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Old 03-20-2017, 08:17 AM   #1
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Window Drip Cap for PVC Trimboard


Hi Everyone,
I am installing clapboard siding with PVC trim board around windows and doors. My wall structures looks like:
Sheathing
House Wrap
Self Adhesive Window Flashing
1.5" Foam
3/4" rainscreen
Siding


Most of what I am reading is that a drip cap is still required but most of the homes I see near by that have PVC trim and clapboard do not appear to have any drip caps installed?

Thoughts?

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Old 03-20-2017, 08:55 AM   #2
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Re: Window Drip Cap for PVC Trimboard


I'd still want a Z mold and a kick out strip installed above the trim to tip the siding out slightly so the water runs past the trim not behind it.
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Old 03-20-2017, 02:06 PM   #3
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Re: Window Drip Cap for PVC Trimboard


+1

Drip cap above the trim.
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Old 03-20-2017, 06:29 PM   #4
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Re: Window Drip Cap for PVC Trimboard


Thanks for the replies, just to be 100% clear, your advice doesn't change adding that the windows are new construction vinyl with caulked nailing flange (except bottom).

I assume you would recommend the same but i have seen others talking about this situation and said a drip cap was not required.
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Old 03-20-2017, 06:44 PM   #5
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Re: Window Drip Cap for PVC Trimboard


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Originally Posted by joecaption View Post
I'd still want a Z mold and a kick out strip installed above the trim to tip the siding out slightly so the water runs past the trim not behind it.
To be clear, the Z mold would be between foam and exterior? If there was no foam, i know it would be integrated with WRB but assuming because of the 1.5" of foam, it would be installed after foam?
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Old 03-20-2017, 07:09 PM   #6
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Re: Window Drip Cap for PVC Trimboard


The top leg of the Z flash, or drip cap should tuck up underneath your house wrap
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Old 03-27-2017, 11:21 AM   #7
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Re: Window Drip Cap for PVC Trimboard


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Originally Posted by Yodaman View Post
The top leg of the Z flash, or drip cap should tuck up underneath your house wrap

I am assuming that drip caps are generally custom bent for walls with foam? I cant seem to find a pre-made drip cap wide enough for my application to reach through foam to get behind WRB.
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Old 03-27-2017, 11:48 AM   #8
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Re: Window Drip Cap for PVC Trimboard


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Originally Posted by JTD83 View Post
I am assuming that drip caps are generally custom bent for walls with foam? I cant seem to find a pre-made drip cap wide enough for my application to reach through foam to get behind WRB.

Yes, they are generally made on site with a brake. You might consider renting one for a day and bending up all the flashing that need.

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