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H i n t s & T i p s
A l g a e D i s c o l o r a t i o n
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| The following pictures represent
a worldwide problem that is common throughout most of the United States and is very
prevalent in the southeastern and northwestern parts of the country. This particular
problem was encountered approximately 35 miles outside of Kansas City, Kansas. The
discoloration that you see is the result of algae. The build-up of algae will expedite
deterioration of the roofing materials and can also raise energy costs. If the roof on a
building is white it will help reflect the sun's rays and keep the interior of the
building cooler. Roofs whose color is darkened by algae will absorb the sun's rays which
can heat the interior and raise energy costs. |
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| There are several ways to
alleviate this problem. One is to hose down the roof with diluted bleach or chlorine.
Bleach and chlorine are very effective but they also kill all the surrounding vegetation,
cause a discomforting odor and upset the environmentalists. Another way is to install some
algae-resistant shingles. But sometimes roofs that look bad aren't ready for replacement. There
are two good ways to solve the problem. Take a look at the following picture. Notice below
each penetration the roof is white like it’s supposed to be. This is because when
rain runs off of zinc, it cleans the algae off
of the shingles. Zinc strips installed along both sides of the ridge will eventually clean
the algae from the roof. |
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| Another good way is to apply
environmentally friendly chemical compounds for immediate results. Click here for more information about
removing algae from your roof. |
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