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  1. #1
    mathew stouffer's Avatar
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    Default Butterfly roof valley installation

    This looks like a leaker to me, but I was curious if this is a typical valley installation for this type of roof.

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  2. #2
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    Default Re: Butterfly roof valley installation

    the installation screams POS, especially in snow country. would you like a roof design like that for your house. a little over framing with a ridge and a few valleys come to mind


  3. #3
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    Default Re: Butterfly roof valley installation

    Quote Originally Posted by mathew stouffer View Post
    This looks like a leaker to me, ...
    They are ... usually anyway.

    ... but I was curious if this is a typical valley installation for this type of roof.
    Unfortunately, yes.

    That looks like regular 90# granular surfaced roofing, which is not intended to be left exposed to sunlight. Is that fiberglass mat based or modified bitumen instead of felt mat based?

    That fish mouth wrinkle is going to allow water to enter.

    Those valleys really "should have" a cricket/saddle installed to create a ridge at the center and 4 separate sloped valleys, 2 draining toward each end of that valley.

    Jerry Peck, Construction / Litigation Consultant
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  4. #4
    mathew stouffer's Avatar
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    Default Re: Butterfly roof valley installation

    Jerry, not sure. Here is the closest pic I have.

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  5. #5
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    Default Re: Butterfly roof valley installation

    Mat,

    The way to check is to try to tear the edge. If it stretches, it's modified, it it tears rather easily and leaves a some fuss along the edge, it's most likely felt mat, if it tears a bit hard and leaves fiber glass fragments sticking out along the edge, it fiber glass mat.

    Hopefully, it stretches.

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

  6. #6
    mathew stouffer's Avatar
    mathew stouffer Guest

    Default Re: Butterfly roof valley installation

    Fiberglass and felt mat are not rated for that installation?


  7. #7
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    Default Re: Butterfly roof valley installation

    Quote Originally Posted by mathew stouffer View Post
    Fiberglass and felt mat are not rated for that installation?
    Some, possibly most, maybe even all, fiber glass mat granular surfaced 90# roll roofing is.

    No organic felt mat granular surfaced 90# roll roofing is to my knowledge. The organic felt mat stuff simply deteriorates too quickly in the sunlight and weather.

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

  8. #8
    mathew stouffer's Avatar
    mathew stouffer Guest

    Default Re: Butterfly roof valley installation

    Ok, this may be a dumb question, but how can you have a roofing material not rated for exposure to sunlight.


  9. #9
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    Default Re: Butterfly roof valley installation

    "Ok, this may be a dumb question, but how can you have a roofing material not rated for exposure to sunlight."

    Good question...LOL

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

  10. #10
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    Default Re: Butterfly roof valley installation

    Mathew
    That is the wrong material (Roll roofing) for use in that locataion (butterfly valley). Also, roll roofing has a much shorter usable life than 3 tab shingles. I would expect it to have serious leaking problems any time from, NOW to 5 years, (most likley NOW).

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

  11. #11

    Default Re: Butterfly roof valley installation

    Nothin like installing the cheapest membrane possible at one of the weakest point of a roof. I'll take it back if it's mod. bit., but I don't think it is.


  12. #12
    mathew stouffer's Avatar
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    Default Re: Butterfly roof valley installation

    Thanks guys. I can't believe no one commented on the angle of the photo


  13. #13
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    Default Re: Butterfly roof valley installation

    o.k. matthew i'll give it a shot. you are a knuckle dragger! it looks like you would have to have 6' long arms to get that picture?


  14. #14
    mathew stouffer's Avatar
    mathew stouffer Guest

    Default Re: Butterfly roof valley installation

    Come on Brian, how many knuckle dragger inspectors do you know I assume you are refering to snow boarding. Anyone can do that, I like a bit of a challenge.


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