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I understand the general rule of not putting dis-similar metals together for corrosion/electrolyte problems but am confused regarding the aluminum vent stack flashing on stone-coated roofs for example.
Aluminum is very maleable, so can be bent around battens etc. but am wondering whether that can set up a corrosion problem if the bare side of the stone-coat shingle touches the aluminum.
Some "no-calk" pipe flashings with the rubber center have even been supplied with a stone-coat order from a distributor. So what's your opinion?
Dick in Washington
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Some stone-coat products may have a clear coat on their back side. I would inquire with the roofing manufacturer.
You could separate the two with a coat of paint or roofing mastic or sometimes with underlayment.
9/8/2006
Or copy this URL: https://www.metalroofing.com/spirit/comment/8614/find/Isaiah Industries, Inc.
9/13/2006
Or copy this URL: https://www.metalroofing.com/spirit/comment/8615/find/