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Old 03-10-2012, 02:06 PM   #1
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DIY Foam Insulation


Has anyone ever tried doing their own foam insulation? They do sell kits for homeowners, a little expensive. One brand is Tiger Foam.

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Old 03-10-2012, 04:18 PM   #2
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DIY Foam Insulation


Look on You Tube, there are a million videos.

What are you looking to do? For my rim joists, i just cut pieces ox XPS to size and caulked the edges and used Great Stuff on top of that. More time consuming but less expensive.

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Old 03-10-2012, 04:29 PM   #3
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DIY Foam Insulation


Beepster -

I did the same system, but opposite and cut the 2" XPS roughly close (a little small), applied the foam around the rim /joist cavity and quickly shoved the XPS in and let the foam seal and glue it in place. It has performed well. - I hate to cut precisely, when foam can make up for the variations.

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Old 03-10-2012, 06:52 PM   #4
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DIY Foam Insulation


Beepster, good job. Double protection for when the foam air seal breaks- even 1/16", the caulking (and backer rod = A+) will still stop air, as it moves with the solid wood. Canned foam can take no movement...

Engineered wood- no worries, it won't expand and contract from the changing seasons- from 6-12% R.H. = 3/8 to 1/2" depending on the rim width: http://www.buildingscience.com/docum...d-but-strange/

Page 51: http://books.google.com/books?id=iwS...rafter&f=false

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Old 03-16-2012, 03:28 PM   #5
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DIY Foam Insulation


Quote:
Originally Posted by Beepster View Post
Look on You Tube, there are a million videos.

What are you looking to do? For my rim joists, i just cut pieces ox XPS to size and caulked the edges and used Great Stuff on top of that. More time consuming but less expensive.

B
I've thought about doing this between the rafters in my unvented attic. Any idea how well this would work?
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Old 03-16-2012, 05:10 PM   #6
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DIY Foam Insulation


Just a sort of anti-DIY comment I guess. I have found having the pro foam spray guys do the job so much cheaper. Of course it is near impossible to get them out for a little job but I have found if you can be schedule flexible they can be very cooperative.

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