Recommended concrete moisture levels for spray foam
Karrj
| Posted in GBA Pro Help on
I have a poured basement poured 6 months ago bituthene on outside walls. House recently dried in heat in basement has been on for 2 weeks. Moisture content 70% done by drilling holes and placing probes in concrete. Some surface readings done by laying a moisture meter on surface of concrete as low as 30%. Basement stud walls in place ready for spray foam. At what moisture content (and how should it be measured) can closed cell spray foam be applied?
GBA Detail Library
A collection of one thousand construction details organized by climate and house part
Search and download construction details
Replies
Just to be clear, you're talking about moisture content as a percentage, and not the relative humidity inside the concrete, correct? If so that's very wet still.
Which probes are you using?
Yes moisture content as a percentage using a moisture meter. We used a moisture meter that rests on the surface of the concrete and had readings from 30 to 58% highest readings at
The top of the wall. Borrowed a moisture meter from flooring contractor they use before installing floors where you drill about an 1/2 to 1 inch
And place a probe and reading 70%
Yes moisture content as a percentage using a moisture meter. We used a moisture meter that rests on the surface of the concrete and had readings from 30 to 58% highest readings at
The top of the wall. Borrowed a moisture meter from flooring contractor they use before installing floors where you drill about an 1/2 to 1 inch
And place a probe and reading 70%