Tiling

Bathroom waterproofing and tanking: when required, liquid vs sheet membrane systems, wet room construction, common failures

Essential tiling tools: notched trowel selection by tile size, wet saw vs score-and-snap, levelling clip systems, grout float types

External tiling: R11 minimum slip resistance, frost-proof tiles, S2 flexible adhesive, movement joints at 3m max, drainage falls

Floor-to-wall movement joints: silicone in all internal angles (no grout), Schlüter Dilex profile range, 3m internal movement joint frequency, BS 5385-1/3 requirements, expansion at heated screed perimeter

Grout repair and regrouting: oscillating multi-tool with grout rake attachment, minimum 20mm rake depth, RCS dust hazard (COSHH), colour matching new vs existing, BS 8000-11 workmanship standard

Centre-line setting out, half-tile avoidance at slivers, movement joints at internal corners (silicone not grout), BS 5385-3 joint spacing (4.5m floor, 3m walls)

Large format tiles (600mm+): back-buttering, notched trowel size (12mm for 600x600), levelling clip systems, BS 5385 substrate flatness

Mosaic tile installation: mesh vs paper-faced sheets, white adhesive for glass, unsanded grout for 2mm joints, epoxy grout option

Natural stone tiling: porosity testing, impregnating sealer before grouting, white cement adhesive for light stone, movement joints

Pool and spa tiling: vitrified porcelain ≤0.5% water absorption (EN ISO 10545-3), epoxy grout mandatory, C2TE S2 flexible adhesive, white cement for light tiles, pool empty 28 days before grouting — NEEDS FIX

Tiling over UFH: flexible S1/S2 adhesive, decoupling mat over screed, 6mm movement joints, heating commissioning before tiling

Floor/air/dual sensor types, Part L requirements, IP ratings for bathroom zones, RCD protection, BS 7671 Section 753, 16A load switching, dimmer incompatibility