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Re: Have you heard of watering your foundation?
- To: <seaint(--nospam--at)seaint.org>
- Subject: Re: Have you heard of watering your foundation?
- From: "M. David Finley, P.E." <pec(--nospam--at)isgroup.net>
- Date: Mon, 18 Nov 2002 13:01:38 -0500
Instead of watering, couldn't a french drain system
be provided in order to keep the clay at a low moisture content?
M. David Finley, P.E.
2086 SW Main Boulevard - Suite 111
----- Original Message -----
Sent: Monday, November 18, 2002 12:54
Subject: Re: Have you heard of watering
I was asked this question by my brother who is building a house in
the Dallas area. I am a structural engineer in New York state and my
response was- What? Why? I have not heard of this practice and neither has
anyone I work with. The people he has spoken to (who are not engineers)
saythat if you don't water the
concrete it somehow loses strength and cracks. The only thing I can figure
is that the clay soil there has not been preconsolidated by glaciers as it
has here and the moisture is kept up to prevent consolidation and settlement
of the house. Am I on the right track?Bruce C. Trobridge PE
Senior Building Structural
NYS - Office of General Services
North Texas has a large area of expansive clays with tremendous
shrink-swell potential. Geotechnical reports commonly give PVR
(Potential Vertical rise) estimates for our soils. The Woodbine formation
which runs from just on the east side of Fort Worth in an ESE direction can
have a PVR of up to 8 inches. Due to our expansive soils, it is common
practice to "water your foundation" on a weekly practice to prevent the soils
from drying out. Soaker hoses should be laid along the foundation and used
every two weeks during a dry spell. The intent is to ensure a constant
moisture condition around the perimeter of the foundation to reduce the
Davis G. Parsons II, PE RA AEI
a practical architectural
in Fort Worth, Texas