Pouring of floor slabs 10 Home And Garden Design Ideas
The concrete floor slab must be 75 mm thick (one-brick course thick) and should consist of 10 MPa concrete, mixed from one part cement, four parts sand and five parts 20 mm aggregate.
In areas where groundwater is a problem, it is advisable to place a suitable plastic waterproofing membrane of 0.25 mm on the filling prior to pouring the concrete. This membrane must be folded upwards to the thickness of the slab around the perimeter. An overlap in the membrane must be at least 150 mm It is advisable at this point to consult with your plumber and electrician to ascertain whether any services such as electricity conduit or drainage pipes should be placed in position before concrete is cast. This will save time and cost by eliminating chiselling and breaking out parts of the concrete slab at a later stage.
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On completion of the floor slabs, the walls of the house must be bricked up to roof height, securing all door- and window frames in place in the process.
Always place door- and window frames on an exact vertical plane, and make sure you provide horizontal support for doorframes to prevent them from bending inwards from the pressure of the surrounding walls. Once again, this will be the last opportunity to make minor alterations. For instance, you cannot request a new load-bearing wall if a proper foundation has not been provided for it.
Before laying the first brick, a damp-proof course (DPC) should be provided in the form of a continuous waterproof layer the width of the brick wall. DPC is placed beneath ALL walls to prevent damp from the earth from rising into the walls.
It is good building practice to brick up the walls of the entire building simultaneously.