We are looking at spray foam and whether we will be able to use it without an ignition barrier in crawlspaces or attics. The initial opinion is not unless it meets ASTM E 84 with less than 25 flame…Continue
"When we use this product we place a laminated technical data sheet in the given area and give the home owner a copy to keep with their receipt to show any one that may ask what the product is and that it does not need to be covered with a fire…"
The E-84 only test has was removed from the IRC between the 2003 & 2006 code cycle. The exceptions you are speaking of are for THERMAL barriers not ignition! You need an ignition barrier unless the specific foam you are using…"
"Thanks. The foam plastic section of the IRC 2009 code has specific exemptions for attics and crawlspaces that allows the ASTM E-85 qualified foams to be sprayed without a thermal or ignition barrier, as long as the spaces are not accessed for any…"
"Cory is right, watch out for thermal barrier requirements as well. In it's simplest form if you can walk up to it on any given day it will require a thermal barrier. if it is harder to get to you will need an ignition barrier. …"
May 11, 2012
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May 4, 2012
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"Watch out for thermal barrier requirements in addition to your ignition barrier concerns. If a crawlspace is open or has access to a basement their may be code enforcement issues with some crawlspaces. To deal with this the choice is to not use foam…"
"I do not have a full cavity foaming rig, but when I do I sub the work out to a subcontractor. He carries a full cavity open cell spray foam product that is fire rated and does not need to have an ignition barrier on it. The product is…"
We are looking at spray foam and whether we will be able to use it without an ignition barrier in crawlspaces or attics. The initial opinion is not unless it meets ASTM E 84 with less than 25 flame spread and 450 smoke density. Meaning, only fire retardent foams will be permitted unless you want to spend the money on ignition barriers. Have you had any code enforcement officials enforcing this yet? How are you dealing with this issue? Do you use any foam on ductwork in unconditioned spaces.
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