This room demonstrates how simply a bathroom set down can be achieved in lightweight timber construction, with all designed set-downs fabricated into the floor cassettes and delivered to site pre-made. Here we show a traditional cement sand screed system with a liquid waterproofing membrane, and two options for service risers. The white riser to your right-hand side is constructed out of Promat’s L-500 board - a self-supporting fire rated board which requires no framing support – and features a few typical service penetrations treated to test standards with Promat fire collars.

On the left-hand side of the room you can see an alternative to this shaft which has been laminated out of three layers of fire rated plasterboard, a solution detailed in most published plaster guides.

When you’re ready, pop over to the adjacent room for the next station on this tour.