Walls / Discussions

How should I insulate basement Walls in climate zone 5?

...walls are already dry and mold free? the exterior of the basement walls has 2” of foam on them so any warmer air from finished basement would permiate through m...

Posted by Chad Johnson March 25, 2019, 8:33 p.m. Basements improvements 1 Responses

Do natural swimming pools need retaining walls?

I am building a rectangular swimming pond 4ft deep. What conditions would make a retaing wall mandatory? I assume you saw our page on how to build natural pool...

Posted by Michael Applegate Sept. 21, 2020, 12:17 p.m. Natural swimming pools and ponds 1 Responses

Can basement walls to dry to the inside with foam board?

...walls. From all of my reading it says that your basement foundation walls can only dry to the inside. If I put foamboard on the concrete and seal it everywhere,...

Posted by Tim Hanrahan Aug. 20, 2020, 12:34 a.m. Basements improvements 3 Responses

What is the best way to stop thermal bridging between my ICF walls and my footing?

Unisulated footing under ICF walls allows thermal bridging into the concrete core of the wall allowing energy stored in the thermal mass to bleed into the soil...

Posted by Walter van den Broek Sept. 18, 2020, 11:23 a.m. Foundation choices 1 Responses

Can I put a breathable peel and stick weather (air) barrier on the inside walls and ceiling?

...walls and unvented flat roof ceiling. It's impossible to air seal all the joints and sistered joists with caulk or sealant because where the SPF meets the joint...

Posted by Anomika Singhn Oct. 1, 2018, 9:56 p.m. Air and vapour barriers 1 Responses

Can you use Foam boards on basement walls to stop condensation?

I am finishing my basement and my basement exterior walls are fully framed about 2” away from the concrete. They have mineral wool in between the stud bays but...

Posted by Chad Johnson Dec. 21, 2019, 7:59 p.m. Basements improvements 3 Responses

Can you install foam boards directly against basement walls?

...walls directly against the concrete, then rigid insulation boards afterwards? If so then I would say they are an expert in making mold grow perhaps. We must be ...

Posted by Ted Gorab Oct. 3, 2019, 6:09 p.m. Basements improvements 4 Responses

How do you remove moisture and condensation from basement walls?

...walls . As for your last question, yes, unfortunately the only way to fix it that we can think of is to remove it and do it properly. If you do that in the wi...

Posted by Aaron Keating July 27, 2019, 4:51 p.m. Basements improvements 3 Responses

How do you insulate a 70s home with 2x4 walls that has fiber glass insulation?

...walls . And here's another page all about how best to insulate exterior walls from the outside on older homes . Have a read over that to get some ideas and send...

Posted by Mark Aussenegg Nov. 26, 2018, 6:49 p.m. Wall assemblies - renovation 1 Responses

Could we use a raft slab with ICF walls on a sloped site?

...walls and then backfill it and you’re done. It’s not always easy to find an independent engineer that will design a raft slab, so I would suggest you contact le...

Posted by Paul Fischer Sept. 15, 2020, 2:21 p.m. Slab on Grade 1 Responses

What is the best way to insulate the exterior walls of an older home?

...walls with no insulation behind them. I want to insulate the walls but not remove the plaster as it's still in excellent condition. My house goes right to the p...

Posted by Geoff Kavanagh June 30, 2020, 4:01 p.m. Wall assemblies - renovation 1 Responses

What is the best way to insulate a Multi-material wall?

...walls+concrete blocks+bricks, all part of the same wall assembly? As the bricks that sit atop the concrete walls are uneven (along the grout and brick face), ...

Posted by Steve J Sept. 29, 2020, 10:15 a.m. Wall assemblies - renovation 7 Responses

How do you re-do the insulation on a old cabin from the outside?

...walls right to the studs in an old cabin in cold/very cold climate. It will be heated once a week in winter. There is no vapor barrier right now in the walls. I...

Posted by Raphael Couture Sept. 14, 2020, 8 a.m. Wall assemblies - renovation 3 Responses

Why is there mold on particle board outside vapor barrier on new addition?

...walls. We wonder whether the mould is caused by condensation between the vapor barrier and the particle board. The house had air conditioning going all summer. ...

Posted by Christine ML June 7, 2020, 1:35 p.m. Wall assemblies - renovation 1 Responses

What is the best material to use for wall and roof insulation?

...walls can dry , also read about the importance of air barriers for energy efficiency and durability . If walls are not built with airtightness and an ability to...

Posted by Babak K July 12, 2020, 8:43 p.m. Insulation and soundproofing 1 Responses

How do you prevent walls from rotting in humid climates?

...walls rot that could be for a number of reasons - it could be design related, quality of workmanship, or even due to a ‘ micro-climate ’, meaning their very spe...

Posted by Rose Alderson Nov. 5, 2018, 4:34 p.m. Wall assemblies - new construction 1 Responses

Does using T & G wood plank instead of drywall affect where we put the vapor & air barrier?

...walls. In the Edelweiss Demo House we used vapour barrier paint on the walls but we used poly on the ceiling. As for your building inspector, that could go eith...

Posted by Sue Colbourne Nov. 9, 2019, 6:16 p.m. Walls and ceilings - interior surfaces 3 Responses

What is your experience and thoughts on pre-fab wall assemblies?

...walls and more even more likelyis that prefabricated kit homes will be built, delivered and installed, faster and cheaper than the houses we currently build. We...

Posted by Shaun B Nov. 12, 2019, 4:16 p.m. Wall assemblies - new construction 2 Responses