- *Water-retaining structures* – potable water tanks, reservoirs, canals, culverts. Also approved for potable water contact
- *Water-excluding structures* – basements and below-ground retaining walls/foundations, including construction joints as part of a BS 8102 waterproofing system.
- *Swimming pools and water features*.
- *Wet areas* – bathrooms, kitchens, shower rooms
- *Roof decks, balconies and terraces*.
- *Drainage structures, tunnels, culverts and bridge decks*.