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  1. #1
    Join Date
    Mar 2007
    Location
    Nampa, Idaho
    Posts
    601

    Post Concrete slate roof installation

    This place has damaged fascia and signs of water penetration below soffit in many areas. As you can see in the photos the roof tapers inward and shingles slope toward end caps. Sealant has been applied as you can see in the photo. Water appears to have entered below end cap shingles. I don't see to many concrete tile roofs in my area. This appears to be a bad design and improper installation for end cap shingles.

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  2. #2
    Join Date
    Mar 2007
    Location
    Fletcher, NC
    Posts
    28,032

    Default Re: Concrete slate roof installation

    What I don't see is drip edge.

    The rake tiles do not need, are not supposed to need, to be "sealed" against water. They, and the ridge tiles, should be pointed up with mortar to keep the wind out so the tiles do not blow off, but tile roofs are not "water tight" in their own right - they rely on the tile roof underlayment installed under the tiles for that.

    Without drip edge, and with the gutter attached as shown over the fascia without drip edge over the top of the gutter from above, the fascia will rot out. Like you found. From the photos it looks like the only protection there is to keep the fascia from rotting out is "paint" ... and we all know "paint" does not work well for that when water is trapped against it and put into corners, or allowed so soak into the wood for repeated long durations.

    Jerry Peck
    Construction/Litigation/Code Consultant - Retired
    www.AskCodeMan.com

  3. #3
    Join Date
    Mar 2007
    Location
    Nampa, Idaho
    Posts
    601

    Default Re: Concrete slate roof installation

    Yes the lack of drip edge flashings is a problem. However the soffit has signs of water penetration in other areas than just the lower edges of roof. Soffit is damaged up the rake of the roof where roof slopes toward rake tiles.


  4. #4
    Join Date
    Feb 2009
    Location
    Southern Vancouver Island
    Posts
    4,607

    Default Re: Concrete slate roof installation

    Quote Originally Posted by Trent Tarter View Post
    Yes the lack of drip edge flashings is a problem. However the soffit has signs of water penetration in other areas than just the lower edges of roof. Soffit is damaged up the rake of the roof where roof slopes toward rake tiles.
    Yes you are right. That lower row of ridge cap shingles should be removed IMO. Maybe Otis did a poor job of cutting those angled tiles, so covered the messy edge with capping tiles?

    Drip edge flashing is a simple and effective way to keep the fascias dry, and roofers should learn about it.

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

  5. #5
    Join Date
    Mar 2007
    Location
    Fletcher, NC
    Posts
    28,032

    Default Re: Concrete slate roof installation

    Quote Originally Posted by John Kogel View Post
    That lower row of ridge cap shingles should be removed IMO.
    No need to remove those rake tiles ... if the roof tile system was installed correctly ...

    Drip edge flashing is a simple and effective way to keep the fascias dry, and roofers should learn about it.
    Yep, roofers try to save $100 and it comes back and costs them $$THOUSANDS$$ to correct it.

    Jerry Peck
    Construction/Litigation/Code Consultant - Retired
    www.AskCodeMan.com

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