Foundation

Foundation details split into trench and strip foundations and raft foundations. Between them they cover masonry cavity walls (including 150mm cavities and partial fill), timber frame, steel frame, CLT, SIPS, ICF, stone-faced walls and EWI, with ground bearing, beam and block and suspended timber floors, plus insulated foundation systems and Passivhaus raft foundations.

What’s the difference between trench fill and strip foundations? A strip foundation is a concrete strip with masonry built up from it to ground level. A trench fill foundation fills the trench with concrete almost to ground level, reducing the masonry needed below ground.

Who confirms foundation design? Foundation size and depth depend on ground conditions and loads. Treat these details as a starting point and confirm the design with a structural engineer and building control.