How To Shingle A Roof Around A Chimney

A silent movie about flashing a metal roof into a brick chimney from unioncorrugating.

How to shingle a roof around a chimney.

Hammer 4 galvanized roofing nails into. Now images of specifications for a chimney head flashing are hard to find for some reason they always like to show a cricket behind the upper side of a chimney. Cut two opposing 45 degree notches into z closure to allow a 90 degree bend. Shingle over the portion of the saddle that rests on the roof and cut the shingles neatly along the valley leaving about 2 in.

Flashing the area of a chimney with a rubber roof system is very tricky. Bend legs up the chimney sides about 1 inch. But below is an image of a masonry chimney with a chimney head. This head flashing view from lower on the roof shows it extending beyond the width of the chimney and diverting the runoff around the edges of the masonry chimney.

Installing shingles around the chimney is particularly important as the joins between the surface of the roof and the vertical surface of the chimney creates the ideal place for leaks to occur. Panels above the chimney should be removed. However metal flashing crickets with seams at the apex or within the system are subject to leakage no matter how much sealant is applied. Damaged or improperly installed roof flashing especially around the chimney or dormer is one of the most common causes of roof leaks.

The proper installation of shingles and flashing will prevent leaks from happening saving you the trouble of reinstalling the roof before it is needed. The part of the flashing that lies flush with the roof should overlap the roofing shingles. Use tin snips to clip the flashing at the point where the other side of the chimney lies against the flashing. The bent edge should fit around 1 corner of the chimney.

How to buy chimney flashing making sharp straight bends in sheet metal is tricky unless you have access to a tool called a sheet metal bending brake. According to the federal emergency management agency fema improper roof flashing could lead to wood rot and even deck collapse.