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How to block attic vents prior to spray foaming Post New Topic | Post Reply
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Summit3309
Posted: Oct 27, 2015 02:31 PM
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How to block attic vents prior to spray foaming
Are there any materials or techniques that are recommended for blocking a vented attic system (soffit vents, ridge vents, gable vents, attic fans, ect.), prior to spray foaming / encapsulating an attic? What are best practices for this scenario? |
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jimcoler
I have over 10 years of experience specifying and installing open and closed cell spray foam. I've sold my business but I'm still selling for the new owners and consulting on large and custom specific jobs. I've expanded my knowledge into t Posted: Oct 27, 2015 04:11 PM
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We always keep a roll of "filter-glass" insulation on hand in our truck or trailer which has been very useful for this purpose. It doesn't need to be kraft faced either. We just cut it a little over sized and stuff it in the cracks, gaps, and holes and then we spray to it. It fills most of the gaps within the filter-glass and seals the air out. For some larger areas where we can't use filter-glass, we use Low-E Reflective insulation and spray to this. It's a great option which can separate conditioned vs non-conditioned attic spaces. It a flexible product and can be formed or wrapped around whatever you want and it helps fill larger gaps or holes. Hope this helps! Jim |
