This selection of chimney caps are designed to attach to the mortar crown. These caps are for protecting multiple flues in the same chimney - choose from 4 screen heights. Each cap comes with stainless steel masonry screws and masonry drill bit.
These caps attache to the mortar crown around the flue tile with mounting flanges and provides a very custom look. When sizing for this style cap, the base size is the inner opening; add 3" to each side to make sure you allow for the mounting flanges.
For instance, if the OUTER DIMENSION of the flue tile measures 12" x 12", you would choose the SS13x13 cap and verify that the mortar crown can accommodate the mounting flanges which would measure 16" x 16 (base size + 3") in each direction for the mounting flanges.
Specify your desired screen height. The screen should be at least 5" taller than the flue; if your chimney has multiple flues then choose a screen height that is at least 5" taller than the tallest flue.
Caps with an 8" screen height ship fully assembled. Caps with larger screens ship knocked down and assemble easily.