect the rain has, is the same effect it has on the normal wall.
Pebbledash: (Roughcast)
EWI: (External Wall Insulation)
Primer
Starter track
Adhesive
Insulation board
Spirit Level
metal fixings
Thermo dowel caps
basecoat and beading
Under-sill bead
Beading
fiberglass mash
float (speed skim)
silicone render
Great job buddy!
Can it be used same material in Ireland? I know that people using it all over in Hungary, Poland Summer could be very hot winter could be -20 degrees. But it works perfectly well.
Excellent job 👍👍
I would love to see some follow up pictures of the house after a year! It looks like a good job
They did a full prefab ex coal board estate near me. It's crap mate, the depth of the reveals round the windows you could park your car on! And the cut outs for the drain pipes etc look aweful. Plus it's really soft there's only like a hard skin on it....slightest knock and it outs a big hole in it. I was digging out a garden of one of the house with my mini digger, piling the spoil up and a bit of concrete rolled towards house put a great dent in wall...😳 It's not good ...but I guess it's the only way to insulate a prefab house....wattle and dorb would be better...😂😂
Agree....after a year the effect of lacking ventilation shows its destructive effect on the internal living space. A pity this is not addressed in this type videos. Unfortunately this problem is hard to solve in old buildings. Again, this type of insulation does reduce the energy bill effectively of course, but the internal build up of humidity that can no longer escape through the walls, causes internal wall paint and wall paper to turn black, grow mushrooms after some time.....
@@paulbrands6239it’s we’ll known that when you insulate a house in this way that humidity is the next problem. So a dehumidifier is needed.
@@hearthjunkie8173 if there is a ventilation shaft in the house then simply getting a grill that's more open and leaving the windows on micro-ventilation can do enough to balance out the humidity. The main issue is that some people do not care, if you insulate your house you NEED to buy a thermometer with hygrometer and monitor the humidity in the house, if it's constantly high and improving ventilation doesn't help then you need to get a dehumidifier. Usually dehumidifier isn't required, because in winter the air outside is dryer (because it's cold) and you heat up your house, there is a drying effect and in the summer you usually have AC on (or at least I hope you do if you're renovating the house already).
What is point of insulaing a house to then have to bring in cold air through vents in winter to deal with moisture build up? Any cold drafts are going to make it very inefficient to heat the space?
What sort of detailing do you do to avoid cold bridges around window reveals and at eaves level behind gutters?
Silicone Sealant
What is the R value of the finished wall (exclusive of the original wall). Would this be a good system for a new block wall
Great job. The guys doing this are proper craftsmen. I've had a go at DIY render and it's DIFFICULT A F!
It’s piss easy
You can ether fuck em ir render and you can t fucking render
@@tomwelford your comment is completely unintelligible. I have no idea what your point is.
Al guess you'll never know then aye
@@tomwelford well done on another great comment. You've made a fool of yourself twice in one day. Congratulations.
We have external wall insulation, not done by this company (at least I don’t think it was) it was free, paid for by an energy company, they done 100’s around Knowsley about 10 years ago.
From what I remember, it wasn’t done as well as what is being shown here. This looks a real good job.
I always say they fitted our insulation backwards, instead of being cool in the summer and warm in the winter, ours is boiling of a summer and freezing of a winter.
Very strange situation only your house or others in the area ?
@@trysam I’ve no idea. We only spent 1 winter with out the exterior wall insulation. If I’m honest I couldn’t tell you if it made a difference or not. It is cold of a winter, a lot Calder then my parents house which is a conventional construction. Doesn’t hold heat well either but, that could be down to a number of reasons.
I did my own ewi and the house is warm and dry in winter. Cool and dry in summer. For as long as I'm in good health, no trade comes in my house. I can do better than them.
what is the preferred method of fitting a replacement window in the future?
How are the windows replaced if need be ? as the insulation covers the frame and window cill in places ? Looks nice when completed.
nice work love you from pakistan
Nice work nice accent 👌
Neat. Good job.
