Foundations Build Types

Foundations are determined by ground conditions. Under raft foundations a reinforced concrete raft is designed by an engineer to “float’ over bad or differentially settling ground. Deep strip type foundation has a minimum 225mm of concrete, sometimes with reinforcement, at the bottom of the trench if the inspector considers it to be necessary.

Trenchfill foundations are similar but for the fact that the concrete is brought to within 200mm of the ground level. The inspectors decide whether this can be with or without reinforcement and sometimes with compressible material or slip membranes down the trench sides.

On other had, piled foundations use steel or concrete piles driven, bored or dug to find a good bearing. These then support a ground beam spanning from pile to pile upon which your home is constructed.

A self builder can choose foundations build types as per the requirements. Timber frame and brick and block are the two main forms of house construction in the UK. The main difference between the two types of construction is how the loads of the house are taken.

With timber frame, the frame itself supports the weight of the house, while with brick and block, both the outer brick and the inner block take the weight. Both have their advantages and disadvantages, so the method you go for will depend on your own personal preferences.

Keep in mind that many local authorities refuse to issue a completion certificate until such time as a proper driveway is in. They may also insist on pathways, including disabled access, and bin stores being completed. Also, “Approved Contractors’ can only carry out work to or within the Highway. A list of these is obtainable from the local or Highways authority.