On Sun, 12 Jul 2020 06:19:20 +1000, Rod Speed wrote:
The house was built on this suburban lot about 60 years
The subsidence has been very slow. In fact it is a not an
uncommon occurrence. Concrete driveways sometimes subside
and there are companies that offer a "pump it up" solution
as a cheaper alternative to replacement.
I'm not concerned about sinkholes. I just want to know
if exposing 12-18" of the top basement wall poses any
Slow is a good sign, I'd still want to understand why that dirt left.
A 12-18 inch hole near the house should be collecting water,
that's NOT good. Fill it in. If there is a surface water issue,
dig a trench, add gravel, a perforated pipe, etc. Check YouTube
for fixing drainage issues.
On Saturday, July 11, 2020 at 4:51:53 PM UTC-4, F Russell wrote:
Sounds like it's a hole that's ugly and can fill with water. The ground
should be graded away from the house. Fill it in. I'd check where the
gutter water is going. Get out there in a heavy rain, you may find it's
not flowing where you think it is. I had water coming into a spot in
my basement, everything looked OK outside when it wasn't raining. Went
out in a heavy rain and realized water was backing up in one of those
corrogated pipes that was pulled up over a downspout, but not high enough.
Water was gushing out right at the foundation.
This sounds like they back filled over the construction trash and it
is rotting away. Many years ago, this was not uncommon until building
departments started managing the construction trash. Now dumpsters are
required on site as soon as the first crew starts working along with a
porta potty, unless you are out in the boonies, beyond the permit and
I'd want to know why before you get serious foundation damage. In
Florida there has been a lot of sink holes that actually swallowed up
entire houses. You may need professional help.
If nothing else, I'd drive a long rod into the ground to see if it hits
an open spot.
You don't want water pooling near the foundation and possibly seeping in
so once you find out why it happened, fill it to slope away from the
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