How to Cap a Brick Chimney

A chimney cap is a protective covering that fits over the top of a brick chimney.
Caps can be installed on brick chimneys.Caps can be installed on brick chimneys.
Chimney caps are typically manufactured from stainless steel, copper or galvanized metals. Some caps are designed with a mesh screen that helps capture airborne sparks that rise up from wood stoves and fireplaces. Mesh-screened caps also keep birds and bats from nesting within the chimney. Once you're on the roof, you can install a chimney cap with a few tools in less than 30 minutes.

Step 1

Measure the outer width and length of the chimney, using a measuring tape. If the brick chimney is fitted with a tile flue pipe, measure the outside of the flue pipe. You'll need these measurements when selecting the chimney cap.

Step 2

Set the chimney cap in position over the brick chimney or flue pipe. If the clamping bolts on each side of the cap interfere, turn them counterclockwise by hand until the cap can slide in place.

Step 3

Tighten the four clamping bolts by hand to hold the cap in position. Check the cap's orientation with a torpedo level. Make any necessary changes to ensure that the cap is set correctly.

Step 4

Tighten each of the clamping bolts to the brick, using an adjustable wrench. When securing the bolts to a tile flue pipe, be sure not to over-tighten the bolts. Tile is brittle and is susceptible to cracking under excessive pressure.

Things You Will Need

  • Measuring tape
  • Torpedo level
  • Adjustable wrench

Warning

  • Always use caution when working on a roof.

About the Author

Max Stout began writing in 2000 and started focusing primarily on non-fiction articles in 2008. Now retired, Stout writes technical articles with a focus on home improvement and maintenance. Previously, he has worked in the vocational trades such as automotive, home construction, residential plumbing and electric, and industrial wire and cable. Max also earned a degree of biblical metaphysician from Trinity Seminars Ministry Academy.