The area located behind the damper that prevents down drafts from coming into the firebox area and home.
This area should be parge coated with super cement to provide a smooth transition to the flue (draft performance), protect the masonry and prevent cinders, heat/fire and carbon monoxide from entering the home through voids in otherwise exposed brick and mortar. The dome area of brick corbels that supports the flue tiles and directs flue gases safely to the flue. The structure that passes through the construction of the home and encloses the flue (or flues). This material should be 5/8″ or thicker terracotta tiles or a UL listed liner made of stainless steel or other approved materials. The safe, approved material that lines the flue’s interior. Flue:Ī safe pathway for heat and combustion by-products through the construction of the home otherwise known as the interior of the chimney. The cement crown slopes away from the flue to wash the water away. The chimney crown is the cast concrete or mortar at the top of the chimney that seals off the air space between the outer walls of the masonry chimney and the flue liner and prevents water entry into the stack. Chimney caps also keep out animals, leaves and other debris. The chimney cap is also a spark arrestor which keeps sparks and cinders from landing on the roof.
Moisture is the number one cause of chimney and fireplace deterioration. Chimney Cap (not shown on this illustration):Ĭhimney caps cover the top opening of the flue for the purpose of keeping out rain and snow.
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