Is it really that bad for a home on a slab foundation to have water standing
an inch or inch and a half deep on one side immediately following very heavy
rains? We have had six or six and a half inches of rain in the area over
the last few days, and in back it is not draining away as rapidly as it is
in front. The whole back yard in basically under an inch of water, but you
don't find this out until you walk out in it and mash the grass down. And
the wife is convinced that we have to raise the level of the back yard in
the next couple of weeks if we are to avoid a cracked slab. I am willing
and able, but I really wonder if she is not blowing things out of
proportion. Can anyone else chime in and illuminate the matter for me a
bit, please? Sorry to be so ignorant, but I just don't understand the
magnitude of the of it all.
With the limited information in your post a definitive recommendation
is not realistic. However, your (wife's) concerns are certainly valid.
An assessment and plan from a qualified engineer would be a good place
to start. If front to back drainage is necessary, then you will have
plans for city hall to issue the required permits, and specs for
bidding from local contractors. Or, you may get lucky and learn that
such situations are nothing to worry about. You might even find that
the developer should not have graded in this fashion, and a bit of
legal pressure is advisable. Take a step at a time and good luck.
No real question that you need answered is stupid. Trolls asking unless
questions or comments we treat rather harshly.
6 --- 61/2" of rain over a few days sounds like an abnormal amount just
about any where. That would be my first question to you.
If this is a regular thing, the standing water, then you may have a
potential problem. Sometimes the developer doesn't get the grading quite
right in a slab neighborhood.
Raising the back yard may not be an acceptable solution since development
regulations in most modern subdivisions expressly forbid the homeowner from
doing anything that changes the water flow patterns as created by the
Get back to us with more info.
Please come visit http://www.househomerepair.com
Thickness of slab?
Type of slab (cable tension?)?
I would not worry for the moment. Many houses have floods (Hurricanes)
without slab damage. Other areas get 10-20 inches of rain. It takes
days for the saturated soil to drain.
I would grade the back lot to reduce standing water in the future.
Thanks, all for the feedback and input. I do appreciate it. Will talk with
the wife and try to find someone appropriate to consult. And thanks for the
gentle replies. :)
Just for further info, this is outside of Houston, on "gumbo" soil (high
degree of clay, I suppose, very little organic matter and no sand or stone)
and only happens with very heavy rains over a short period of time. Still,
the wife is concerned.
Forgot to mention, I don't know the thickness of the slab but it looks like
14 or 15 inches at least, and at one time the previous owners had it
repaired (due to crack? don't know) by jacking it up (I believe) and placing
bell towers under it, then pouring concrete in around the bell towers to
provide greater strength and stability (I suppose). This from a neighbor
(now deceased) who moved into the the neighborhood from the start, lived
next door, and was well versed in its history. House was built in 1958, I
believe. We have had it since 2004, and at one point had someone come out
and measure (using a GPS system of some sort) to see how level it all was.
Results showed it was level to within 5/8 of an inch from one diagonal
corner to another, IIRC. That was right before we had it remodeled, and the
contractor found that the A/C had been sweating onto the main support beam
of the house for 20+ years, which was by then half-rotten. He replaced
that beam somehow, and we have not had any trouble with cracks in the walls
etc. since that time.
Just thought I would add this bit.
I dunno. With amount of rain you just received, I would turn off the
soaker hoses for a few days and let the water drain.
Seems like a conflict of interest. You need water too prevent dry clay
and foundation problems, but a few days of rain would possibly cause
the slab to crack?
/DIY chime off
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