Hi all!

I have some doubts about how to calculate the surface area that contributes toward this credit. 

At least 75% of all wall panels, by cost or surface area, meet the VOC emissions evaluation, the same with insulation. Ceilings and flooring 90%.

My doubt comes when I start calculating surfaces area.

Should we calculate the planar area for each exposed side of the interior material planes (insulation, ceiling, wall panels, etc)?