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Easygoing

09:37AM | 09/05/05
Member Since: 09/04/05
1 lifetime posts
Bvbasement
Could someone please help me with the following problem I've encountered with my home.

Bought this home 5 years ago. Basically built on a foundation which is built on a sand hill.

There is a crawl space beneath the home with about 3 feet of clearance. The previous owners had excavated a section about 8 feet wide and 12 feet long and another 3 feet deeper. So there is about 6 feet clearance between home and floor. This section was built out of basement grade plywood, with a floating wood floor. The wood pieces could be no more than 2 feet by 8 feet because of the size of the hole to get down to this area. This was built to house the hot water tank and the water pump sits above the wall. There also is a sump hole which has 2 short pieces of weeping tile leading into basically a deeper hole that a plastic garbage can fits into. The problem is that the past 2 years have been extremely wet and the one wall(inside wall) pushed in. This is due to the fact everything is sand and the water did not seep through the weeping tile as fast as it was coming in. Now I'm faced with the problem of trying to redo this wall. Also the other wall(outside wall) which is basically only a foot from the house foundation is pushing in. I'm worried that if I start messing with the sand something worse may happen. Does anyone have suggestions on how to fix these walls and not causing more problems. I've never worked on a foundation before and have no idea how to work with sand. Any suggestions would be greatly appreciated.

By the way the house is 1000 sq feet.

Thanks in advance.

Glenn Good

03:19PM | 09/10/05
Member Since: 09/10/03
320 lifetime posts
It sounds like you may have a serious problem along the outside wall. The pit dug under the house may be too close to the exterior foundation. This could have serious implications for the structural integrity of the footing.

There are several possible solutions to the problem but due to the possible severity of the problem and liability issues I strongly suggest you have a professional structural engineer look at it. He/she can give you the best solution to the problem.

Glenn

Moderator: Construction Systems, Foundations, and Masonry & Stone

For more information about me and/or my qualifications please visit my website at:

www.consultationdirect.com

chorlton

06:53AM | 09/12/05
Member Since: 08/29/04
35 lifetime posts
I agree with Glenn. Sand can be very problematic and can even liquefy in certain circumstances. Digging the pit has undermined your foundation. The loadbearing stratum has been destabilised, and I would suggest you seek professional advice. He will probably recommend filling in or shoring up the hole, and some kind of remedial action on the wall.
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