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  1. #1
    Join Date
    Aug 2009
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    Raleigh
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    104

    Default 3 tab shingles gaps

    This is new construction and they did not butt shingles against one another when installing, leaving gaps. Curious to know if this may cause a performance issue down the road.

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  2. #2

    Default Re: 3 tab shingles gaps

    Poor quality workmanship and not installed to manufactures standards and specifications.

    Jeff Zehnder - Home Inspector, Raleigh, NC
    http://www.jjeffzehnder.com/
    http://carolinahomeinspections.com/

  3. #3
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    25,883

    Default Re: 3 tab shingles gaps

    Do you have a photo showing that the shingles are not butted to each other?

    It may be a manufacturing issue and the shingles may actually be installed correctly.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  4. #4
    Join Date
    Feb 2009
    Location
    Southern Vancouver Island
    Posts
    4,484

    Default Re: 3 tab shingles gaps

    Dang right it is an issue. The gaps allow water to hit the upper side of the shingle below. With a gap that wide, a bit of wind will blow water up under the shingle. They also did not stagger the seams properly. When seams line up on 3-tab shingles, water gets in.

    Example of crappy 3-Tab installation. This roof in the pics was 13 yrs old. The 3-Tabs were staggered by cutting either 1 or 2 tabs off, simple.
    But, butt, when you do that, every gap at the end lines up with a slot below. Then next row, a slot will land on the gap.

    Wet spots 5 rows down from the ridge. No underlay to protect the OSB. This whole installation was crap, a waste of money. Instructions are printed on every single package.

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    Last edited by John Kogel; 02-18-2017 at 04:26 PM.
    John Kogel, RHI, BC HI Lic #47455
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  5. #5
    Join Date
    Mar 2007
    Location
    Washington State
    Posts
    577

    Default Re: 3 tab shingles gaps

    Hard to tell with one poor photo, but that looks like a mess. Also it does not look like a standard 3-tab shingle.


  6. #6
    Join Date
    Oct 2010
    Location
    MONTREAL QUEBEC-CANADA
    Posts
    1,674

    Default Re: 3 tab shingles gaps

    Quote Originally Posted by Randall Clark View Post
    This is new construction and they did not butt shingles against one another when installing, leaving gaps. Curious to know if this may cause a performance issue down the road.
    Randal, you have any more pics?
    1: In the photo, the tabs appears much wider, say double the width or more than a standard 36" inch 3 tab shingle and the reveal 1/3 of a standard 36" inch 3 tab shingle.
    2: As well, the slope looks low slope, 4/12 to 2/12.

    Back in the day I laid low slope shingles which those appear to be.
    I thought they were prohibited? They are in my neck of the woods.
    Anyone have any documentation?
    As well, try to find a manufacturer.

    In my report; Observation: Low slope shingles.
    a. Not installed in accordance to the manufacturer's recommendations.
    b. To our best knowledge they are prohibited.
    The roof will under perform.

    Recommendations. (a) Contact the installer.
    (b) confer with an AHJ or municipal building inspector.

    Robert Young's Montreal Home Inspection Services Inc.
    Call (514) 489-1887 or (514) 441-3732
    Our Motto; Putting information where you need it most, "In your hands.

  7. #7
    Join Date
    Oct 2010
    Location
    MONTREAL QUEBEC-CANADA
    Posts
    1,674

    Default Re: 3 tab shingles gaps

    Two tab low pitch roof shingles.
    Historically, North American low-sloped roofs were shingled with a triple coverage, 3 ply, or 1/3rd of the mat is revealed, (two-tab "low pitch" shingle product.)
    Narrative: Theseshingles are not manufactured in North America today, so the industry has developed alternate procedures.
    http://www.canroof.com/publication/a...pes/wppa_open/

    Hope that helps.

    Robert Young's Montreal Home Inspection Services Inc.
    Call (514) 489-1887 or (514) 441-3732
    Our Motto; Putting information where you need it most, "In your hands.

  8. #8
    Join Date
    Dec 2008
    Location
    Maryland
    Posts
    2,701

    Default Re: 3 tab shingles gaps

    Look for Jet 25 shingles at local supply house.

    Last edited by Garry Sorrells; 02-26-2017 at 07:30 AM.

  9. #9
    Join Date
    Aug 2009
    Location
    Raleigh
    Posts
    104

    Default Re: 3 tab shingles gaps

    Thanks for the replies. I don't have an additional photos, sorry. I posted after I sent the report to the client but basically just stated this as a defect, potential for water entry, etc and for a roofing contractor to evaluate the entire roof and install/repair per mfg standards. I've seen this on junk that homeowners have done over the years but always wondered what problems would/could occur as time passed.


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