Go Back  DoItYourself.com Community Forums > Interior Improvement Center > Walls and Ceilings
Reload this Page >

Enclosing masonry fireplace, required clearance

Enclosing masonry fireplace, required clearance

Old 11-07-17, 11:21 AM
Thread Starter
Join Date: Mar 2009
Location: Northern Virginia
Posts: 3,914
Received 27 Upvotes on 21 Posts
Enclosing masonry fireplace, required clearance

I've read the code regarding masonry fireplaces and the minimum clearance from combustibles, which is 2" on the front and sides, and 4" from the rear face. My question is, is type x drywall considered combustible? I'm trying to keep the wall as close to the fireplace as possible. I'd like to use metal studs laid flat against the brick, then type x over. I found one reference to gypsum being considered "limited combustible", but no answer as to whether the 4" rule applies. Is this sort of thing left open for interpretation by the inspector? If we're being extremely literal about it, if gypsum is limited combustible, then it isn't combustible.

Just got off the phone with the county and they said type x gypsum is not considered combustible. So I can glue it directly to the brick if I wanted. I'll be going the metal stud route though. Also, it sounds like 2" clearance from the chimney portion is required from framing members, but the sheathing can but up against it.

Last edited by mossman; 11-07-17 at 12:24 PM.

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: