Air seal / Discussions

Can you provide Crawlspace Insulation Design Assistance?

...air. Humid air not feels cooler, but heating humid air requires more energy than heating dry air. So that 6-mil poly membrane is essential above all else for co...

Posted by Randy Christensen Dec. 10, 2019, 12:17 p.m. Crawl spaces 1 Responses

Can you install foam boards directly against basement walls?

...Airboard ), then they were taped to really seal them up - before and after readings on the humidity were like night and day, and the temperature with zero addit...

Posted by Ted Gorab Oct. 3, 2019, 6:09 p.m. Basements improvements 15 Responses

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

...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 (it’s not necessarily ...

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

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

...air as the cellulose is blown, eliminating the need for the insulaweb material, as well as vastly reduce the air borne dusty mess. Can you please elaborate or s...

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

Should I bother testing for radon in a gutted and uninsulated house?

...airs and then test it, or, just run with the assumption that you may have it and take the pretty affordable steps ahead of time just in case, read more here – ...

Posted by Luba Sharapan March 27, 2021, 12:04 p.m. Radon in Homes - Mitigation 3 Responses

What are the most cost-effective green building strategies in new home construction?

...air-sealing of the envelope – Absolutely, make a home as well-sealed as you can and let your ventilation equipment do their job. A poor air barrier and lots of ...

Posted by M T Nov. 4, 2019, 11:07 a.m. Concept and design 3 Responses

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

...air from getting back there. If you don’t allow air to flow behind it then they would be small pockets of air behind the center of panels, which wouldn’t be a p...

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

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

...sealed air chambers while keeping the window lighter than had you installed triple pane glazing.

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

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

...air the studs, put in rockwool for the last foot or so of insulation, put drywall back up and call it a day. Save money to redo the whole assembly. My questio...

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

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

...air circulation behind the vapor barrier when furnace fan turned on. Isn't the vapor barrier there to stop warm air from inside home reaching cold air in the wa...

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