01:58PM | 02/22/05
Member Since: 02/21/05
1 lifetime posts
hello, i have a question about my basement floor. a couple years ago we had a large rainfall and my walkout basement cement is cracking and heaving during the winter months. the cracks a about 1/4 inch wide and heaving approx 1/4 to 1/2 inch they have spread from end to end of my basement. since the rainfall and after noticing water puddles out my walkout basement i have put a line of weeping tile underground from the house to to coulee 50 ft away. this year i have noticed that the cracks have gradually gotten larger... i am wanting to ceramic tile the floor but with the cracks and heaving am afraid to do so. it is an unusual instance as there is not one crack in any walls inside or outside of my house and the structure of the house seems to be fine. the cracks seem to be appearing about 3-5 feet from the foundation and are heaving as if the concrete floor is lifting from the center on the house as there is no cracking near the main steel poles above the main beam. i have put a ruler over a crack and it teeters about a 1/4 inch starting from the the first crack line 8 ft from the wall then move to 5 ft away and again 1/4 inch or so as if the foundation is dropping. again it is hard to understand as the drywall at the base of cement is the same as when it was first put up and the poles are not droppin. no moisture appears in the basement except little discoloration spots near the cracks about 2 inches and only 4 or 5 spots. last with a plate tamperer on the outside of the walkout i tried packing the ground for paving stone and the ground feels like a plate on water (almost hollow) i do not know what to do could you please help!!! thanks.


08:23PM | 02/26/05
Member Since: 11/27/04
172 lifetime posts
this can happen in clay soils that freeze hard in the winter. the soil will actually lift the foundation up and then in the spring it will lower back down. and the floor (depending on friction) will react differently. this also depends on how much saturation there is in the soil.

some fixes are to get 2" exterior styrofoam and place around the foundation a foot underground to prevent the freeze from going underneath the foam, resulting in no lift. but 2 feet out may not be enough as the ice goes down on about a 35 to 45 degree angle when it passes the styrofoam.

other is to dig up 2 feet out from the foundation to the bottom and (waterproof) fill with good draining fill to keep ice away from the foundation.


01:44PM | 03/04/05
Member Since: 03/03/05
273 lifetime posts
There is a great product named SunFlex that is a liquid rubber with a 500% elongation. It can be decorative as in quartz broadcasting, flake or rubber granules. This is the same product used in waterparks and zoos across the country. It is not a DIY prodcut, but it works and has a proven track record to prove it. Email me with any questions. [email protected]
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