What Is A Flue Cap

A flue cap is typically made of sheet metal and some type of screen.

What is a flue cap. Single flue chimneys with extended flues. Chimney flue caps have a big job to take care of. 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. This particular chimney cap is defective.

A single flue chimney cap will sit on your existing flue and have a flange that will overhang the flue. Chimney caps that slip into the flue finding a chimney cap for this type of flue is also very simple. For oval shaped flues make sure the cap is designed for the shape. Single flue chimneys with flexible metal liners.

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. Some chimney flue caps are elaborate others are basic but none are solely for decoration. Just measure the inside diameter of your flue and search for a cap with that diameter. Too thin cracked leaky missing an expansion joint at the flue tile and lacking a drip edge projection over the chimney top.

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. Sheet metal is commonly used to make a flue cap. Without a cover. The inner diameter is the only measurement you need when capping a metal chimney liner.

Most multi flue chimney caps are made custom to your specific chimney. Once you have. Flue stretcher chimney cap. How chimney flue caps work.

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. When choosing a flue cap decide on the style that best compliments the home. They can be easily removed to clean the chimney and are available in many styles to compliment a home s decor. 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.