Wow! Very impressive! Do you know how one can install these insulation pads (90mm) on a curved wall?
je cherchais a voir comment cela se faisait , c'est super bien explique.
I've seen this done elsewhere high time council got these done
What about cold bridging at window reveals? Is there a detail that might help to eliminate this? I ve seen problems emerge post-insulation where condensation that would otherwise have occurred on all walls in smaller quantities becoming concentrated around windows, with consequent mould issues.
I’ve just had this done to my house.
Is it warmer now??
Houses on our estate are getting done. I chose not to get my house done. They are putting the stuff over Sky and BT cables. Boards straight onto the bare wall, no cement or anything behind them just screwed straight onto the wall. No dowel caps. Think I made the right decision.
Very informative video. We have some contractors carrying out this type of work on our street. I notice that they only cut the foam tiles to shape and then fix them using only the mechanical fixings, they don't use any adhesive to secure the foam panels prior to mechanical fixings. What's the advantage of using adhesive and mechanical fixings?
1. Fire safety - no ventilating behind when bonding as you bond on all the perimeter of the boards trapping any air. Also you then have plaster adhesive at both front and back of the boards.
2. Loading - both mechanical and bonding produce far superior pull off tolerances to wind etc.
3. You actually don't use any less basecoat dry fixing because you normally compensate using extra basecoat to get it level.
4. Bonding first allows you to fix straight, which again gives better structural performance.
5. Bonding secures the boards to unlevel surfaces much easier.
6. Bonding gives the system much better change of not cracking in the long run, saving on maintenance costs.
7. Both bonding and mechanical how the Europeans do it especially in Germany where systems have had longevity 30-40yrs plus. The dry fix method is a British 'cost cutting exercise'
@@BeConstructiveLTD Cheers for the reply. I did think of some of the points you made as I watched the guys fit it to some neighbors' houses. We're in NE Scotland around 50 yards from the sea and regularly get winds gusting over 80mph or more through the winter and I did wonder about it being cracking or being ripped off. But of a shame though because it is more or less being done for free to eligible houses by the Scottish Government, but you can see our contractor is doing it as cheaply as possible. Wish we had a choice of contractor.
Is it normal to have uneven surface at parts of the finish that are on top of the mesh overlap? Especially visible when light hits perpendicular to the wall? (during midday or from a lamp on that wall)
You will always see a little unevenness when the sun shines in that direction, but if the unevenness is always visible then it is not good
Very comprehensive video with genuine tradesmen, I'm very interested in using this type of system on my own 1930 s house and would like to know more about the products used and how to source them. Any help gratefully recieved. Jon
You can get info and products from Ewi Store - www.ewistore.co.uk for the next day, with fair delivery prices
@@BeConstructiveLTD thank you very much for this. I will get on it straight away. Jon.
@@jonwilmot5331 it’s TH-cam comments not an email you don’t have to sign off with your first name everytime 😂😂😂😂
@@dylanmulroe9978 Yes he does, if he is a gentleman.
Glyn
Yeah Tyler
Do all the windows need to be face drained as the trim is going on top of the old cill as been sealed
What thickness insulation do you use and what U value does that bring the wall down to?
Seems straightforward, and the materials look fairly inexpensive. How does it end up costing so much?
All houses should have this including double glazing window, before the installation of solar panels. ( waste of money )
Then you can speak about saving. Keeping you warm or cold
believe me
Dom
Nice work well done👏👏
Hi, I've used acrylic rendering and it's surely very messy and even though it looks all nice and smooth in some daylight, it looks rough and uneven in different angles when Sunlight hits it. I am not happy with it. Can I reapply primer again and new layer of acrylic render top coat? Or is it better to use silicone render instead? Thanks for your time.
If its uneven and you can see it at angles you're not doing it right. It's a craft and takes lots of effort and time to learn properly.
Excellent.
