Does sweeping the roof remove granules from the shingles?

needinfo001August 11, 2014

I have a large tree that overhangs the back side of my roof.
The roof was installed in 11/2009. It was swept once about a year later when a roofer fixed a leak at a vent flashing. Over the last 4 years it has gotten a lot of leaves and broken twigs and debris on it from the tree.
I went up to sweep it about 2 weeks ago. Was that a mistake?
Did i remove a lot of granules in the process?

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Trebruchet

No. Sweeping a roof once a year does not harm it.

    Bookmark   August 11, 2014 at 6:02PM
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snoonyb

You would have seen any granular displacement while you were sweeping.

The granuals are an impregnated coloring agent.

There total removal will shorten the life expectancy of the product.

    Bookmark   August 11, 2014 at 8:39PM
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renovator8

Sweeping won't but walking on it will.

    Bookmark   August 12, 2014 at 8:29AM
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bus_driver

Have you considered that removing the overhanging tree will eliminate the tree debris on the roof and thus eliminate the perceived need for sweeping?

    Bookmark   August 12, 2014 at 5:47PM
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