5 Costly Mistakes When Renovating a Bathroom

The bathroom is a small space where mistakes are felt the most — literally, through damp and leaks, and visually, through uneven tiles or a poorly planned layout. Here are five mistakes that keep repeating.

The first is skipping waterproofing to save time or money. Without proper waterproofing, even the smallest leak seeps through the floor or wall over time, and it's usually only discovered once the damage has already spread to neighbouring rooms.

The second mistake is poor layout planning before work begins — for example, positioning a shower cabin where the drain isn't naturally sloped, which later causes slow drainage. The third is choosing a cheaper tap or trap that fails quickly, meaning the repair has to be done through finished tiles.

The fourth mistake is insufficient ventilation, which causes damp grout lines and mould even with quality tiling. The fifth is putting off small repairs like a dripping tap, which damages surrounding materials over time. All these mistakes share one thing in common — they're cheaper to prevent at the planning stage than to fix once the bathroom is finished.