Sand will not change as moisture conditions change. If you think that it might be too much a problem … Related slab on grade foundation … Now that house is built, I have those numbers. Among these factors, types of soil play significant role, that why this article discuss the selection of foundation … I never thought, unless the rock was an expansive shale or schist that any would think there is that much a problem for a residential home. This is a particular problem for concrete foundations and basements when water seeps in from the surrounding ground. The house turned out to be 40' downhill and 32' wide with a 24x24 garage. Slab on Grade foundation, detail design; the basics. Pyrite is a common mineral in shale, coalbeds, and … With enough labor on the construction site, builders could form and pour a new foundation in just two or more days. Rock can erode and expand slightly only if it is a low density of shale. Rock. Our soils here in southern Saskatchewan (9000 HDD) are quite variable when it comes to clay content, but almost all of the homes in the local area (regular concrete basements on wide footers) eventually end up having some problems with foundation … Commonly, the selection of foundation type for a given structure is controlled by number of factors for example soil type, past site usage, adjacent construction, size of development process, limitations. There are many different soil conditions and corresponding slab designs. Foundation Damage Due to Composition or Inclusions Foundation Cracks, Spalling, Stains caused by composition, inclusions, steel, rust. This page is about how to build a thickened edge concrete slab on grade FPSF footing on soil with a high water table to prevent frost heave, by first installing drainage below the slab. Hello everyone, I just want some advice, is there anyone who has come across Red Shale used as foundations to a building. The only thing that limited the final shape of the foundation was the design of the wood forms that held the wet, plastic concrete that was placed in them. My home has been built on Red Shale, which has not really caused any structural problems, although a lot of my neighbours have had to dig their floors out to remove the shale… When thinking of the preferred type of filling in dirt around foundation structures, the objective is ensuring water drainage, away from your house foundation, is fast and as easy as … Defects in concrete mix (too much water, for example), or defects … Pyrite in underlying rocks. I am planning to build a super insulated home in the next year or so and would like to avoid using a basement. 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