How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manufactured and modular homes
Is it normal for a new shingle roof to lose granules?
Monday, December 31, 2018
You can expect some sand-like granules to appear around the discharge of gutter downspouts, or along the along the drip edge line on the ground where there are no gutters, after the first couple of rains when your roof is new. But it should be just a sprinkling, not a dense pile like in the photo above of a shingle roof at midlife with a granule loss problem. Roofers walking on the shingles while installing the roof can’t avoid dislodging some of the rock granules.
But excess granule loss from a newer roof is unusual. Here’s a few possible causes:
- Defective shingle product - A whole neighborhood of houses got replaced at the 5-year point here in The Villages by the manufacturer a few years ago due to premature deterioration.
- A severe storm - A strong thunderstorm is going loosen shingle granules, and a hail storm is even worse—usually also with pock-marked shingles.
- Tree branches rubbing on the roof - This creates clearly defined, swept areas of excessive granule loss.
See our blog post Why is granule loss a problem for an asphalt shingle roof? to learn more, along with how to use granule loss as one way to evaluate the remaining life in your roof.
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
To learn more about roofs and attics, see these other blog posts:
of Blog Posts
Top 5 results given instantly.
Click on magnifying glass
for all search results.
Buying a home in North/Central Florida? for a team inspection by two FL-licensed contractors and inspectors. Over 8,500 inspections completed in 20+ years. In a hurry? We will get it done for you.