Bulge In Roof Shingles And Valley Flashing - Roofing/Siding - DIY Home Improvement | DIYChatroom

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Old 08-04-2012, 07:45 PM   #1
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Bulge in roof shingles and valley flashing

I just noticed while checking up on my one story roof that one area where shingles meet valley flashing, the flashing and shingles have a small spot that bulges. If I step on top of it, it flattens out (with a pop kind of sound) then will bulge back up when I walk away. This is repeatable.

Is this:

bad roofing job that led to this?

eventual wear and tear of roof?

an indication of a roof problem that needs to be fixed? immediately or can be deferred?

It's only one small area of roof though.


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Old 08-04-2012, 08:09 PM   #2
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Without a picture were all going to have to just guess.

Can be a whole lot of things.

Some simple things it could be is they used aluminum flashing under the valley
and it's just buckling a little,
Shingles nailed to close together.
Tar paper was not layed flat.

Only to find out is to remove a few shingles with a flat bar and cheak it out.


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Old 08-07-2012, 12:53 AM   #3
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The bulge in the valley could be valley not nailed properly. The bulge in the shingles may be on the eave were the ice and water shield has bubbled???
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Old 08-07-2012, 11:59 AM   #4
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Could be ends of decking not nailed properly.
New members: Please consider adding your location to your profile.

If you do what you've always done, you'll get what you've always got.


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Old 08-07-2012, 12:51 PM   #5
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Thanks for replies, helpful info to know. I'll post a pic for reference in a few days.
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