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Old 08-04-2012, 08:45 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, 09:09 PM   #2
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Bulge in roof shingles and valley flashing


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, 01:53 AM   #3
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Bulge in roof shingles and valley flashing


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, 12:59 PM   #4
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Bulge in roof shingles and valley flashing


Could be ends of decking not nailed properly.
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Old 08-07-2012, 01:51 PM   #5
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Bulge in roof shingles and valley flashing


Thanks for replies, helpful info to know. I'll post a pic for reference in a few days.
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