Cinder block foundation / Discussions

Does 2" EPS foam board on basement walls cause concrete freezing issues?

...foundation walls will remain wet unless they are completely separated from ground moisture with moisture protection measures. And yes, concrete will freeze, but it is more block foundations where freeze\thaw can cause structural problems. The vast majority of basements in cold climates are insulated on the interior and...

Posted by Gar Wia June 16, 2025 Basements improvements 1 response

How do you properly insulate a cinder block foundation walk out?

...cinder block instead of 2x6. I am framed out about two inches from the foundation and I am in Zone 4. Should I apply a foam board to the interior cinder block walk out area or can I use Faced r-13 throughout the basement walls ? A cinderblock / CMU / concrete block foundation is not as strong as poured concrete, and in...

Posted by John Smith Nov. 17, 2022 Basements improvements 1 response

Can you Insulate a cinder block basement foundation with Rockwool?

...Cinder Block Foundation from the interior using Rockwool, here are the factors we would prioritize and how we would do it. First, the three main rules of durable basement construction are – water management, insulation, and airtightness. Our first suggested assembly for interior basement insulation would be a vapor bar...

Posted by Victor B June 19, 2019 Basements improvements 6 responses

What is your opinion on filling block foundations with concrete?

...cinderblock foundation walls in the basement.  We’ve got a minor crack in the grout, and we were advised to fill the block with concrete for strength, in addition to repairing the grout.   Thanks in advance  Hi Nina,  That's a structural question that we would be unable to answer unfortately, since a crack in a block f...

Posted by Nina Hartt March 21, 2019 Foundation and basement improvements 1 response