How To Shingle A Roof Around A Chimney

But below is an image of a masonry chimney with a chimney head.

How to shingle a roof around a chimney. Instead sealing the chimney crown with a liquid sealant we used a rubber membrane. That part of the flashing is very vulnerable to leaks. Trim panels to fit around the chimney. Shingle over the portion of the saddle that rests on the roof and cut the shingles neatly along the valley leaving about 2 in.

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. Continue laying your shingles horizontally up the roof. The part of the flashing that lies flush with the roof should overlap the roofing shingles. Bend legs up the chimney sides about 1 inch.

According to the federal emergency management agency fema improper roof flashing could lead to wood rot and even deck collapse. Use tin snips to clip the flashing at the point where the other side of the chimney lies against the flashing. Cut two opposing 45 degree notches into z closure to allow a 90 degree bend. Damaged or improperly installed roof flashing especially around the chimney or dormer is one of the most common causes of roof leaks.

Bend the clipped flashing around the chimney. Comprised of step tins rubber or some other type of membrane. If you hit a stack vent or chimney interlace the shingles with the flashing to allow water to run down the roof. A piece of metal that is sealed to the chimney surface and covering the top of the step flashing to form a water tight barrier by directing water over and away from the step flashing.

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. 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. Flashing the area of a chimney with a rubber roof system is very tricky. The cricket can be made of shingles and roofing materials or flashed with metal.

A typical roof to chimney flashing will consist of two parts. The lower step flashing. And the upper counterflashing. The proper installation of shingles and flashing will prevent leaks from happening saving you the trouble of reinstalling the roof before it is needed.

Next lay the first full row of shingles so they re directly covering the starter row. The bent edge should fit around 1 corner of the chimney. Most of the time the metal flashing has to be inserted into a slot into the face of the brick. The flashing on a chimney is one of the biggest reasons for roof leaks.

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. However metal flashing crickets with seams at the apex or within the system are subject to leakage no matter how much sealant is applied.