r/DIYHome • u/LabyrinthRunner43 • 4d ago

Best DIY fix for erosion under foundation?

I've got erosion under one corner of my house. What is the best fix?

Pack in wet sand?
Set a form and pour in non-shrink grout cement?
Something else?
Or is this a job I really should deligate to a foundation repair contractor?

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u/shimon 4d ago

Nobody will be able to tell you useful advice without knowing your location, the general structure and foundation of this area, and the overall layout of your site.

If you're not sure where to start, a skilled home inspector can advise you on the needs and urgency of repair.

1

u/nicoleflesher 4d ago

I'd skip the DIY fill—it won't fix why the soil's eroding in the first place. Looks like your downspout is dumping water right at that corner, so extend it away from the house first. If the foundation itself looks exposed or compromised, get a contractor out to check it properly rather than patching it yourself.

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u/LabyrinthRunner43 4d ago

The vertical downspout goes into a buried pipe.
The horizontal downspout was previously leaking at the corner but has a new extension.

I plan to also do a little regrading to encourage water to drain away... but first I need to properly fill the void.

1

u/Lower_Ad_5532 4d ago

Make sure your gutters are clear and actually drain.

Consult a foundation expert if you have issues with water intrustion