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Chimney flashing is a roofing detail used to seal any space between a building’s chimney and its roof to prevent water entering the roof. Some of the most vulnerable parts of a roof are the joints found in the intersection between a roof and chimney. Due to weather changes, they continually contract and expand.


Making allowance for the expansion and contraction of the joints without side effects and keeping the intersections watertight are functions performed by flashing. If your chimney flashing is not properly fitted, water will start to seep into the joints, and this may cause damage to the ceiling and other things in the roof like your wiring. With water damage, the ceiling around the chimney gets a brown colouration; this is the point where you call a roofing service provider.