Flashing Between Brick Chimney And Siding

Repair of a water damaged framed chimney using low maintenance pvc corner boards and fiber cement siding.

Flashing between brick chimney and siding.

Again only about 1 2 to 3 4 inch gap. Flashing between brick and siding is a relatively similar process on all types of brick to siding transitions although there may be slight variations based on manufacturer recommendations. The closed cell foam won t rot or soak up water just be sure to use enough blue tape to protect the brick and siding from the expanding foam. For fireplace boxes and chimneys apply caulking along both parts at the back to ensure a vertical seal at the brick.

Thu feb 01 2007 7 13 pm our ma cider mill had a chimney that sttod proud of the siding which went all the way across behind it. 5 press the flashing into place at the transition. Proper flashing around a chimney includes two layers. Sections of l shaped sheet metal are woven into the shingle courses and lapped up the side of the chimney.

This flashing would be sealed between it and the brick with you guessed it silicone caulk. The first is called step flashing. Occasionally however it is found on chimneys installed on top of wood furring strips that provide a 1 inch clearance between the chimney and the siding. From there you have the choice of installing several types of flashing which would extend behind the vinyl siding and over a few inches of the brick.

Vinyl however is not the best material for chimney exteriors and is generally combined with masonry materials for greater wear and fire resistance. And more often than not the culprit is the flashing the sheet metal that keeps the intersection between the chimney and roof watertight. Pieces of 18 inch wide flashing installed prior to the brick work but on top of the house wrap in a stepped fashion periodically laying on top of the lapped upper portion of the siding to get the water back to the exterior of the wall is more along the lines that i would be thinking of.