I'm working on installing a left-hand drain tub against a firewall, specifically using 5/8" greenboard on both the back and left walls for fire safety. Since I'm in a basement and the walls are exposed down to the studs, I realize that once I put up the greenboard, accessing the tub's drain and overflow will get tricky. To pass the rough-in inspection, I'm considering cutting an access patch around the drain and then patching it up with glue afterward. Do any of you have suggestions for better ways to do this? Also, I have access to both sides of these walls, making it easier to reach in if needed.
2 Answers
Just a heads up, make sure you're using fire-rated materials correctly. 5/8" greenboard is intended for moisture resistance, while you'd generally want Type X drywall for fire safety. Definitely double-check your local codes. As for access, cutting an access panel is a common solution, but if you can keep the panel removable, it makes future jobs a lot easier! That way if you need to service the drain later, you won't have to cut again.
Yeah, if you need to do any maintenance later, having it easily accessible will be a lifesaver.
If you're set on cutting a patch, just ensure you seal it properly to maintain the integrity of the firewall. You might want to use some fire-rated caulking after patching it up too. Also, consider using access panels specifically designed for this purpose; they're easy to install and look good too!
Access panels are smart! They can make things a lot simpler in the future if you ever need access again.
And they save you from having to cut drywall every time you need to check the plumbing!

Great idea about the removable panel! That would save a lot of hassle down the line if anything goes wrong with the plumbing.