This is such a good job you’ve done. How much does this typically cost. I have a semi detached property please thank you.
Este es el video que estaba buscando
Very interesting video how long it takes to do external wall insulation on three-bedroom property.
If you got four guys on the job you will be able to finish external wall insulation on your propertyin and about 5 to 7 working days depending on the weather conditions
Lovely job. What if you have piping coming out of the wall? I don't mean a drainpipe from the gutters. A waste pipe from the shower and another one from the kitchen sink.
Hi, what EPC rating did this bring the house from and to? Very good video thanks!
The property originally had a F38 rating and improved to D56 after the work done
I've been told my single skin 1900 built house will go from D58 to C52-70 with 50mm mineral wool external wall insulation. This can be in the
form of insulated plasterboard with at
least 25 mm PIR. I got a MEES report done by the company who provided the EPC report as I want to guarantee I'll get a C if I do the work! They also said I need loft insulation on south side and a new boiler (specific as I've already done it! They ask you what you've already done before running the report) and low energy lighting. If you're interested I used Easy EPC but I expect most EPC firms offer the MEES report. It cost about £65, EPC was about £60. You can ask them questions too, so I'm really pleased I got it! Now getting quotes for external insulation. This is a great video! Have emailed you guys for help finding contractor
This looks like what l need. What’s cost for ground level bathroom? In a old terraced house?
Hello, what was the reason for using metal fixings, over plastic ones for this job? Moisture can more easily bridge the metal ones, from what i understand?
What kind of adhesive you use?
Hi, is this a alternative method to say brick or panel cladding when constructing a house? Or do you use this as a in-between the timber framing and brick wall of a house?
Its main job is to super insulate, or "exulate". Its giving the house an external barrier before any of the heat on hot temps com in, and it does the same to keep the warm air in during the winters. But I see the advantage mainly in the summer and generally hot climate zones
@@philindeblancthe advantage is mainly in winter. Keeps the house warm. Indeed, keeps it cool in summer.
따듯하겟다.
are the base coat and render same ? what martial are them ?
How to put a nail into the wall if I want to hang baskets and need to put up brackets Will the drill go right through the foam ??
I am concerned about EWI particularly on masonry structures. Traditionally, British properties have been built with masonry internal and external elements i.e. brick and/or concrete block. This form of construction although it is porous presupposes that the wall can breathe so that external water penetration dries out and any moist air from inside the building flows to the exterior to join that drying process. The wall is expected to have interstitial condensation but this doesn't matter as the drying process takes care of it. With external wall insulation of the type shown the insulation is vapour permeable and thus there will be interstitial condensation behind the render that cannot get out other than having very slow drainage down to the base of the wall insulation, this makes the render susceptible to freeze/thaw and the eventual cracking of the render, which the plastic scrim cannot resist. Also, the strength of the cladding is totally reliant on a thin skim of render on a compressible underlayer and thus it will not resist the normal dents and dings that a building receives over its lifetime. Breaking the surface of the render will allow water penetration and eventually blowing due to the freeze thaw cycles.
My daughter had this type of insulated render fixed to her 1930's solid walled semi-d house and the immediate issues were with external services i.e. electric boxes and garden taps along with fixing for brackets on the wall face. The fixing base was some 60mm back from the face of the wall and the extension of the garden tap in particular lasted only a few weeks before it began to leak, saturating the insulation and eventually creating a puddle on the ground. The installation company had to cut out the damaged section, fix the leak and reinforce the water service extension, reform the wall insulation and patch an area of render Had this happened outside of the warranty period the cost would have been £100s. Fortunately, my daughter sees the wall insulation as a sales bonus and takes the view that any future defects will the new owner's problem!
Wall is dead, it doesnt breathe. Humidity diffusion through wall is negligible. 97% of vapour leaves the house through ventilation or recuperation. Lastly polystyrene is not vapour tight, and still allows minimal diffusion. Dew point MUST NOT be inside the wall, the thickness of the insulation must be calculated to move it outwards to the insulation which will permeate it outside. All the issues you describe are just jobs done wrong.
