Substrates, tanking and tiling
Wet areas need a substrate that tolerates moisture: tile backer board or fully tanked, primed plasterboard with a liquid membrane taken into corners and around pipe penetrations. This is the single biggest determinant of whether a shower area lasts fifteen years or three.
Large-format porcelain needs a flat, rigid base and full adhesive coverage; on timber floors that usually means additional decking or a decoupling layer to prevent movement cracking the grout. Natural stone brings sealing requirements of its own.
Grout and silicone selection matters for hard-water areas like Buckinghamshire: flexible movement joints where planes meet, and a mould-resistant sanitary silicone in the wet zone rather than standard grout carried into the corner.







