Forum discussion
NC-v4 EQc2: Low emitting materials
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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Are throw rugs subject to the credit requirements?
What are the adhesives and sealants to be included in the documentation?
Is there a VOC budget method for this credit?
What are the limits on the VOC budget method?
Do products applied to the weather barrier need to comply with VOC thresholds?
If one part of my multicomponent wall system is not compliant, can I still get full credit?
Deborah Lucking
Director of SustainabilityFentress Architects
LEEDuser Expert
258 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.
Jack Statham
Lean & Sustainability SpecialistChandos
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.
L W
1 thumbs up
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?
Jack Statham
Lean & Sustainability SpecialistChandos
3 thumbs up
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.
Low-Emitting Materials:
"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.
https://leeduser.buildinggreen.com/forum/single-ply-roof-membrane-adhesives