What do y’all suggest these days for spray foam on a barndo? 6 years ago on my Dads barndo we did 2 inches closed cell and it worked great. I am getting bids now and some are suggesting spraying 1 inch closed cell with 3-5 inches open over it.
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I am getting quotes on barndos now and two of the contractors told me they would rather do batt insulation on the roof and spray insulation on the walls. Both also told me that some insurance companies will no longer insure a spray foam insulated roof on a new build. I have not contacted the insurance company yet to verify this.
I am under the impression that a roof leak is hard to pin point with spray foam insulation, but I can only relay what the contractors have told me. -
I did foam in a barndo last year. Never again. Save your money and go with batt insulation. That **** is way over hyped.Comment
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We went with 6-8 inches of open cell on our roof and love it.Comment
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If you have experience with what your Dad did and like it, go with what you know.Comment
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Would you mind explaining why you do not like spray foam? I have spray foam in our stick built home and would like to know what to keep an eye out for troubles. Thanks in advanceOriginally posted by CabezaBlanca View PostComment
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I’m also wondering what to look for. I’m building a house and had 4 inches of spray foam. Please explain what to look for and problemsComment
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I moved into a new 2400sqft home all spray foamed in November. It insulates the house incredibly well. During our cold spells here in the hill country. We had a few 20degree nights and forgot to turn the heat on before we went to sleep and woke up with just about 2 degree difference in temp. The 100 degree heat will be the big test come summer time.Comment
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I don’t think you will be disappointed in the summer either from our experience.Originally posted by Tony Pic View Post
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On a roof leak the water can get in between the metal roof and the foam,the water can come out a long ways from where the leak is actually at.Originally posted by glen View Post
One contractor said it is a real mess once the metal starts rusting under the foam and the quality of the metal screws is not what it used to be. I have no idea about a shingle roof, as I am getting quotes on all metal.
You might call your insurance company and inquire about coverage.Comment
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I've asked about what happens when you get a leak on every thread started on here, and nobody has ever responded. I guess it took the insurance companies to wake people up to the mess it creates if there is a leak. To me it's not if there will be a leak, it's when. Especially on a metal building.Originally posted by Radar View PostComment
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I've had 2 leaks on ours it was pretty easy to find and fix. Cut away the foam found the leak and then fixed. Pretty simple. Until my rates went up this year I never had a electric bill over 130 bucks. 2400 Sq ft and keep it 68 at night and 71 during the day. We've been in ours for around 8 years nowComment
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We used open cell and were told to use open cell on the roof just in case there was a leak. Unlike closed cell its pretty porous and the water will come pretty much straight through instead of spreading out. We went with 6-8 on the roof and 6 in on the walls. I have a hard time believing insurance companies won't cover a house because it has spray foam. We've never had a problem neither has anyone I know that has spray foam.Comment
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If you’re worried about roof warranty, spend a few extra thou and put plywood between metal roof and foam.
Closed cell benefits is can be 2x the r value of open cell, and it’s more robust /rigid in nature. Also acts as vapor barrier. Multiple layers usually.
open cell benefits is it expands so much it can reach and fill all the gaps and voids. Also excellent sound proofing. Single spray layer usually.
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