Granule loss low slow roof


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Old 07-07-21, 07:18 PM
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Granule loss low slow roof

It looks like either the roof is getting granules washed from the rest of the roof or it's degraded a bit near the roof drain. It's a low slope roof. The membrane underneath seems ok. What's the best way to repair or patch this?
 
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Old 07-07-21, 07:50 PM
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My driveway gets shingle granules on it because I don't have a gutter on that side of the house. Nothing wrong with the driveway, that's just where they happen to collect, in the lowest parts of the pavement. You're having the same thing happen. The water doesn't flow fast enough to wash them down the drain. If you look in the gutters of most any house you will find shingle granules.

Doesn't mean a repair is necessary, it's normal wear and tear. If you feel like you need to do something about it there are multitudes of roof coatings that you could roll on. The white ones are good because because reflect heat.
 
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Old 07-08-21, 04:42 AM
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If I put a patch over the existing layer, how do I deal with the drain part? Cut and fold the rubber corners inside the drain or just put extra rubber cement around it?
 
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Old 07-08-21, 04:49 AM
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"If I put a patch over the existing layer..."
What do you need to patch? You are just seeing the granules and dirt accumulate in a low part of the roof.
 
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Old 07-08-21, 06:00 AM
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It looks eroded next to the drain on left side. I'll take a closer up picture
 
 

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