Raise or Lower a large bump in the middle of my concrete basement floor

3/30/2020 at 12:18:51 AM

If you want we cAn come and check and also we can do

We will tell you once we'll take a look

3/30/2020 at 2:43:49 AM

Hello Jeremy,

A few things I would like to know as repairing the crack\heave is not going to help unless the reason for this happening is diagnosed and repaired. Most likely exspansive soil (clay). Water is most likely has been breaching the sub surface and swelling the soil under the concrete and creating swell pressure.Replacement of eaves, downspouts location, sloping of soil at grade against exterior walls would be best case. Depending how long this has been happening . 3" heave is very serious.Plugged weeping tile dependinng on age of home. The system may need be replaced or added. Interior weeping tile with a sump pump could be needed .Possible a exterior wall sinking causing a heaving crack which could be piles installed and jacking the exterior walll.As for repairing crack grinding, cutting high side out with stitching concrete with metal ties and securing it from pulling apart is the way to go. There is a risk of radon gas passing into the home. Need to fix whats causing the heave.The cost is hard to say untill a proper evaluation is done. Please feel free to contact me. Please send me pictures or if you would like a free quote please text or call. Thanks

Paul H.

Edmonton Exteriors

587.590.7499

3/30/2020 at 8:00:12 AM

Hi Jermey. 3.5 inches is quite a bit to raise up. I would grind it even. But 3.5 inches is also a a lpt. Do you know how thick the slab is? You may have to cut out a section and repour it.

3/30/2020 at 8:48:46 AM

Either would work. you may have to do a bit of both to get the best possible outcome.. Keep in mind all you are doing is putting a band aid on it. The main reason your floor is heaving is because your weeping tile aren't working right.(may be plugged or collapsed). doing the band aid it may only last a year or 2, or it can last 10 years. Not a chance I would take.

I would recommend removing the floor altogether leaving approx 6" around the perimeter. Installing a pit and pump, with new weeping tile. and pour a new floor. This will cost more than patching but it is the correct way.

(I quoted a job similar to this and if i remember correctly it was approx $13000 that's for patching, for a few thousand more he could of got a new floor.)

4/22/2020 at 11:23:35 AM

hello, it would be very difficult to grind down 3.5" and to add to the surrounding area to bring it up will obviously raise your whole floor giving you less height. only concern with either way is if what is causing the bump occurs again it will all be a waste of both time and money. ideally the best solution would be to remove the 13x9 area and pour new concrete to match around with drilling in dowels to surrounding so lifting does not occur. cost is approx. $3000-$4000.

Thanks,

John