Washing a roof with asphalt shingles


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Old 04-12-16, 08:50 AM
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Washing a roof with asphalt shingles

There are companies out there that will come out and wash your roof but I wonder if there is a product/system I can purchase or rent to do this job myself?
 
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Old 04-12-16, 08:54 AM
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Why do you think it needs to be washed?
 
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Old 04-12-16, 10:20 AM
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The North facing side is a dirty dark brownish color where as the opposing side is closer to the original tan. The roof is getting old and will at some point need replacing. There is also some what I guess is a greenish colored mold in some spots. Also on the porch roof and that is on the better side.

I want to sell the house and this will become a problem, I'm sure.
 
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Old 04-12-16, 10:24 AM
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They probably pressure wash the roofs
It's never a good idea to pressure wash a shingle roof as it will remove some of the granules and shorten the remaining life of the shingles. If I did anything I'd spray on a bleach/water solution maybe with some TSP mixed in and rinse it with a garden hose. It won't do as pretty of a job as the PWer will but isn't likely to damage the shingles.
 
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Old 04-12-16, 10:48 AM
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An old roof is an old roof, not much you can do about it without making it age faster, as removing the granules would do.
 
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Old 04-12-16, 12:59 PM
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An old roof is an old roof, not much you can do about it without making it age faster, as removing the granules would do.

How do explain why one side is cleaner than the other if it is merely age alone?
 
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Old 04-12-16, 01:38 PM
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It's not age alone but what I meant to imply was you were not going to be able to make it look new again.
 
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Old 04-12-16, 03:18 PM
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The darker north side probably has mildew on it where the dew doesn't dry off as quick.
 
 

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