This system has been used in Eastern Europe fro over 40 years now with no such problems as you mentioned. If its done properly its tougher a longer lasting than traditional cement render.
@@1amelka I don't doubt that it is used elsewhere but UK has specific conditions that mean we need specific solutions. Our climate is very damp and our older buildings are very porous that relies on migration of water vapour from inside to out. I have specified render on many buildings and if spec'd and installed right it can last for decades and probably the life of the building. One building I was concerned with had stucco render (lookalike stone jointing) that had been insitu with no obvious repairs for 350 years
@@clivewilliams3661 its not the locations climate that will cause problems, Its the incorrect installation of the technology. If the environment is damp and humid you need effective ventilation.
@@1amelka The climate has a profound effect on the architecture and construction that is appropriate, just look at the vernacular construction around the World. I wonder how long a mud brick house from the Middle East would last in Ireland or the Rainforest of the Amazon?
The point with most EWI installations is that they are used on our stock of solid brick walled terraced and semi-detached houses to supposedly improve their insulation as a quick fix without understanding how the basic construction functions, its a case of inappropriate installation, although I also suspect that there are too many lowly qualified installers trying to make a fast buck on the back of the latest fad.
Ventilation is not necessarily the cure for a damp and humid environment. In the houses I am describing they aren't damp or humid in their original state but the location of EWI promotes interstitial condensation and that allied to modern lifestyles and heating systems can create RH values that the wall cannot cope with.
Could you use brick slips instead of render?would that keep the rain from the insulated board's?great video professional job.
Yes you can use brick slips instead of render there are few different types of brick slips best people to talk to and get the bricks slips from is EWI store www.ewistore.co.uk
which product is the render ?@@BeConstructiveLTD
Please may we have the cost breakdown/estimation for this? What EPC or BER rating did this bring the house from and to? I am looking to have this done potentially on a house in Ireland. Thanks
I’m no expert in this kind of insulation. However what I would say is I can only see this external insulation being any good if your house has solid walls. If you have a cavity wall then frankly I can’t see this insulation being of any help. However I’m happy to be corrected if someone can be explained the benefits.
What , of no help ? ridiculous .
if the interior walls have open cavities and the new insulation creates air tightness in the walls then the cavity becomes a dead air space . not as effective as insulation but still very good .
The biggest source of heat loss in any house is air infiltration . this system accomplishes both , eliminating air movement through the walls and insulation simultaneously .
what manufacturer did you choose for fasteners?
How did you find applying the 225? Have you tried applying this base coat using the spray machine?
We have a pft and a kaleta
Works well as a render only on the 225 because you deal with larger surfaces. Haven't tried it with the insulation as the jobs have been too small.
Wonder if this system can be placed over timber cladding.
Nice job ..what would this typically cost ?
How would you recommend drilling into it to install an outside socket? Would I need to go all the way through to the masonry or would the insulation provide enough drip?
I'm wondering the exact same thing? Have you installed the socket already and if so how did it work out?
@@jay-lm4we i bought plas plugs from screwfix. They're not the best to use but they are quite sturdy once you get the hang of not breaking the plug attachment it comes with
@@MrJustbrowsing12345 I'll check them out, cheers 👍
Great video
How do you extend an exterior Insulation window sill? It looks like you had one already on .
On the markets that are few different types of external wall insulation window sill extension The one we use most of the time it's aluminium window sill.
Where do you get them from?
Usually will get them from ewi store
Does a whole wall need to be done in 1 hit from roof to ground or can it be done in 2, can it be blended in to an already set wall?
The basecoat can, but the topcoat really doesn't blend in well. You need to go in mob handed.
If you spray it you probably could get away with it,using trowels and floats no chance it would be an eye sore
@@beatonthedonis Now I have a front porch similar to this size, I want to insulate it like this but I want to cover it in stone cladding to Finnish it. Should I put a coat of render on the insulation board then put the stone cladding i
on after that?
