Attic Concrete Chimney Fire Block

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.

Attic concrete chimney fire block.

And accepts an 8 in. Include drywall facing the chimney. Concrete chimney block measures 16 in. 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.

A masonry chimney can be made up of a variety of materials including bricks mortar concrete block stone flue tile cast iron and steel. Chimney fire clearance distances between masonry wood framing. Requirements for masonry chimney attic fire block. I put my fire block 1 2 drywall in first then caulked with fire resistant caulk to fill gaps along the concrete wall.

Material for fire blocks. Features a hole in its center. Surround the chimney with four stud walls that you pre assemble on the floor of your attic. This article describes the fire clearances required for masonry chimneys.

I then built my walls and nailed them in place. Space the drywall an inch away from the chimney. 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. 1027 jefferson ave utica ny 13501.

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. Suitable for use with chimney liner. 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. The blocks must be as wide as the wall.

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. For use with 8 in. The center hole allows you to install chimney liner not included.