Keeping
your roof clean can significantly improve not only the appearance but
also the over-all longevity. The granules on your shingles are ceramic
coated and are designed to reflect the heat of the sun's rays. When
these granules are coated by a film of dirt, pollen and algae then they
can no longer do their job of reflection therefore the shingle rather
absorbs the heat which accelerates the rate of deterioration.
