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  1. #1
    Join Date
    Nov 2011
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    7

    Default Drip edge, above window or above trim?

    We just installed a new four-panel dual-sliding patio door. In the installation manual, they call for putting a drip cap directly above the installed patio framing...

    I will be putting a 1x4 trim around the door. I have seen various houses where the drip cap is above the trim...

    So, where do I place my drip cap? Above the door framing, or above the trim?!

  2. #2
    Join Date
    Nov 2011
    Posts
    7

    Default Re: Drip edge, above window or above trim?

    In studying it further, I think I've talked myself into following the instructions (imagine that!) and placing the drip cap immediately above the door. Reason being:

    If water somehow gets behind the upper trim and siding caulk, it will fall down onto the house wrap which overlaps the door flashing, which will overlap the drip cap which will then make it way back to the exterior.

    Tom

  3. #3
    Join Date
    Mar 2008
    Location
    nova scotia, canada
    Posts
    1,522

    Default Re: Drip edge, above window or above trim?

    i actually flash both when doing this sorta detail, the door gets flashed with a peel and stick flashing either blueskin or vycor. as its a self sealing membrane the nails from the trim will be sealed, after that i put a metal cap flashing over the trim. never had issues this way
    fire up the saw and make some dust

  4. #4
    Join Date
    Jul 2010
    Location
    SoCal
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    5,084

    Default Re: Drip edge, above window or above trim?

    I would cap the trim, you don't want water behind it, if you can avoid it.

  5. #5
    Join Date
    Mar 2008
    Location
    nova scotia, canada
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    1,522

    Default Re: Drip edge, above window or above trim?

    i should add, i use 6" vycor for the nailing flange of doors and windows.. so when the metal goes on its overlapping the peel and stick.. the cap flashing gets back caulked to along the top edge where it meets the wall plus on the ends
    fire up the saw and make some dust

  6. #6
    Join Date
    Nov 2011
    Posts
    7

    Default Re: Drip edge, above window or above trim?

    Thanks all for the help. I put a metal drip cap over the door as the instructions called for, then placed a self-adhesive 6" flashing over that. The house wrap then folded down over both.

    I am going to install the trim and then use another drip cap on top of that. It's a lower profile than I thought so I won't mind putting it up there, and like was commented, I'd rather not just have caulk to prevent water from getting behind it.

  7. #7
    Join Date
    Mar 2008
    Location
    nova scotia, canada
    Posts
    1,522

    Default Re: Drip edge, above window or above trim?

    good stuff.the only water you should be dealing with is the wet stuff you spill from your glass or if you leave the door open in a storm
    fire up the saw and make some dust

  8. #8
    Join Date
    Jan 2010
    Location
    Northern Virginia
    Posts
    975

    Default Re: Drip edge, above window or above trim?

    I think the best "rule" is to place the flashing over whichever sticks out the farthest, in some cases that's the window unit, but if you have brick mold or 6/4 trim that overhangs the unit, put the drip edge on the trim.
    Casey
    Remove not the ancient landmark, which your fathers have set.

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