Yes.
The upper vertical edge of that Z-flashing goes behind the upper piece of siding, the lower edge overlaps the lower piece of siding on the outside. A gap is left between the bottom of the top piece of siding and the flashing.
RHello:
Moved into a house that has T1-11 vertical siding.
At the bottom, the siding is "finished off" with a horizontal board that runs the width of the house. Typical pine board, perhaps 6" X 3/4 x ...
The bottom edges of some of the siding (rests on top of the 3/4 board edge) has wicked up water over the years, and looks as if I'll have to replace some of it. Also, a new horizontal board, as it does improve the looks.
It has been suggested that I make sure to have the bottom edge of the siding where it meets the horizontal board be flashed with a "Z Flashing". Certainly sounds like a good idea.
Found a picture of Z flashing on the web, and my question relates to the top most vertical edge of the flashing: Obviously there can't be a perfect seal here between the edge of the AL flashing and the face of the siding board.
When it rains, due to small gaps between, or just capillary action, I would imagine water seeps in and probably migrates to the bottom siding edge (again).
Is this anything to worry about ?
Is the paint that goes over all of this supposed to seal it adequately, or should one run a small bead of RTV here, or... ?
Any thoughts on all of this would be most appreciated.
BTW: T1-11 still used and available ?
Thanks, Bob
More precisely, IMHO, the up leg of the "Z" flashing goes behind any weather barrier ( housewrap or building paper ) that is behind the siding. It then directs water out and over the bottom horizontal trim piece.
As Rico notes, space should be left below the T1-11, or water will continue to wick up into the unprotected end grain of the plywood.
TB
Ever the optimist! Many times the T-1-11 gets put up directly on the studs. It's a cost saving measure, right? Let's save on that expensive building paper while we're at it. The building paper goes over the plywood, right? Can't have it over the T-1-11. Lose it!
RT-111 is a massive problem due to the poor manufacturing process that leaves voids and also problems with ply glued properly. T1 11 is going to soak in moisture eventually I would think having a corrugated rainscreen behind it would dry the back out. Even painting the back may cause moisture to be trapped in the sheet. If possible use Hardie lap siding with Plywood And corrugated Vapor Barrier underneath.
I would paint the studs with two layers of paint let it dry thoroughly then use a very permeable wrap behind the t-111
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