Damaged or improperly installed roof flashing especially around the chimney or dormer is one of the most common causes of roof leaks.
Roof flashing around chimney.
Pan flashing should extend at least 12 inches up the roof plane.
Cut the side cap flashing to fit the angle of the roof so it overlaps each lower cap flashing at least 2 in.
The part of the flashing that lies flush with the roof should overlap the roofing shingles.
In the second layer more sheet metal is inserted into the chimney mortar joints and folded over to cover the first layer.
Pound the flashing into the grooves and fasten with the drive in expanding anchors.
In most cases it is essential to use a skilled craftsman to wrap a layer of the rubber material into a step flashing and then counter flash with aluminum or copper.
The bent edge should fit around 1 corner of the chimney.
Screw the pan flashing to the roof with gasket screws.
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Effective roof flashing around a chimney includes two layers.
And more often than not the culprit is the flashing the sheet metal that keeps the intersection between the chimney and roof watertight.
It is a time consuming process.
Flashing the area of a chimney with a rubber roof system is very tricky.
Rivet the pan flashing to the sidewall flashing.
Fit the flashing up against the front of the chimney.
One laying involves tightly playing sheet metal around the chimney edges.
The first is called step flashing.
Use tin snips to clip the flashing at the point where the other side of the chimney lies against the flashing.
Sections of l shaped sheet metal are woven into the shingle courses and lapped up the side of the chimney.
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.
Cut and fold pan flashing to fold up the back of the chimney and over the sidewall trim.
Proper flashing around a chimney includes two layers.
