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  1. #1
    Join Date
    May 2012
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    Bay Area
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    15

    Default Improper starter course - 3 tab shingle

    What do you think is going on here? My first impression was an improperly installed starter course. But as I think about it, it may be that this top layer might have been installed directly onto a first layer without felt underlayment; so it's actually the second layer? This condition is pretty much the case around the perimeter of the roof. I would have thought to find more eave damage if it was an improper starter course, but I only found one place with eave damage.

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  2. #2
    Join Date
    Mar 2007
    Location
    Columbus GA
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    3,746

    Default Re: Improper starter course - 3 tab shingle

    I think you have it right.
    Looks like another layer of roofing was (improperly) installed over an earlier roof.

    ' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.

  3. #3
    Join Date
    Mar 2007
    Location
    Spring Hill (Nashville), TN
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    5,847

    Default Re: Improper starter course - 3 tab shingle

    2 layers of shingles and installed improperly! Good find..

    Scott Patterson, ACI
    Spring Hill, TN
    www.traceinspections.com

  4. #4
    Join Date
    Feb 2009
    Location
    Southern Vancouver Island
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    4,546

    Default Re: Improper starter course - 3 tab shingle

    There is another possibility - they may have stripped off the first roof layer, but thought the original starter strip was good enough to reuse. Seen that too.

    John Kogel, RHI, BC HI Lic #47455
    www.allsafehome.ca

  5. #5
    brianmiller's Avatar
    brianmiller Guest

    Default Re: Improper starter course - 3 tab shingle

    its improperly installed because ? two layers are allowed.


  6. #6
    Join Date
    Aug 2007
    Location
    Memphis TN.
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    4,311

    Default Re: Improper starter course - 3 tab shingle

    Quote Originally Posted by brianmiller View Post
    its improperly installed because ? two layers are allowed.
    Starter Strips do not have tab slots.

    It Might have Choked Artie But it ain't gone'a choke Stymie! Our Gang " The Pooch " (1932)
    Billy J. Stephens HI Service Memphis TN.

  7. #7
    Join Date
    Feb 2009
    Location
    Southern Vancouver Island
    Posts
    4,546

    Default Re: Improper starter course - 3 tab shingle

    Quote Originally Posted by brianmiller View Post
    its improperly installed because ? two layers are allowed.
    The slots in the starter strip, which appears to be old shingles, are lined up with the new shingles. The starter strip looks old and brittle. The OP says the starter strip has leaked and destroyed some of the sheathing. There is no underlay. Need more?

    No warranty for two layers.

    John Kogel, RHI, BC HI Lic #47455
    www.allsafehome.ca

  8. #8
    Join Date
    Aug 2007
    Location
    Memphis TN.
    Posts
    4,311

    Default Re: Improper starter course - 3 tab shingle

    Quote Originally Posted by John Kogel View Post
    Need more?
    Why Yes, I would like a bacon Sandwich.

    It Might have Choked Artie But it ain't gone'a choke Stymie! Our Gang " The Pooch " (1932)
    Billy J. Stephens HI Service Memphis TN.

  9. #9
    Join Date
    Nov 2009
    Location
    St Paul, MN
    Posts
    1,628

    Default Re: Improper starter course - 3 tab shingle

    Quote Originally Posted by brianmiller View Post
    its improperly installed because ? two layers are allowed.
    Not everywhere. In this part of MN only a single layer is allowed.

    MinnesotaHomeInspectors.com
    Minnesota Home Inspectors LLC
    ASHI #242887 mnradontesting.com

  10. #10
    Join Date
    Aug 2011
    Location
    Bennett (Denver metro), Colorado
    Posts
    1,394

    Default Re: Improper starter course - 3 tab shingle

    Quote Originally Posted by Ken Rowe View Post
    Not everywhere. In this part of MN only a single layer is allowed.
    Ditto here.

    If you choose not to decide, you still have made a choice.

  11. #11
    Join Date
    Dec 2008
    Location
    Maryland
    Posts
    2,777

    Default Re: Improper starter course - 3 tab shingle

    I have been following this thread and have to say it would confuse someone dropping in that had no roofing experience. It may in the use of terms and regions.

    The first picture shows that a roofover was done. The 2nd roof layer was incorrectly started. There is no starter strip shown, only the old (1st) roof shingle. The old roof shingle would not be called a starter strip. It may be the strip where they started but it is not a starter strip. In the OP 1st picture the starter strip is the strip under the original (old) first course of shingle.

    Some regions may find it exceptable not to install a starter strip and to install the first course over the existing shingle and then to seal it (new shingle) down to old shingle. In that event the new shingle tab slots should not fall over the old shingle tab slots as shown in the first picture of the OP. There are a couple of ways to correct the OP installation but that may be for another thread...

    One of the reasons to use a starter strip is so that there is something for the first course of shingle , lower edge, to seal to and resist lifting due to wind.

    Personally I like to see the first course of the old shingle cut back (tabs cut off). Then a starter strip (new shingle) installed. Or better yet to tear off the first 36" and install Ice/Water Shield, since it was not there from the roof installation 20 or 30 years ago.

    For general comment a starter strip is a shingle that has had its tabs removed and then nailed so that the rack/tar strip will be under the lower edge of the first course. Thus when it heats up and sticks to the shingle above it will offer resistance to being lifted by the wing. Nails in the starter strip are spaced so that they will not be exposed when the first course is set over it.

    Last edited by Garry Sorrells; 10-26-2013 at 05:22 PM.

  12. #12
    Join Date
    Jul 2008
    Location
    Snowbird (this means I'm retired and migrate between locations), FL/MI
    Posts
    4,086

    Default Re: Improper starter course - 3 tab shingle

    At first glance, it appears the eave (to the hip) may have been cut back and that gutters have been retrofit/installed (incorrectly and) more recently than the newest roof covering was applied (to either the latest addition/extension) & the previous to different roofing materials were incorporated (into the earlier installed roofing at the valley). The gutter over the O/H garage door also appears (at first glance) to be a cut-back post-roofing retrofit.

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    Last edited by H.G. Watson, Sr.; 10-26-2013 at 10:53 AM.

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