Substance on roof

[Jeff Eastman]

,,,,,,,,,,,,,

Similar Threads:

• Mold like substance;
• Can a orange substance in the shower be mold?
• roof slope vs roof pitch
• Blue substance on Insulation batts in Crawl
• Powdery substance on window sill

[Scott Patterson]

Is this some sort of mastic on the roof?

They tried to seal the screws. Most likely the rubber grommets(if they used them) started to crack and needed replacement. But to save money they just rolled some type of mastic sealant over them.

[Richard Rushing]

What Scott stated is exactly what they did.

Jeff, one of the first issues that one will encounter with a metal roof is the rubber grommets (called elastomeric washers). When these crack (and they will) they can allow leaks to happen.

That's what they tried to seal up...

rr