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  1. #1
    Join Date
    Mar 2007
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    Southern Maryland
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    33

    Default Shingle corners curled up

    The picture doesn't do this justice. The shingle corners on all shingles only on the back of this roof were curled up just a little. The front was fine. Is there a reason? Bad batch of shingles? Thanks in advance,

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    Jim, in Calvert County, MD

  2. #2
    Join Date
    Aug 2007
    Location
    Memphis TN.
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    Default Re: Shingle corners curled up

    Quote Originally Posted by Jim Kasterko View Post
    ---The shingle corners on all shingles only on the back of this roof were curled up just a little. ----The front was fine. Is there a reason?
    Jim,

    My guess would be the shingles in the back were in the shade and the adhesive did not get hot enough to set before an event such as High wind lifted the edges.

    It Might have Choked Artie But it ain't gone'a choke Stymie! Our Gang " The Pooch " (1932)
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  3. #3
    Join Date
    Feb 2008
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    Caledon, Ontario
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    4,797

    Default Re: Shingle corners curled up

    In addition to Billy's comments, south and west exposures tend to wear fastest due to sunlight, on the other hand they could be different quality shingles on the back side of roof?

    The value of experience is not in seeing much, but in seeing wisely.

  4. #4
    Join Date
    Mar 2007
    Location
    Dallas, Texas
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    4,112

    Default Re: Shingle corners curled up

    Age. We see it all the time here in the sunny southwest.
    You might have other factors like the others mentioned, but the primary factors here are age and exposure.

    Jim Luttrall
    www.MrInspector.net
    Dallas, Texas

  5. #5
    Join Date
    Mar 2007
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    Garland, TX
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    605

    Default Re: Shingle corners curled up

    This guy found the cure...almost

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    badair http://www.adairinspection.com Garland, TX 75042 TREC # 4563
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  6. #6

    Default Re: Shingle corners curled up

    I have seen sellers re-roof the front only, it may not be the case with yours, but it has & is being done.

    Clarksville Home Inspection
    JW Goad
    TN License #307 | KY License #2402

  7. #7
    Patrick Norton's Avatar
    Patrick Norton Guest

    Default Re: Shingle corners curled up

    I have found this condition where there is poor ventilation in the attic below.


  8. #8
    Nolan Kienitz's Avatar
    Nolan Kienitz Guest

    Default Re: Shingle corners curled up

    Quote Originally Posted by BARRY ADAIR View Post
    This guy found the cure...almost
    Barry - wonder if it was at least 6-mil poly? Maybe a heavier weight would have helped?


  9. #9
    Michael Farha's Avatar
    Michael Farha Guest

    Default Re: Shingle corners curled up

    I see that alot in Oklahoma. It's usually on the south slopes where it gets more weather and sun.


  10. #10
    Join Date
    Feb 2008
    Location
    Tennessee
    Posts
    105

    Default Re: Shingle corners curled up

    Here in West Tennessee this condition is very common with roof surface facing the north....even on a roof that is less than 5-7 years of age. Shade, lack of sunshine, heavy moisture, all causes in this area.


  11. #11
    Greg D. Dames's Avatar
    Greg D. Dames Guest

    Default Re: Shingle corners curled up

    When I was working Hurricane claims in LA and FL got used to the blue tarped roofs. If you look at the area now Google Earth they still have tons of blue roofs. I guess they like them and they are cheaper than shingles.


  12. #12
    Bill Tomberlin's Avatar
    Bill Tomberlin Guest

    Default Re: Shingle corners curled up

    This is a typical manufacturing issue. The cupping or curling of the shingles happens when the top surface of the shingle shrinks relative to the bottom of the shingle. Same as with the Clawing or downward curling of the shingle only in reverse.


  13. #13
    Join Date
    Mar 2007
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    Fuquay Varina, NC
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    1,072

    Default Re: Shingle corners curled up

    Jim Kasterko did not state the age.
    Jim Luttrall I believe would be the closest answer.

    (My guess would be the shingles in the back were in the shade and the adhesive did not get hot enough to set before an event such as High wind lifted the edges.)

    As soon as the heat rises sun or no sun the shingles will lay flat. Walk on them and it can leave foot prints. The wind would lift the whole tab not just the edges.

    Mike Schulz License 393
    Affordable Home Inspections
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  14. #14

    Default Re: Shingle corners curled up

    Here is one that looks like a nice new roof from the road.

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  15. #15
    Join Date
    Mar 2007
    Location
    Vancouver - Canada
    Posts
    221

    Default Re: Shingle corners curled up

    haha... John, I was going to try and re-label you photo with "normal" and "moss covered".

    I would agree with the earlier post. Up here it's usually due to age or a attic venting (or lack of) issue.


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