Question from Tycho
In terms of formaldehyde emissions, is CDX plywood a safe choice as a subfloor in a residence? I’ve heard that CDX plywood (also called exterior grade plywood, I believe) only contains phenol-formaldehyde (not the more toxic urea-formaldehyde) and therefore is a good choice for a subfloor underneath a hardwood floor. According to my local lumber yard, regulations here in California have all but eliminated formaldehyde from CDX plywood. I’d be grateful for any relevant information.
Debra’s Answer
My understanding is as you state.
