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RE: Repairing Cracked Masonry

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Stan,
I have had problems with silicone calking in masonry. It leached into the masonry and caused discoloration. I would consider a polyurethane calking for sealing masonry.

Regards,
Harold Sprague

From: "Caldwell, Stan" <scaldwell(--nospam--at)halff.com>
Reply-To: <seaint(--nospam--at)seaint.org>
To: <seaint(--nospam--at)seaint.org>
Subject: RE: Repairing Cracked Masonry
Date: Tue, 9 Nov 2004 11:53:29 -0600

Rand:

I suspect that your proposed solution will simply cause new cracks
elsewhere.  What about caulking all of the cracks with GE silicone, or
equivalent?  That might not be very pretty, but it ought to keep the
water out.

HTH,

Stan R. Caldwell, P.E.
Dallas, Texas

-----Original Message-----
From: Rand Holtham, P.E. [mailto:rand(--nospam--at)sigmaengineers.com]
Sent: Tuesday, November 09, 2004 11:49 AM
To: seaint(--nospam--at)seaint.org
Subject: Repairing Cracked Masonry


Lister,

For the sake of brevity I will condense a very complex problem into a
simple
question that I have no answer for:
I have a large crack (actually many large cracks) in the brick veneer on
an
eight story building. This crack allows water to penetrate the building
and
attempts to caulk have been unsuccessful as the crack moves thereby
dislodging the caulk. I am contemplating the addition of a small  (say
#2)
rebar in the grout joint  (grind out joint repoint with epoxy mortar or
other?) so that the reinforcing crosses the crack in essence stitching
the
crack together. Then applying the caulk with the idea that the added
reinforcing will control the crack from movement beyond that which the
caulk
can tolerate. I can see extending the reinforcing 24" or 36" on each
side of
the crack This is not to stop the building movement but to facilitate
waterproofing the brick facing.

My simple question is--- will the rebar bond well enough to the brick
and
mortar for this to be effective? Any thoughts will be greatly
appreciated
~:-).


Rand


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