What Is A Flue Cap

Single flue chimneys with extended flues.

What is a flue cap.

Another option is a multi flue chimney cap. A flue stretcher chimney cap not only protects the inside of your chimney but is also designed to protect the concrete crown area at the top of the chimney. They can be easily removed to clean the chimney and are available in many styles to compliment a home s decor. How chimney flue caps work.

Just measure the inside diameter of your flue and search for a cap with that diameter. Once you have. The right chimney cap fits the shape and size of your flue otherwise the cap itself serves little to no purpose. This particular chimney cap is defective.

Why do i need a chimney cap the most important reason for capping your chimney is to protect the inside of your chimney from water which can lead to moisture damage. All flue shapes for this type of chimney typically need a cap that attaches with either clamps or screws. Sheet metal is commonly used to make a flue cap. When choosing a flue cap decide on the style that best compliments the home.

Chimney flue caps have a big job to take care of. Some chimney flue caps are elaborate others are basic but none are solely for decoration. Flue stretcher chimney cap. A flue cap is typically made of sheet metal and some type of screen.

Single flue chimneys with flexible metal liners. For oval shaped flues make sure the cap is designed for the shape. Too thin cracked leaky missing an expansion joint at the flue tile and lacking a drip edge projection over the chimney top. Chimney caps that slip into the flue finding a chimney cap for this type of flue is also very simple.

A single flue chimney cap will sit on your existing flue and have a flange that will overhang the flue. Without a cover. The inner diameter is the only measurement you need when capping a metal chimney liner. In our photo at left the chimney cap also called a mortar cap is the gray concrete visible around the projecting flue tiles at the top of the chimney.