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Discussion Starter · #1 ·
Hello:


Please have a look at
http://www.bobgolds.com/Vapor/home.htm


(to see pictures of the rest of the basement, feel free to look at http://www.bobgolds.com/Basement/home.htm )


I've resolved some of the Vapor Barrier issues along that wall, the only wall that's an outside wall, but I'm not sure how to create a vapor tight seal near the i-beam at the top center of the wall.


I would appreciate any suggestions, or pictures of other people's solutions.



EDIT: website updated. I may have solved my own problem, but I'd still appreciate any pictures or ideas of anything that someone has done that's similar, or suggestions of a better way.
 

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Discussion Starter · #3 ·
BIGmouthinDC:


I was thinking of that, but

a) expanding foam isn't good for soundproofing, and I'm trying to decouple the proposed walls/ceiling from that i-beam. I figure that if that i-beam vibrates, then so will the rest of the house, and it's steel so it'll vibrate like a guitar string.

b) the i-beam moves when people walk on it, so very quickly (less than a month) it wouldn't be air tight, and certainly not water vapor tight.

c) How do I fasten poly to expanding foam in a way that doesn't break the foam?

d) building code requires the poly be attached to something solid (and covered/protected).
 

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There are 2 kinds of foam cell structures, open cell and closed cell. A closed cell foam wouldn't need a vapor barrier. In many places, there is a requirement that foam be walled in though.
 
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