"Z Flashing" A Bottom T1-11 Siding Edge ?
 

Hello:

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

Robert11 wrote:
Hello:

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 ?

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.

R

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

wrote:
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.

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!

R

"Z Flashing" A Bottom T1-11 Siding Edge ?
 

T-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.

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For full context, visit https://www.homeownershub.com/mainte...dge-11821-.htm

"Z Flashing" A Bottom T1-11 Siding Edge ?
 

I would paint the studs with two layers of paint let it dry thoroughly then use a very permeable wrap behind the t-111

--
For full context, visit https://www.homeownershub.com/mainte...dge-11821-.htm

"Z Flashing" A Bottom T1-11 Siding Edge ?
 

Design Studio writes:

T-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.

You guys on homeowners keep trying to set new records.
Congratulations.

You may or may not know this, but most of the posts on homeowners hub
are actually from Usenet.

On Usenet, we don't see old posts, only the most recent posts and replies.
The post you just replied to is 15 years old. Please check
the dates and if you feel you must reply, please include the
original post in your reply.

Better yet, get a Usenet account. You can do this for free.


--
Dan Espen

"Z Flashing" A Bottom T1-11 Siding Edge ?
 

"Design Studio" wrote in
message roupdirect.com...
T-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.

15 years ago this time.

--
For full context, visit
https://www.homeownershub.com/mainte...dge-11821-.htm

Lonely Obnoxious Cantankerous Auto-contradicting Senile Ozzie Troll Alert!
 

On Mon, 25 Jan 2021 05:26:43 +1100, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

FLUSH troll****

--
Richard addressing senile Rodent Speed:
"**** you're thick/pathetic excuse for a troll."
MID:

"Z Flashing" A Bottom T1-11 Siding Edge ?
 

On Sun, 24 Jan 2021 16:45:02 +0000, Design Studio posted for all of us to
digest...


T-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.

What question is this reply in regard to?

--
Tekkie