How to Build High Performance Walls for Homes, LEED - PH - ZNE - Design, Insulation - EcoHome Guides

#BuildingScience #Walls #LEED #HowTo #Tutorial #GreenBuilding #Home

[Polyester_Avalanche]

Being able to see the cross section of the entire wall (except siding) along with the explanation, is helpful.

[bengt_axle]

One thing that is hardly ever mentioned is that passive and low energy homes in extreme climates reduce their carbon emissions for heating and cooling. Yes, they do require more materials (more emissions) but once they are installed they stay in place, possibly for 100 years. The gains we make from slowing down climate change now, matter, but are not accounted for in current cost/benefit analysis.

[mijalic]

Great presentation. Thank you for the time and effort you took to make this video and share it with us. Greetings from Croatia.

[barbaraharrison]

So there's a fastener every six inches that goes through strapping, through the first layer of insulation and into the stud? Then the second set of fasteners goes(every six inches) through the some strapping, through the insulation and only into the strapping over the first layer?

[kingduck]

How can you do double strapping like that when rockwool says you need 1.5” of penetration into wood for it to hold

[Hedgehodge-]

How is this done around windows and outside electrical ? I need to hire you to oversee my 1925 home on a hill (wind cuts through it ) for our family of 4!

[BOARDOM]

Did you require any engineering input/signoff on the strapping design/attachment for siding calculations over the thick foam? I know the BSC guys had done some research on it, but wasn't sure if it was an accepted practice in ON/QC yet.

[RS-eiyt]

Can you construct a passive house using light grade steel as opposed to wood frame. Please could you point me to the relevant information sheets for insulation etc. and how I would eliminate thermal bridging. Look forward to your comments. Thank you.

[wally]

How about the windows and door jams, show us details of the extensions.

[RogerWilsonTodd]

What climate zones is this particular wall assembly good for? (and which is it not for?)

[charlesseguin]

With a vapour barrier/reductive paint, what is the suggested method for when a homeowner wants to screw something into a wall? I typically use anchors on almost everything in my home, but if the paint is the barrier, is the tight fit of the screw against plastic anchor against gypsum enough to reduce/prevent air movement/humidity movement?

[BuildFriendly]

So do building code inspectors allow this to be built without the vapor barrier? I believe the airtight drywall technique allows for no poly when using VR paints, but requires caulking gyprock edges. Do you still have to use VB boxes on outside walls for electrical fixtures?

[ThanksAgain]

With poly iso exterior insulation, a Vapor barrier could cause mold in cold zones.

Air barrier is vitally important. It probably conserves more energy than the R value of insulation. And there are liquid elastmeric air barriers that are vapor permeable.

Is polyiso outside, Moisture wicks into the house, which means you do not want a vapor barrier or any clothes sell insulation. Everything needs to be open cell so the moisture can wick and dry into the house.

[nhannguyen-srvh]

8.09 I find it hard to believe that longer screws would of reduced the r value by 30-40%. Lets say you have one screw for every 2 square feet of wall. which is 0.0054% of the surface area. 1/8x1/8 divided by 288 sq inches.

[briand.wright]

Has this technique been approved by NBC in Canada? I think the vapour barrier paint is interesting.... but seems to me leaves place for moisture to slowly build up "in" the gyproc... especially during summer when "humidity" is coming from the outside meeting a cooler/colder airconditioned surface.

Also is this mostly being done in new construction. I have a client who wants to do this on his existing home. It looks to me this would totally mess up his soffit space and a roofer would have to do something first to make sure attic breathes properly.

[victorianlover]

I'm a woman (not a builder) in Virginia. I see them around here putting a wrap on the outside of the house, then the vinyl siding or bricks. Is that the same thing you're talking about putting on the inside of the house? Seems it would be better on the outside, stop it before it gets in.

[intothewildnow]

What thickness OSB are you using on your studs? 1/2" 3/4"?

[francislanefrancislane]

Hi! Would that work in a ship container house as
Well?

[flinch]

As I understand it, the short version is this: make your vapor barrier 10 to 20 perms so it can act as a brake without being a complete moisture trap.

[myhandletre]

Wouldn’t be better to build the walls with with Zip-R 6 (1 inch) foam to stop thermal bridging then spray closed cell foam 3 to 4 inches maximum thickness? That’s it.