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NC-v4 EQc2: Low emitting materials
April 26, 2020
I would like to know if EPDM for roof has VOC content or not. As per the VOC calculator it stated that waterproof membrane limit is 250 g/l.
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218 thumbs up
April 27, 2020 - 2:14 pm
Waterproofing membrane is not necessarily on the roof. Don't believe the VOC requirement applies to EPDMs, except for any adhesive used.
3 thumbs up
April 27, 2020 - 4:03 pm
VOC content is only applicable to on-site wet applied materials. So VOC content is not applicable to an EPDM membrane; however, the adhesive and sealant would need to be compliant for Healthcare, or School projects.
I think it would fall under - "Single ply roof membrane adhesives" - 250g/L.
April 28, 2020 - 12:10 pm
Jack, wouldn't the emissions and VOC content requirement generally apply to all projects, not just schools and health care, since the adhesive or primer is applied inboard of the membrane?
April 28, 2020 - 1:03 pm
My understanding: That the adhesive and primer would be considered inclusive to the weatherproofing system, as they are an essentail component for the integrity of the system as a whole. They are also located between the primary and secondary weatherproofing membranes.
"The building exterior is defined as everything outside and inclusive of the primary and secondary weatherproofing system, such as waterproofing membranes and air- and water-resistive barrier materials." - BD+C V4 Low-Emitting Materials.
I have also attached a link to this topic in another forum. It is older, but has some great discussion on if adhesives for membranes are considered interior/ exterior.
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