CONCRETE RAFT BASE
Why a Concrete Base?
A raft foundation spreads the weight of the building over the whole ground floor area of that building. The raft is laid on a hard-core, or scalping bed and usually thickened at the edges, especially in very poor ground. Rafts are most suitable when the ground is of good load bearing capacity and it is required to get a solid foundation.
Some Companies use a plastic base and although they are cheaper, we know concrete will last. Raft Foundations are built as these following steps: The soil removed down to correct depth approx. 400mm The foundation bed is then compacted than 100mm of concrete is laid A DPM membrane is laid also 100mm of insulation then a 70mm screed finish.