Water table trim-house wrap terminates at it or goes under it?
Ryan_SLC
| Posted in General Questions on
Hey all,
I’ve learned that one possible way to transition from my foundation to my sheathing (which is generally flush with each other) is a trim piece called the water table.
I’m googling but not finding much details on how the house wrap works here.
Does the water table drip attach on top of the water screen (I’m using mesh wrap) and house wrap and that drip edge is just for the cladding front water drainage, or is the water table behind the rain screen and main house wrap?
I’m clearly misunderstanding. Any tips?
Thank you kindly.
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Replies
A narrow piece of house wrap behind the trim board. This runs up and under the main house wrap. A piece of metal flashing on the top edge of the trim, the main house wrap goes over the metal flashing. If you want to be really diligent you seal the top of the metal flashing to the lower house wrap with a piece of Vycor or similar and then lay the main house wrap over it.
If I can rephrase better.
The water table is behind the rain screen (I'm using a mesh material) or is on the rain screen?
I think you answered, but I need to confirm with my neophyte understanding of things.
Thanks!
https://www.finehomebuilding.com/2020/10/23/exterior-pvc-trim-water-table-and-cap
Ha! that's the exact video I got the idea from.
However, he's not shown the drip edge under. Zip or house wrap can't just terminate without a drip?
The video almost isn't "good" because it's unlikely that zip/coravent is hitting the ground. So the whole process is missing the foundation, the point of the water table...I thought?
I mean, he sold me. I already have the window drip edge he's using coming from Home Depot. But still missing the foundation in the video.
I would waterproof behind your rain screen over your foundation, run your rain screen, then put your water table trim on top, this would allow water to drain freely without hitting the water table and then having to drain out.
That drip he’s using is more aesthetic, but will allow siding water to drip out rather than in to rain screen.
Same guy for continuity…. https://www.finehomebuilding.com/project-guides/insulation/installing-zip-system-sheathing-sheathing-to-foundation-connection
freyr_design,
That's how I have always done it, but that was with a conventional rain-screen, so you got the benefit of the open air-space at the bottom. With regular or dimpled house-wrap I don't think it matters much which way you do it.
Thank you Freyr! Great follow up and I greatly appreciate it!