Flashing Around Chimney Siding

Damaged or improperly installed roof flashing especially around the chimney or dormer is one of the most common causes of roof leaks.

Flashing around chimney siding.

Wall flashing where siding meets a chimney clean out the gap use backer cord for large gaps and seal with good quality butyl caulk in clear colour. The first is called step flashing. When it rains hard water has been coming in thru the front part of the fireplace between the chimney and the house not down the chimney and chimney has a cap. You probably know a soaker by a different name.

Roof chimney leak repair. Pound the flashing into the grooves and fasten with the drive in expanding anchors. Flashing is a strip of metal usually aluminum about 8 inches long and bent at 90 degrees with each side at least 5 inches wide. 05 01 2011 05 17 am 5.

It s length is the gauge lap 1 inch. Proper flashing around a chimney includes two layers. The stepped cover flashing goes over the top of the soakers where they go up the wall. Sections of l shaped sheet metal are woven into the shingle courses and lapped up the side of the chimney.

I had the flashing around the chimney checked and it received a thumbs up roof is only a year old. 4 inches go along the width of the tile and 3 inches along the wall. If the sidewall is stucco or solid wood like ours and you can t open it to get flashing behind it continue the step flashing to the peak of the roof then cover the step flashing with cap flashing photo 2. It s an l shaped piece of lead that fits in between each tile.

Bend a piece of cap flashing to fit around the top corner of the chimney and add the cap flashing across the back of the chimney. Improper siding and flashing details can lead to siding failure even with hardie plank. I also had a chimney guy come out to clean and check the chimney and all is good. And more often than not the culprit is the flashing the sheet metal that keeps the intersection between the chimney and roof watertight.

According to the federal emergency management agency fema improper roof flashing could lead to wood rot and even deck collapse.