Do I need through wall flashing where roof interests stone wall?
 

In short:
Can water penetrate a wall of limestone and mortar?
Should through wall flashing be installed where a wall intersects a roof?
Is this a code violation not to do it and if so, which code specifically?
This web site would seem to indicate it is a code violation:
http://www.realestateinspector.com/n...r/flashing.htm which states:
begin web site copy

2000 International One & Two Family Dwelling Code

R703.8 Flashing.

Approved corrosion-resistive flashing shall be provided in the exterior wall
envelope in such a manner as to prevent entry of water into the wall cavity
or penetration of water to the building structural framing components. The
flashing shall extend to the surface of the exterior wall finish and shall
be installed to prevent water from reentering the exterior wall envelope.
Approved corrosion-resistant flashings shall be installed at all of the
following locations:

* At top of all exterior window and door openings in such a manner as to be
leak proof, except that self-flashing windows having a continuous lap of not
less than 11/8inches (28 mm) over the sheathing material around the
perimeter of the opening, including corners, do not require additional
flashing; jamb flashing may also be omitted when specifically approved by
the building official.

* At the intersection of chimneys or other masonry construction with frame
or stucco walls, with projecting lips on both sides under stucco copings.

* Under and at the ends of masonry, wood or metal copings and sills.

* Continuously above all projecting wood trim.

* Where exterior porches, decks or stairs attach to a wall or floor assembly
of wood-frame construction.

* At wall and roof intersections.

* At built-in gutters.

end web site copy



In detail:
I am having a new home built and the roof and stone work have just been
completed. I looked at it and noticed that may be an issue on the walls
above a bay window and front porch
See pictures:
http://pws.prserv.net/usinet.lhirsch/MVC-007X.JPG
http://pws.prserv.net/usinet.lhirsch/MVC-004X.JPG

Counter flashing is being installed but is not yet installed in the second
picture above. There is hard sheathing and a thin blue foam type house wrap
behind all of the stone. The problem I see is that there is not any sheating
or flashing where the stone sits on the roof decking/and/or other framing
supports. The stone sits directly on the wood.

You can see the back (inside) of the window he
http://pws.prserv.net/usinet.lhirsch/MVC-002X.JPG

A close up showing the stone and mortar on the wood is he
http://pws.prserv.net/usinet.lhirsch/MVC-003X.JPG

The back (inside attic) of the front porch wall is he
http://pws.prserv.net/usinet.lhirsch/MVC-005X.JPG

Can water penetrate the stone and mortar and run down the back of the stone
until it hits the wood and cause problems? The stone is about three inches
thick.

My guess is that there would have to be SO much rain for this to happen that
while possible, it is not practical to happen. In order to get the builder
to fix it, I would have to show a code violation. Is this a code violation?
Any response would be appreciated.

Thank You-

Do I need through wall flashing where roof interests stone wall?
 

Go to BIA (Brick Industry Association) web site.
Look in Tech Notes section.
Their opinion is that brick & mortar are not waterproof.
They also say that brick should not be supported on wood frameing.

If your climate is dry, you might get away without through wall
flashing.

TB

Do I need through wall flashing where roof interests stone wall?
 

Call the building inspector responsible for your house for code
violations. He is the ultimate authority, even beyond what is written.
If he says it's OK, it's ok even if it is written differently
elsewhere.

I would not use the realestateinspector site as a reference. While most
of what is said is true, there are comments made that are out of
context. In one picture it is stated that water running off the roof
will run behind a piece of trim. However, water won't be running off
the roof when the gutter is installed. A comment is made about caulking
when it is evident that caulking has not been completed yet. Simple
statements like that, while having merit, are not conclusive due to the
stage of construction and should not be used.

As to your problem, the stone should not be supported by the roof and
that is the way it appears, so flashing is a mute point.


--
hwm54112
------------------------------------------------------------------------
hwm54112's Profile: http://www.homeplot.com/member.php?userid=127
View this thread: http://www.homeplot.com/showthread.php?t=60470