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FAQs about IEQc4.1 :

Is there a shortcut to the VOC budget method if you have just one product that is used minimally on a project?

Do products applied to the weather barrier need to comply with VOC thresholds?

How do I determine what application my product falls under?

How is VOC % less water determined for aerosol adhesives?

Do grout and caulking need to be included, and if so, what is the application category?

Our project didn't use some common adhesive types, and our LEED reviewer asked about this. Are we supposed to justify not using certain adhesives in our documentation?

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CS-2009 IEQc4.1:Low-Emitting Materials—Adhesives and Sealants

Silicone sealant for glass block installation

Dear all, Does the silicone sealant used for the glass block installation need to comply with the maximum VOC requirements of this credit? if it does, it includes in which type of adhesive, is it structural glazing or special purpose contact adhesive or what? please comments on this. Many thanks,

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Profile picture for user emilycatacchio
Emily Catacchio
Sustainability Specialist
Wight and Company
LEEDuser Basic Member
415 thumbs up

Sun, 11/27/2011 - 03:57

Is the sealant inside of the weatherproofing system and applied on-site? If so, then it does need comply. I don't have experience with this particular product, so perhaps someone else knows where this would fall?

Wed, 11/30/2011 - 03:34

I don't know the meaning of inside the weatherproofing system, but the silicone sealant will be applied on site and it will used inside and outside of the building (glass block installed on wall, between indoor and outdoor)
Profile picture for user emilycatacchio
Emily Catacchio
Sustainability Specialist
Wight and Company
LEEDuser Basic Member
415 thumbs up

Wed, 11/30/2011 - 14:29

Inside the weatherproofing system means within the space people will be occupying, inside the water, vapor, or air barrier(s). So this would qualify as inside the weatherproofing system. Thus I would say it does need to comply with the VOC regulations, but I'm still unsure which category it would fall under.Anyone else?
Profile picture for user petr.lhotak
Petra Hajná
Sustainability Consultant
Skanska Czech Republic
LEEDuser Basic Member
128 thumbs up

Thu, 12/01/2011 - 11:50

If it looks like this: http://www.ceskestavby.cz/clanky/luxfery-ktere-izoluji-teplo-18928.html I'd say it can/should be considered "Multipurpose construction adhesive" with limit 70g/L. Can anybody confirm?
Profile picture for user tristanroberts
Tristan Roberts
Representative
Vermont House of Representatives
LEEDuser Expert
7780 thumbs up

Sun, 12/18/2011 - 05:59

Petr, I would say that the adhesive there is part of the weatherproofing system, and the VOC level you quote seems appropriate.

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