Air sealing rim joists / Discussions

Can I use a dimpled membrane and Isorad panels for basement wall insulation?

...rim joist, closed-cell urethane is the industry standard for air sealing and insulating that specific area, as it prevents warm interior air from condensing against the cold wood and concrete transition. Rim joists are tricky we don't love spray foam and try to avoid it, but it does work well in that situation. Last no...

Posted by David Perreault May 1, 2026 Basements improvements 1 response