Badezimmer-Renovierung Inspektion

Wet areas require tanking (waterproof membrane) system applied to walls and floor. EN 14891 compliant waterproofing required. Minimum 200mm membrane height above splash zones.

- Standard plasterboard in wet zones instead of tanking board

- Tanking membrane not lapped correctly at joints

- Insufficient membrane height (should be full height in shower zone)

- Shower tray not properly bedded — flexes and cracks seals

- Missing tanking at pipe penetrations

- Grout used instead of silicone at movement joints

All sanitary ware must be securely fixed, leak-free, with accessible isolation valves. WC must be firmly mounted. Mixer taps should have hot on the left.

- WC not properly fixed to floor (movement causes seal failure)

- Slow drain from improper fall or partial blockage

- Tap handles reversed

- Missing isolation valves

- Sealant gaps around sanitary ware

- Low pressure from kinked flexible connections

Bathroom electrical zones (0-2) dictate what equipment is permitted. RCD protection (30mA) required for all circuits. IP-rated fixtures required in wet zones.

- Sockets in wrong bathroom zones

- Missing RCD protection

- Extractor fan ducted into roof space instead of outside

- Light fixtures without proper IP rating in wet zones

- Standard light switches inside bathroom (should be pull-cord or outside)

- No separate extractor fan switch

Tiles must be firmly bonded with consistent joint widths. No lippage exceeding 1mm for rectified tiles. Joints must be fully filled. Silicone at movement joints.

- Hollow tiles from insufficient adhesive coverage

- Grout at movement joints instead of silicone

- Excessive lippage

- Inconsistent joint widths

- Chipped cuts

- Missing grout in joints

Bathroom ventilation required — minimum 15 l/s (54 m³/h) continuous or intermittent extraction. Must exhaust to exterior, not into roof space.

- Extractor vented into roof space

- Duct disconnected at joints

- Fan undersized for room

- No extractor installed

- Duct not insulated — condensation

- Blocked grille