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Covering over Gypsum, insulation adhesion question.

3K views 4 replies 4 participants last post by  tetondreams 
#1 ·
Hello everyone, I have a quick question for everyone. We did a core sample on a flat roof showing the main deck having gypsum substrate on an older building. My question is has anyone else had the opportunity to EPS over a gypsum base before. Secondly, what adhesion system did you use to get your insulation to adhere? Thanks in advance, the forums are excellent.
 
#2 ·
Can't talk super intelligently because we don't use a lot of eps here in florida. But polyiso sticks to hard/dry gypsum very well in low rise insulation adhesive. therefore eps probably would too.

You may reach out to your manufacturer to see if they have a tested/approved assembly using eps over gypsum in low rise adhesive.
 
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