Condensation in basement insulation / Discussions

Why is there condensation behind my vapor barrier?

...ing the loft over my work shop into an apartment and insulating the walls and roof with Rockwool insulation with a plastic vapor barrier and then drywall today while putting up drywall noticed that the vapor barrier is covered with condensation how do I stop the condensation. Have put a halt to this project until I can...

Posted by John Young Oct. 11, 2021 Wall assemblies - new construction 1 response

Will spray foam on basement walls prevent condensation?

...inst it, condensation will form. Installing polyethylene vapour barriers is the worst thing you can do in a basement. Putting organic materials such as wood against a wet concrete wall, then covering it with a sheet of plastic will only ever result in one thing – wet, rotten walls. Why this was allowed to go on as long...

Posted by Michael Scott April 12, 2021 Basements improvements 3 responses

What is the best way to insulate interior basement walls that are sweating?

...insulation to the interior, my walls are sweating.  So I know I have air getting in behind that insulation hitting the cold concrete walls, creating the sweating issue.  I thought I had everything sealed up well but then I just created ice behind the insulation.  So now, I am looking at possibly adding foam board with ...

Posted by Chris B Feb. 15, 2022 Foundation and basement improvements 1 response

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

...basement windows before he installed the insulation in the basement.  Subsequently it probably rained and moisture got in through the unsealed basement windows.  Now, I can see the condensation on the inside of the vapor barrier i.e. the side closest to the insulation.  The vapor barrier is dry to the touch from inside...

Posted by David Mitchell Aug. 14, 2018 Basements improvements 62 responses