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Old 09-04-2011, 07:57 PM   #1
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Skylight in reroof - leak


Greetings.

This is my first post and first ever roof repair. I've got a leaking Velux skylight in a shingled roof (pitch is about 5) with 2 layers of shingles, and I'm almost done with researching the fix (new flashing kit). My one remaining question is this:

With 2 layers of shingles, I need to remove the two layers to get down to the sheathing. When I put the shingles back, should I build up 2 layers or just leave it with the one new one. I am just worried that if I leave it as one layer, it will sit slightly lower than the surrounding shingles, not sure if this is bad or will look bad.

Thanks for any information.

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Old 09-04-2011, 08:09 PM   #2
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Skylight in reroof - leak


You will have to go with two. The new flashing kit is a must though also.

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Old 09-04-2011, 11:21 PM   #3
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Skylight in reroof - leak


Ok great, I will do that.

Another question: The couple of videos I've seen doing this job cut out a nice neat rectangle, about a foot or two wide around the skylight. They show waterproof underlayment stuck on to the inner portion of this sheathing and the skylight, but they don't go into what happens at the outside, where the old tiles and felt are cut.

Do I slide new asphalt felt under there, overlapping the outside edge? Or use waterproof underlayment? Something else? I'd really appreciate a few words here as I can't find it in any of the books I just bought or on youtube. Keep in mind I have 2 layers.

Last edited by Achilleus; 09-04-2011 at 11:23 PM.
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Old 09-04-2011, 11:33 PM   #4
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Skylight in reroof - leak


so most likely the second layer of roofing is not step flashed to the existing unit,just cut to it and caulked?most likely where your problem is
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Old 09-05-2011, 09:27 PM   #5
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Skylight in reroof - leak


Right, the flashing is only under the 1st layer. It leaks the same on both sides, so I assume that the top section is leaking.
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