particles in the gutters from the asphalt shingles

Look for bare spots on the shingles, where too much of the asphalt surface mat is now exposed.

Also, curling and cupping or crawling of the edges of the shingles.

There will always be granules in the gutters after any heavy rain event, especially when the roof is brand new or when it is getting very brittle and aged.

Ed

Ed the Roofer said:

Look for bare spots on the shingles, where too much of the asphalt surface mat is now exposed.

Also, curling and cupping or crawling of the edges of the shingles.

There will always be granules in the gutters after any heavy rain event, especially when the roof is brand new or when it is getting very brittle and aged.

Ed

Click to expand...

Thanks, I'll relay that info.
What is crawling?
The shingles are brittle, but no bare spots yet.

The bottom edge bowing downward, while the middle portion of the shingle starts to hump up.

Take your hand and place it flat on the desk. Then retract your fingers partially. Stop. That would be an example of the shingle material starting to have a "Crawling" effect.

Ed

Thanks; I'm thinking this person's roof is not in such bad shape.