Why did you leave a gap down? It doesn't get cold from there?
Great video what parts of the country do you cover??
what is the mortar material of contact of the minute 0:35, what promotes contact foam vs wall? trademark, price, where do you get it?
Hi I'm moving from a tropical country to Melbourne and hear that a lot of housing there does not have insulation. So a complete newby so please excuse what are likely to be obvious or dumb questions. So the front of this unit is now insulated..how does one insulate the common wall shared with the next unit? Thank you.
Nice 👏👏👏👍
How is the top of the insulation sealed when only doing this on the ground level or even if all the way to the guttering to prevent water going down behind them?
Dropdown Verge Trim is designed to go under sills, soffit boards and applications that require fixing from below. This Verge Trim is available in various different widths to house different thicknesses of insulation. The Dropdown Verge Trim effectively ensures that water falls away from the system but minimises the requirement of expanding foam tape and/or a silicone sealant to ensure it is completely watertight.
Great video. Will this stop damp mould and condensation. Also how much will a 80m2 area cost ?
Thanks for watching the video .
External wall insulation protects the building's structure and improves weatherproofing. The finished render is durable and breathable so you won't have issues with damp either.
Prices to insulate 80 square meters Is between 7 -10K
@@BeConstructiveLTD Can this be applied on the inside of a new construction house.
Damp and mould inside a building could well be down to poor ventilation. Assuming that it is not damp coming through a solid wall, I think you would be advised to look into mechanical ventilation with heat recovery. That will stop the condensation, dry out the inside of the house and because it re-cycles the heat from the outgoing air, lower your energy use. However this will not be an instant solution. Our house took a good couple of years to dry out and stop being musty. Of course, for best efficiency the house needs to be as air tight as possible so that the ventilation you get is controlled not random.
Is this available in USA?
When the video said "long lasting" what is the expected numbers of years before it requires servicing?
Two weeks
What does the mesh made of
Occupants breath out about 1/3 tonne of water a year into the property. This will absorb into the walls and where the wall is breathable eventually migrate to outside. Four people in the house and you are looking at around 1 1/4 tonnes. Cooker hoods that do not vent outside and poor ventilation can make matters significantly worse. How is this system going to stop the fabric of the building slowly decaying to a brown crumbly mess?
how you stick those foams are wrong doing you must do channeling
Great video. Who should I contact. I have 1930 house pebbledash walls . Is it possible to do the same insulation?
Please let me know?
As long as your render is not coming off you can definitely do the same type of insulation.
If you email us postcode and a couple of pictures of your property we will be able To guide you what can be done regarding external wall insulation to your property .
info@beconstructiveltd.com
Could you tile onto these instead of render do you think?
nice!!!
The insulation grey foam boards are NOT safe it's not fireproof. Its burns quickly I tried it????
Hi, really good video. I’m just wondering if we need permission because our home is with bricks style finish and all the properties around are too?
Unless a listed building ,you don't need permission .
Can the material go through from my property the workers don't have an alley access
Is it silicone render on the insulation?
How can I get quite? I have 1930 house ?
Do you recommend any good company in Toronto, Canada
Thanks
Harvinder
I have a wooden holiday home in Hungary. Does anyone know if a similar external insulation solution exists for a wooden house?
Kind Regards
Alan McGrath
You can use the same technique replacing the glue and the screws for wood walls... Simple 😀
Look up EIFS
DOES IT SAVE ANY TIME AND IS IT COST SAVING? IF YES THAN HOW?
Whats the cost of this ? can old insulation be removed and the old fixing holes reused, instead of drilling more holes. Hollow Panel Reema
Its that ezzy?
What do u do if windows needed replacement ?
Only downside is on a street of terraces your house sticks out like a sore thumb as its a foot offset on the outside and resembles concrete nuclear bunker.