Pros and Cons of different types of expanding foam for air sealing?
Kevin Lauscher| Posted inGreen Products and Materialson
Hey there. I saw that in the last issue the magazine they did a “tape off” between the different types of tapes. Has there been anything like this for expanding foams used for sealing? There are quite a few on the market between the different brands….
I am asking because I need a foam for sealing between XPS and wood ceiling rafters. I would like something that is flexible due to the expanding and contracting as well as living in an earthquake prone area.
Any links for discussions on this?
GBA Detail Library
A collection of one thousand construction details organized by climate and house part
Search and download construction details
Replies
Kevin,
I have never heard of such a test, but I doubt if there is much of a difference between brands.
You are right to be skeptical of the ability of spray foam (whether one-component foam or two-component foam) to maintain a long-term air seal in this location.
One of the high-quality European tapes (for example, Pro Clima Tescon No. 1) is likely to perform better in this location -- but it's pricy.