We make the cricket wider than the chase by about 6 inches on each side.
Roof to wood chimney chase flashing.
It can be made of a variety of materials depending on the type of roof and its pitch.
When we do a chase repair we usually rebuild or add a water diverter or cricket at the top see image 1.
Chimney flashing protects the structure of a roof at venting exit points for different roof types.
The chimney chase has a saddle flashing in.
Galvanized roofing nails about every 6 in.
Slide the prebent and soldered chimney saddle into place behind the chimney.
Nail it to the roof along the top edge.
Extending the cricket past the corners helps divert water flowing down the roof away from the chase and also simplifies step flashing installation.
Seal the sides of the chimney with prebent pieces of step flashing under each course of shingles photos 4 and 5.
Step flashing step flashing is the flashing that is incorporated into the shingle.
Along the edges or closer if necessary to flatten the metal.
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The main component of chimney flashing consists of a flat base with a tapered cone.