What Is A Flue Cap

Chimney flue caps have a big job to take care of.

What is a flue cap. Another option is a multi flue chimney cap. Most multi flue chimney caps are made custom to your specific chimney. 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. The right chimney cap fits the shape and size of your flue otherwise the cap itself serves little to no purpose.

All of the smoke from your fireplace is directed out through the chimney flue on top of your roof which contains a hole that is at least one square foot wide. How chimney flue caps work. Single flue chimneys with extended flues. A single flue chimney cap will sit on your existing flue and have a flange that will overhang the flue.

Single flue chimneys with flexible metal liners. Just measure the inside diameter of your flue and search for a cap with that diameter. A flue cap is typically made of sheet metal and some type of screen. Too thin cracked leaky missing an expansion joint at the flue tile and lacking a drip edge projection over the chimney top.

Some chimney flue caps are elaborate others are basic but none are solely for decoration. This particular chimney cap is defective. When choosing a flue cap decide on the style that best compliments the home. Sheet metal is commonly used to make a flue cap.

Flue stretcher chimney cap. They can be easily removed to clean the chimney and are available in many styles to compliment a home s decor. For oval shaped flues make sure the cap is designed for the shape. All flue shapes for this type of chimney typically need a cap that attaches with either clamps or screws.

The inner diameter is the only measurement you need when capping a metal chimney liner. 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. On the sides of the flange there is four or more bolts attached to the cap to pressure fit the chimney cap to the flue. Once you have.