I'm hoping someone has found a good pathway for wood ceilings in LEED v4 and can share. The CDPH test includes a formaldehyde test which of course all wood contains. The wood ceiling manufacturers I've talked to won't test their products for CDPH because of the inherent formaldehyde. I have testing results for the CARB tests and feel that we should be using Group 3 and Group as appropriate for wood ceilings. My initial LEED coach response was tone deaf to the issue and didn't seem to understand the formaldehyde in wood as a basic issue. Otherwise, I'll be submitting something more formal to USGBC which will likely cost money for an known issue and that is frustrating.