Why is the base of the gas flue at the roof red?
Wednesday, June 13, 2018
Heat-Rated Rubber Roofing Boot
It is called a pipe flashing and provides a secure seal between a pipe or flue and the roof it penetrates. The red color means that it is heat-rated to withstand high temperatures at the surface of the flue that it surrounds. You might also hear it referred to as a “heat-rated rubber roofing boot,” although the material is usually silicone. Regular non-heat-rated pipe flashings are gray or black.
Here’s a close-up of one, and we always recommend that a pipe clamp be wrapped around the top of the pipe flashing, although one was not installed here. Eventually the material becomes less elastic and sags, but the pipe clamp will keep it snug longer.
• • • • • • • • • • • • • • • • • • • • • • • • • • •
To learn more about heating and air conditioning systems, see these other blog posts:
How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manfuactured and modular homes
of Blog Posts
Top 5 results given instantly.
Click on magnifying glass
for all search results.