Precast concrete units are increasingly used as a form of basement construction and provide an excellent support for waterproof membranes, either as a tanked membrane system or as the outer wall of a drained cavity or even as proprietary Type B system. Precast sections can be fabricated to specific design requirements for just-in-time delivery, providing rapid on-site construction, integrated water bars, low site waste and high quality finishes. They are particularly appropriate for developments potentially benefitting from a high number of repeated standardised elements and the use of a crane on-site. The waterproofing detail should be designed to suit the manufacturer’s established method of joining panels.
Precast concrete being installed