Attic Concrete Chimney Fire Block

Concrete chimney block measures 16 in.

Attic concrete chimney fire block. Lee the building code requires fireblocking to cut off the passage of fire within concealed spaces in a building of combustible construction including the space around a chimney where it penetrates floors and ceilings. Cracks in a masonry chimney particularly concrete block chimneys are often caused by chimney footing tipping or settlement inadequate foundation frost poor drainage missing rain cap porous masonry improper construction in freezing climates thermal expansion of the clay flue liner improper construction. The distance between a brick stone concrete block or other masonry chimney and the nearest combustible material such as wood framing is an important fire safety consideration that must be respected. Material for fire blocks.

I then built my walls and nailed them in place. Assuming you don t want to change your plans or if the chimney is already built then it is perfectly possible to insulate the chimney as it passes through your attic. Features a hole in its center. For a 2 x 4 wall use a 2 x 4 block for a 2 x 6 wall use a 2 x 6 block.

I used a 6 level and a straight 2x4 to determine how wide to cut my drywall fire block so that i would not have to trim the drywall after the walls were in place. Suitable for use with chimney liner. Space the drywall an inch away from the chimney. I put my fire block 1 2 drywall in first then caulked with fire resistant caulk to fill gaps along the concrete wall.

The 2012 international residential code allows for the use of materials other than standard lumber although i do not recommend any of them. Chimney fire clearance distances between masonry wood framing. 1027 jefferson ave utica ny 13501. And accepts an 8 in.

Requirements for masonry chimney attic fire block. If you do have another fireblock with listed firestop installed at the attic floor level you ll need either an attic insulation shield around that chimney pipe or better yet seal off that opening with t ply so the chimney is no longer visible. The blocks must be as wide as the wall. The major reasons behind chimney issues will definitely vary but in this article we ll cover their most common problems and the causes.

The center hole allows you to install chimney liner not included. This article describes the fire clearances required for masonry chimneys. Include drywall facing the chimney.