- Joined
- Mar 3, 2017
- Messages
- 743
[and OSB facing the shop area}...in the clean area; I will use "1/4 sanded plywood there and apply some semi-gloss poly., I've got a bunch of Zinser primer and a 5gal bucket of semi-gloss white
Consider a fire-retardant paint, OSB-side especially. Vertical surfaces of non-fire-retardant material are potentially a fire hazard,
and your addition to the building might not have the same (?'one-hour') rating of the exterior construction (which is a regulatory no-no).
Sanded plywood isn't intended as wall covering, might not have ANY fire rating. The OSB used as building sheathing
could be rated, but a shop-side fire might get scary before the office occupant notices.