Basement wall insulation / Discussions

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

...basement renovations we try to always point out that you should never put a vapor barrier on an interior basement wall unless you are trying to grow mushrooms inside the wall. Read here about why basements are moldy and how to prevent mold when finishing a basement

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

How do you insulate a basement slab to keep the benefits of thermal mass in a passive solar home?

...wall, is that the case? Perhaps you just mean foundation wall and are not referring to a frost wall. If you are in fact building a slab, stem walls are a very costly and unnecessary component, here is our slab on grade best practices DIY building guide page. The only reason to build stem walls / frost walls is to get b...

Posted by Trudy Lynn Oct. 25, 2024 Passive solar home design 1 response

What type of insulation should I use between basement floor joists?

...basement walls in between the floor joists of the upper floor. I am thinking some panels sealed in with insulation foam adhesive  For insulating the floor joist cavities in basements, you can use foam panels and you suggested. It can be busy work with a lot of cutting, but it works well and it is a lot cheaper and heal...

Posted by Ninja Ho Aug. 2, 2023 Basements improvements 3 responses

How do you stop moisture and mold from forming behind drywall in a new basement?

...insulation not being installed in the joist box ends. There was a shower of moisture running down the wall in certain areas all along the concrete wall in the entire basement. The builder fixed this defect by January 2021. In July of 2021, after an excessively hot summer, I found mold again in the same northwest bedroo...

Posted by Keri Peters July 12, 2022 Basements improvements 3 responses