Technical Bulletin #89 : Tree Sap Accumulation

FACT

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While metal roofing is known for its ability to resist fungus growth and  subsequent streaking and staining, the sap from nearby or overhanging trees that lands on the roof can support fungus and hold dirt.

SOLUTION

Owners of homes in wooded areas should avoid light-colored metal roofs that will show dirt accumulation more than dark roofs. Whenever possible, it is helpful to keep sap-bearing trees away from the roof as much as possible. Keep in mind that dirt and fungus accumulation are usually just an aesthetic issue and will not affect the life expectancy of a metal roof. However, if the appearance of this dirt becomes objectionable, it can usually be power-washed or cleaned by hand using a minor detergent solution. Adhere to pro-active roof safety measures if this is attempted.

Classic Products, Inc.


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Classic Metal Roofs, LLC -- lifetime residential metal roofing. \'The best roofs under the sun.\' Located in and serving southern New England.

Classic Metal Roofs, LLC,
Serving Massachusetts, Rhode Island, Connecticut, and southern New Hampshire
Toll free: 866-660-6668
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