Air seal / Discussions

How to air seal & ventilate a partial gut reno of a 1901 house?

...air sealing we have done has been applied to the inboard side of the exterior wall studs, and we are running a secondary 2x service cavity inboard of that air b...

Posted by Zach Zill Feb. 7, 2021, 4:33 p.m. Air and vapour barriers 0 Responses

How do you seal windows from the exterior for water and air but not create a vapor seal?

...air seal. Your typical roll of low-priced building tape becomes brittle in a fairly short period of time and is prone to cracking and coming unadhered. When air...

Posted by Piyush Prince Nov. 7, 2018, 12:10 a.m. Windows and doors 1 Responses

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

...air seal all the joints and sistered joists with caulk or sealant because where the SPF meets the joints, the seam is thin and air goes right though the SPF and...

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

How do I create a complete air barrier using a vapour retarding primer?

...air and vapour movement comes from the fact that usually one product (6-mil polyethylene) is used as both the vapour barrier AND air barrier, but air leakage an...

Posted by Mihai Wilson May 3, 2018, 10:15 p.m. Wall assemblies - renovation 1 Responses

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

...sealing it on top and bottom? I did air seal all sill plates already and installed new windows. My dehumidifier is an 80gallon heat pump hot water heater whic...

Posted by Tim Hanrahan Aug. 20, 2020, 12:34 a.m. Basements improvements 6 Responses

Is spray foam a good way to insulate a house from the exterior?

...air seal / vapor seal behind the drywall - this seems neccesary for other types of insulation. Does anyone have experience with re-insulation from the exterio...

Posted by Simon Levitt Dec. 21, 2020, 2:14 p.m. Wall assemblies - renovation 1 Responses

Should I put foam boards right against my basement wall or leave an air gap?

...air while the front of the house is underground. My question is should I apply 2 inch foam board to the inside of the wall or leave a gap for air? I understand ...

Posted by Elijah Hargett Jan. 9, 2021, 5:31 p.m. Foundation and basement improvements 4 Responses

Can you insulate a concrete block basement walls with only rockwool?

...airspace. The point being, if you leave an airspace and the wall is not sealed, sounds to me there is a chance you may have an air convection behind the wall. T...

Posted by Aarne Valikangas Jan. 1, 2021, 9:22 p.m. Basements improvements 1 Responses

What is the best way to deal with a drop ceiling in a high humidity room?

...sealed (no air barrier) and this portion of the room is below grade and cannot be vented and do not want to rip off the roofing. One suggestion was to put 1/2 i...

Posted by steve Roberts Dec. 24, 2019, 8:01 p.m. Walls and ceilings - interior surfaces 1 Responses

Basement reno - How do I effectively insulate my basement?

...seal the edges and then rockwool. Is there a difference to the order? Also if I wanted to air seal this area could some type of caulking also be used directly...

Posted by Steve J Feb. 13, 2019, 10:25 p.m. Foundation and basement improvements 2 Responses

Should you seal all rods and penetrations for a radon barrier?

...sealed is an important part of radon mitigation, but it is for sure secondary to the floor. Is there a barrier below the slab floor? And did you have the air le...

Posted by D H Dec. 25, 2020, 9:08 p.m. Healthy indoor air quality 1 Responses

What's the best way to seal a crawl space and insulate?

Hi I was wondering what's the best way to seal a crawl space and insulate? Currently it is a vented space. Should the vents be closed permanently? The floor jo...

Posted by Steven Johnston Feb. 23, 2021, 12:35 p.m. Crawl spaces 1 Responses

What is the best way to seal around windows?

...seal it with tape on the inside? Any suggestions will help. A good place to start is our page about How to Install Windows & Doors Correctly that includes a DIY...

Posted by Bryan Squirrell Oct. 8, 2019, 8:53 p.m. Windows and doors 1 Responses

What is the best way to insulate rim joists with EPS and batts?

...air seal, you may want to actually do that first, which could be a simple matter of applying caulking or acoustic seal to the rim joists to stop air leakage whi...

Posted by Steve J July 18, 2019, 3:53 p.m. Basements improvements 1 Responses

What is the process to seal a house using Aero barrier spray?

...seal? The Aerobarrier air barrier spray you likely read about here does not stick to vertical surfaces, but it does fill all the holes (up to a certain size), s...

Posted by Santiago Pacheco Feb. 13, 2020, 11:06 a.m. Air and vapour barriers 3 Responses

Is it possible to reconcile installing a wood stove in a airtight, super-insulated house?

...airly confident the air barrier continuity can be maintained but when the stove is not in use it would represent a significant heat loss. We talk a lot about ai...

Posted by rick seward Dec. 23, 2018, 2:49 p.m. Wood stove and biomass heat 1 Responses

How do you fix ice dams and crawl space insulation in historic homes?

...seal crawl spaces That should tell you all you need on that topic, and yes, it's best to insulate and protect your crawl space from moisture damage. Here is o...

Posted by Faith K Feb. 26, 2021, 1:43 p.m. Roof assemblies - renovation 2 Responses

Can I spray foam insulate from the outside?

I bought an old timer home on Gibsons, BC and the siding needs replacing. I want to use the opportunity to seal up and insulate the wall cavity once exposed. I...

Posted by Kurt Klischuk June 6, 2019, 8:56 a.m. Wall assemblies - renovation 3 Responses