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What is Roof Damage?

TECHNICAL BULLETIN

THE EFFECTS OF HAIL ON SHINGLES

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• HAIL DAMAGE

The impact of hail on shingles can cause the following:


1. It can remove and fracture the granules surfacing material.  This may be obvious after large storms that have large hail or storms that hail for extended periods of time.  This damage to the shingles may or may not be obvious.


2. The granule surface material is loosened.  This will not immediately show up as visible damage.  This will cause the shingles to lose granules over time at an accelerated rate and lead to premature failure.



• SHINGLE STRUCTURE AND PURPOSE


1. The granules protect the asphalt from sunlight and ultraviolet (UV) light.  Sunlight and UV will deteriorate the asphalt.  The asphalt will deteriorate very quickly once exposed to the sun.  Any accelerated granule loss will signifcantly reduce the life of the shingle.  It has been expressed that there are 25% more granules on a shingle that what is needed.  This is not true.  Some granules are not actually imbedded in the asphalt when the shingle is produced and will come off the roof in the first year after application.  After the first year the shingle does not carry more granules than are necessary to protect the shingle for its intended life expectancy.



• HOW TO IDENTIFY HAIL DAMAGE


1. Missing areas of granules on shingles.


2. Gutters, swimming pools or areas under eaves, that are covered with or full of granules.  Most shingles only have a few pounds of color granules per square of coverage.  It does not take too many missing or loose granules to have significant damage.


3. Dimples on shingles.  May also be seen on the back of the shingle as around, half round or crescent shaped bruises.  The dimples may only be seen on the edge of the shingles.


4. Dents in the flashing, ridges, vent stacks and lead boots would indicate that the roof has seem damaging hail.



• WARRANTY POSITION


In the printed warranty section of the warranty it states:

*The causes not covered by this Limited Warranty include, without limitation:

(s) damage to Shingles caused by acts of God, such as hailstorms and hurricanes.

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