|
|
|
|
|
Serving NE Ohio Since 1956 |
||||||||||||||||||
|
Sample
manufacturers disclamer for hail damage The Effects of
Hail Damage on Asphalt Shingles From: Owens
Corning Message: When an Owens
Corning roof has been exposed to a hailstorm severe
enough to cause granules to be dislodged from the
surface of the shingles (in spots large enough
which expose the asphalt), the roof has been
compromised. The colored granules which are placed
on the surface of the shingle to serve two
purposes: 1. They provide an
aesthetically pleasing product, and 2. They protect
the underlying asphalt from exposure to the sun.
Prolonged exposure
to sun causes asphalt to deteriorate. This is the
reason that a hail damaged roof will tend to fail
prematurely. Heavy hail damage
is obvious because of the indentations in the
shingle. When the surface damage of the shingle is
not visible, look for indentations on vents, ridge
vents, siding, or any other softer metal objects
that may show impact. The effects on the shingle
may not be apparent for about a year. At this time,
circular areas of granules will fall off the
shingle. This is often called spalling. What has
occurred is that the impact of the hailstone has
broken or weakened the bond between the granules
and the asphalt. After a year or so of weathering,
the granules fall off the shingle in the circular
area of impact. With granules missing, the sunlight
(UV) quickly attacks the asphalt and the maximum
performance of the shingle has been compromised.
The Owens Corning Limited Warranty on Roofing
Shingles is void when shingles are damaged due to
the evidence of hailstorms under all conditions
stated above. |
|
||||||||||||||||
|
|
||||||||||||||||||
|
Questions or Comments? Contact the Webmaster. |
||||||||||||||||||
Roofing
Division Technical Services Bulletin / Bulletin
Number: RD - 03/03/03