Please refer to your local builder for full advice on a suitable foundation type, however see guidelines below. Typically a foundation type is decided upon by relevant information such as soil conditions, frost heave, proximity to surrounding vegetation, landscape contour (slope of site), fresh landfill, clay, sandstone, loamy soil, water table and structural load. Theses are all relevant issues that may affect the foundation type (strip, trench, raft or pad foundation). Excavation depth and width, concrete thickness and proximity of concrete to finished ground level is also very important in selecting the correct foundation type for your site to save costs within the ground.