17 in. x 17 in. x 8 in. H Chimney Cap in Black Galvanized Steel

No, Home Depot does not carry the BigTops in stores.

If you are looking for a chimney cap to bolt onto your masonry flue tile, take a look at model # CBO1515. It fits outside tile dimensions: 13.75 in. x 13.75 in. to 16 in. x 16 in. If you are looking for a top mount chimney cap that sits on the cement, you will want to measure from brick to brick to ensure this model # BBT1717 has enough room to mount properly with the flanges. BBT1717 has 8" mesh so your tallest flue tile should be 3" or less.

Sounds like your chimney is a shroud that houses the flue of a prefab hearth appliance. It is vital to learn about your appliance and venting. You can locate the Manufacturer & model number from the unit and learn the guidelines/requirements/limitations of the system. This HY-C chimney cap on this web page is intended for masonry chimney applications only. Call us (800-325-7076) for further assistance.

The BBT1717 measures 17" x 17" from screen to screen. It is designed to mount on a flat chimney top with flanges measuring about 1 1/4" on each side. BBT1717 requires a 20" x 20" masonry chimney top for the 24-gauge galvanized steel base flanges to mount properly.

Thank you for your inquiry. If the 16.5” x 16.5” is your outside brick measurement, no the 17” x 17” cap will not work. If it is the outside brick measurement you need the BBT1414. If your chimney has a clay flue tile exposed out of the top the screen wire mesh should be 5” taller than that height. So if you had a glue sticking up 5” you would need the BBT1414K-10W which has 10” high mesh.