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Garage Sunken Corner Help

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  • Apr 13th, 2021 7:58 pm
[OP]
Newbie
Mar 16, 2019
42 posts
23 upvotes

Garage Sunken Corner Help

Hi,
I noticed a few days ago a corner of my garage has sunken down. It must have happened over the past 3 months because it was not there in December. Any ideas what the cause would be and what I should be doing or who I should contact?

House was built in 2010

Thanks in advance
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14 replies
Sr. Member
Mar 10, 2004
793 posts
292 upvotes
Any cracks on the wall? I d be more concerned about wall cracks than floor cracks. If no wall cracks i wouldn t be too concerned. You might want to look outside for potential water damage.
[OP]
Newbie
Mar 16, 2019
42 posts
23 upvotes
tempperm wrote: Any cracks on the wall? I d be more concerned about wall cracks than floor cracks. If no wall cracks i wouldn t be too concerned. You might want to look outside for potential water damage.
Thanks for the response. There is no crack on the wall.
I did find outside of the garage the area also sunken down.
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Deal Addict
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Sep 27, 2006
4822 posts
1715 upvotes
Not so easy there Ma…
Do you have a rain downspout that exits to the ground nearby? If so that could be the possible issue.
Deal Expert
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Feb 8, 2014
24575 posts
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Socially Distanced
Username check out Winking Face

I wonder of the ground settled. You might consider having an appropriate engineer check things out, though that would have a cost involved.
In fact in Rand McNally they wear hats on their feet and hamburgers eat people
[OP]
Newbie
Mar 16, 2019
42 posts
23 upvotes
fergy wrote: Do you have a rain downspout that exits to the ground nearby? If so that could be the possible issue.
Thanks Fergy
There is downspout on the other side of the wall. I have the water flowing away from the house.
[OP]
Newbie
Mar 16, 2019
42 posts
23 upvotes
Quentin5 wrote: Username check out Winking Face

I wonder of the ground settled. You might consider having an appropriate engineer check things out, though that would have a cost involved.
Thanks Quentin5, I’ve reached out to some foundation repair companies just waiting to hear back
Deal Expert
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Feb 8, 2014
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Bottomlesspit wrote: Thanks Quentin5, I’ve reached out to some foundation repair companies just waiting to hear back
Thats a good idea but bear in mind they won't be actual engineers.
In my experience proper training and credentials makes a big difference when dealing with big unknowns.
In fact in Rand McNally they wear hats on their feet and hamburgers eat people
Deal Addict
Jun 8, 2004
1906 posts
944 upvotes
Oakville
Are you sure it was the foundation that sank vs the garage floor has heaved upwards?

Foundations are usually set deep below frost line, and shouldn't heave up or down. On the hand, the garage floor is normally just poured over top of a gravel base and can heave up and down in the winter. The garage floor is not normally tied into the foundation, and is poured separately after the foundations are poured.
[OP]
Newbie
Mar 16, 2019
42 posts
23 upvotes
cba123 wrote: Are you sure it was the foundation that sank vs the garage floor has heaved upwards?

Foundations are usually set deep below frost line, and shouldn't heave up or down. On the hand, the garage floor is normally just poured over top of a gravel base and can heave up and down in the winter. The garage floor is not normally tied into the foundation, and is poured separately after the foundations are poured.
Hi CBA123,
you could be right, I'm not sure. Its just that one corner that is affected from what I can tell.
Sr. Member
Mar 10, 2004
793 posts
292 upvotes
Bottomlesspit wrote: Hi CBA123,
you could be right, I'm not sure. Its just that one corner that is affected from what I can tell.
Outdoor pic shows wall sunk a little which is consistent with inside pic. I d probably just take measurements and make sure gaps aren t growing or wall cracks. Definitely have the downspout moved further away from wall and make sure slope down and away from walls.
Deal Guru
Jan 25, 2007
11603 posts
6774 upvotes
Paris
Friends of ours had a hole so deep in the centre of their garage lady of the house could stand in it and her head was level with the proper floor height. Was a hell of a mess to fix.
Deal Addict
May 24, 2004
2288 posts
494 upvotes
That sounds like a sinkhole.

OP, perhaps look into a company that does mud jacking. What they'll do it is drill a series of hole and pump mud underneath to raise the garage floor back to level. Once they're done, they clean out the hole and fill it with cement.
Sr. Member
Oct 4, 2010
802 posts
429 upvotes
Surrey
Foundation company may install push piers under the affected spots of the foundation to raise it back up . Think of it like a permeant car jack

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