chimney apron

chimney apron

[′chim·nē ‚ā·prən]
(building construction)
A flashing made of a nonferrous metal, such as copper, that is built into the masonry of the chimney and the roofing material at the place where the roof is penetrated by the chimney.

chimney apron

A nonferrous metal flashing built into the chimney masonry and roofing at the penetration of the roof by the chimney.