Membrane / Discussions

How do you apply vapor barrier and insulation to a CMU house?

...membrane , is that correct? Either way, your first step would be to check out this forum page here that already discusses the issue: How to insulate a concret...

Posted by Scott Brekke Nov. 22, 2019, 9:37 a.m. Basements improvements 2 Responses

In the winter should you heat a low/dirt floor crawl space with a furnace vent?

...membrane at all on the ground, its just dirt? Is there insulation between the joists? Is the dirt floor flat or uneven with stone etc? Do you live in a hi...

Posted by janis hobson Dec. 11, 2019, 3:17 p.m. Crawl spaces 1 Responses

What is the best way to insulate the basement of an old house?

...membrane and create an air seal against soil gas. As for the top of the wall, how were you going to insulate the rim joists? Spray foam is an option for there...

Posted by Bryan Squirrell Jan. 14, 2020, 7:59 p.m. Basements improvements 1 Responses

What considerations should be made when installing a green roof on a metal building?

...membrane with the capacity to store water . A living green roof can last far longer than many other roofing systems when installed properly. We would need m...

Posted by Nina Flores Feb. 16, 2020, 4:57 p.m. Roof coverings 3 Responses

Can you use a vapour retarder paint on the ceiling instead of using a poly vapour barrier?

...membrane. That would be a solution for new builds, are you looking for a vapour barrier solution for Renovations? If you are simply concerned because it is an...

Posted by Anwas Qwelten June 8, 2019, 3:56 p.m. Air and vapour barriers 2 Responses

How do you do a vapor barrier in a dense pack cellulose wall?

...membranes on both sides makes me nervous in combination with cellulose. In Ottawa, temp can drop to -25 in winter and reach +30 or more with high humidity in su...

Posted by Ian MacKay July 26, 2018, 2:48 p.m. Wall assemblies - renovation 4 Responses

What do I in my basement where new insulation meets old?

...membrane, drainage matt, signs of water damage, etc.), it’s impossible to say for sure, sorry. Without doing a full demolition of your laundry room, can you a...

Posted by Steve J July 20, 2019, 10:01 p.m. Basements improvements 2 Responses

Is polyiso board or styrofoam best for insulating when finishing a basement in CO?

...membrane on the basement wall? And have you ever had any flooding issues, either from bulk water, or just high water tables?

Posted by Evan B. Nov. 21, 2019, 8 p.m. Basements improvements 1 Responses

How do you prevent mold in a finished basement?

...membranes work and where to put them. And that’s just one way to do it and there are lots of ways to build basement properly, so I would say start with a look...

Posted by Brian Cole Nov. 22, 2019, 10:22 a.m. Basements improvements 1 Responses

Should a Vapor Barrier be installed over Exterior Grade Plywood?

...membrane. The following video explains fairly simply how vapor moves through walls and will help you understand the issue. Building science for LEED v4 wall d...

Posted by Michael Klauck March 6, 2020, 1:24 p.m. Air and vapour barriers 1 Responses

How do you improve an old block foundation with no insulation or exterior moisture barrier?

...membrane. Insulation if probably fine if the mortar between blocks is not cracked or blocks shifting at all, but read here as well first about what causes fro...

Posted by Wilhelmina Lange March 11, 2021, 4:19 p.m. 2 Responses

How can I get rid of moisture between the vapor barrier and the insulation in a basement?

...membrane separating it from the concrete? Is there any damp proofing spray on the exterior wall, and or a dimple membrane? Do you get condensation on windows ...

Posted by David Mitchell Aug. 14, 2018, 6:32 p.m. Basements improvements 23 Responses

Can I add Larsen Trusses and cellulose to 1920s House in Minneapolis?

...membrane you would be far better off than the idea of an exterior vapor barrier. Myself I would have no problem with the poly right against the sheathing, bec...

Posted by Ken Traefald Feb. 17, 2020, 2:30 p.m. Wall assemblies - renovation 3 Responses

How do I insulate my half below grade basement?

...membrane to protect it from the ground then for sure it is ‘wet’ to a degree. Concrete is porous and will absorb moisture from the ground which will then migrat...

Posted by tom mckeand Oct. 14, 2019, 11:01 p.m. Basements improvements 1 Responses

My basement is smelly and humid, what can I do about that?

...membrane) that will protect your porous foundation walls from absorbing moisture from the ground. Be sure to consult professionals, and getting a second onsit...

Posted by Jeff O. Feb. 8, 2017, 10:22 a.m. Foundation and basement improvements 3 Responses

How do you remove moisture and condensation from basement walls?

...membrane and also replacing the insulation the only way to fix this? I have read that the external digging and waterproofing is very expensive. Thank you, A...

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

Is there anything I can do about a vapor barrier on the wrong side of a basement wall?

...membrane your concrete will always be wet and that's no problem as long as you take steps (like the rigid foam or poly) to prevent your walls from being saturat...

Posted by Iain B Feb. 8, 2021, 2:21 p.m. Basements improvements 7 Responses