Chimney Siding Flashing

I frequently see the sheathing and or housewrap where siding butts into a chimney.

Chimney siding flashing.

Sections of l shaped sheet metal are woven into the shingle courses and lapped up the side of the chimney. Seal the cap flashing by caulking along the mortar joint with polyurethane caulk. There was a metal patch covering a hole rotted trim boards improperly installed flashing which caused much of the initial damage and wood used improperly to cover missing caulking. Proper flashing around a chimney includes two layers.

The siding on the chimney and back side of these homes were in disrepair. Start at the front of the chimney and mark the third mortar joint up from the roof. 1 what is the generally recognized best practice for flashing sealing this joint. Improper siding and flashing details can lead to siding failure even with hardie plank.

And more often than not the culprit is the flashing the sheet metal that keeps the intersection between the chimney and roof watertight. 2 aside from tearing off the siding and correcting it from the beginning what do you recommend as a solution when you see the underlying structure at this joint. The first is called step flashing. Copper is one of the best metal materials to use for exterior flashing because it is durable and malleable.

Flashing materials should be inspected periodically and maintained when needed to prevent leaking problems into the home interior. Flashing for roofs chimneys windows decks siding and exterior trim residential and commercial flashing installation services copper flashing is one of the most durable of roof flashing materials. The next step is to mark and cut the grooves in the chimney s mortar joints to accept the cap flashing. Anyplace where the roof plane meets a vertical wall such as a dormer a chimney or a split level roof flashing is necessary.

Extend this mark around both front corners about 6 in. Metal flashing materials are used as transition pieces between the roof and chimney structures.