Frost on concrete foundation interior wall

1/8/2021 at 2:22:09 AM

Hello from Winnipeg. Dont sweat it its common we see it all the time. When insulation is pushed against frozen concrete wall it will also freeze to it and the frost when it gets warm melts. Please read article. Yes vapor barrier will help stop inside humid air from getting behind wall but in wpg its the cold air getting in pourius concrete wall.

1/8/2021 at 9:35:09 AM

hello:

vapor barrier and insulations only work together hand in hand..

make sure you have a snug insulation in all spaces and a vour vapour barrier is continuous, sealed and is only on the warm side in side of insulation or it will sweet and condensate water

also need r 12-20 insulation to help problem also mositure can be from too high inside humidity and or (less likely) coming in from outside

1/8/2021 at 10:09:18 AM

Hi, you should pay the attention outside the foundation wall.

You need a waterprooding outside the foundation wall and inspection of your french drain, to sold the problem completely. Hopefully I answered your question.

Thank you

SAM & FILS

MONTREAL