Epdm roofing | Ask Mason Knowles - SPF Consultant | Spray Foam Technical Questions and Answers | SprayFoam Magazine Q&A Forums

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glenngamblin Posted: Apr 04, 2017 08:02 PM	Epdm roofing I have a epdm roof that the owner wants sprayed but only if the liner is not removed. if the liner is properly anchored will the spray foam properly adhere if it's spotless clean?
mason Posted: Apr 12, 2017 09:55 PM	Foam has a problem adhering to EPDM without a primer. A single ply membrane does have to be securely fastened to the deck in order for the foam to be dimensionally stable. Plus EPDM tends to shrink as it gets older, so you need to take that into consideration. I would have to inspect the roof to make a recommendation. Ask your supplier if they can take a look at the roof and provide an opinion and if they would warrant it.

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Comments

glenngamblin

Posted: Apr 04, 2017 08:02 PM

Epdm roofing

I have a epdm roof that the owner wants sprayed but only if the liner is not removed. if the liner is properly anchored will the spray foam properly adhere if it's spotless clean?

mason

Posted: Apr 12, 2017 09:55 PM

Foam has a problem adhering to EPDM without a primer. A single ply membrane does have to be securely fastened to the deck in order for the foam to be dimensionally stable. Plus EPDM tends to shrink as it gets older, so you need to take that into consideration.

I would have to inspect the roof to make a recommendation. Ask your supplier if they can take a look at the roof and provide an opinion and if they would warrant it.

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