The bathroom is the most water-exposed room in your home. Without proper waterproofing, water seeps through floors and walls, causing damage to the structure below — sometimes affecting your neighbor's ceiling in condos and apartments.
When to Waterproof Your Bathroom
During renovation — the ideal time, as floors are exposed
When you notice dampness on the floor outside the bathroom
If the ceiling below shows water stains — the bathroom above is leaking
New construction — always waterproof before tiling
Bathroom Waterproofing Methods
1. Cementitious Waterproofing (Most Common)
Products: SikaTop Seal 107, Mapelastic Smart
Applied on cement screed before tiling
2–3 coats with fiberglass mesh reinforcement
Cost: RM1,200–2,500
2. Liquid Membrane
Products: Sika Liquid Plastic, Fosroc Nitoproof
Flexible rubber-like coating
Bridges hairline cracks
Cost: RM1,500–3,000
3. Injection Grouting (No-Hack Method)
Injects waterproofing compound through existing tiles
No need to remove tiles
Cost: RM800–2,000
Critical Areas to Waterproof
1. Floor — entire bathroom floor, minimum 150mm up the walls
2. Shower area — walls up to 1,800mm (full shower height)
3. Around toilet — extend 300mm in all directions
4. Pipe penetrations — all points where pipes enter floor/wall
5. Floor drain — seal around the drain collar
Common Bathroom Waterproofing Mistakes
Not letting waterproofing cure before tiling
Only waterproofing the shower area (not entire floor)
Using cheap materials that crack after 1–2 years
Not waterproofing up the walls high enough
Skipping the fiberglass mesh reinforcement
For a professional bathroom waterproofing that lasts 5+ years, contact AquaShield.
