Metal Roof Exhaust Flashing

Guest User
1/20/2010
I am looking for information about flashing for the exhaust from a Tankless Water Heater as it passes through a metal roof. The current flashing is a rubber like material. Are these types of flasings good for the elevated temperatures with the exhaust from these heaters.
Todd Miller
Isaiah Industries, Inc.
1/21/2010
Some are designed for high temp. You can also use an exhaust pipe with an insulated wall
Guest User
1/23/2010
Before: HVAC guys cut holes in the roof for the pipes. This was a temp. fix.
Guest User
1/23/2010
After: I made a soldered boot from galvanized steel to fit over the pipes. Then painted to match. The holes here where already cut so I had no choice, but you should try to arrange your Z-Bar so water flows around it easily - possible a diamond shape over a seam. This is one option.
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