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Roof to wood chimney chase flashing.
Galvanized roofing nails about every 6 in.
Chimney flashing protects the structure of a roof at venting exit points for different roof types.
The main component of chimney flashing consists of a flat base with a tapered cone.
Seal the sides of the chimney with prebent pieces of step flashing under each course of shingles photos 4 and 5.
Here we are we re on the roof and we re looking at this chimney chase which is pretty typical to see on a roof.
Step flashing step flashing is the flashing that is incorporated into the shingle.
Slide the prebent and soldered chimney saddle into place behind the chimney.
Along the edges or closer if necessary to flatten the metal.
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.
Within a shingle roof the flashing is expertly woven into the shingles or roofing materials to protect the seam between the chimney and the roof.
This design provides waterproofing at the exit point of a vent to divert water around the vent and to prevent water intrusion through the hole cut into the roof decking.
We make the cricket wider than the chase by about 6 inches on each side.