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NC-2009 IEQc4.2: Low-Emitting Materials—Paints and Coatings
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Material VOC vs. Coating VOC?
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Emily Catacchio
Sustainability SpecialistWight and Company
610 thumbs up
January 26, 2012 - 6:45 pm
Ellen,I actually touched on this in an article on BuildingGreen last March. If you have a BuildingGreen account you can view it here. If not this explaination is helpful.
Ellen Mitchell
331 thumbs up
January 27, 2012 - 9:49 am
Thanks Emily, that is very helpful. I had sort of come to the conclusion that material VOC was the number to use, but I appreciate the confirmation.
Lindsey Evans
Architectural DesignerPGAV, Inc.
19 thumbs up
February 7, 2012 - 4:19 pm
Emily,
After reviewing the MACLAC document, I am still left with questions involving this topic. I do not have a BuildingGreen account.
Under Credit IEQ 4.2 in LEED 2009 BD+C, Table 1 states the Standard VOC limits. In parenthesis at the top of the table it says "g/L minus water, minus exempt compounds."
This makes it sound like the limits are measured after all the water and exempt solvents are mathematically subtracted.
However, the Material VOC does not measure the VOC content with all the water and exempt solvents subtracted. It seems using the Material VOC would not be an apples to apples comparison.
Why wouldn't I use the Coating/Regulatory VOC number where the water and exempt solvents are subtracted?
Thank you much!