I have a client that would like to double up on 5/8" type x throughout the entire garage. Is that really effective? I can't see how having 2 layers will give you 2 hours of protection opposed to 1 hour.
New to the forum but have seen a lot of helpful info as a lurker here. Look forward to getting to know you all better.
We're doing an exterior firewall on a steel building right now as required by city code. Using 5/8" exterior gyp sheathing that needs to be firetaped. Traditionally...