2024-10-182 min read
Bathroom Waterproofing — Why It Is Mandatory & Cost
Waterproofing is the most important step in bathroom renovation. Why many skip it and regret later.
This is the most expensive mistake homeowners make: skipping waterproofing during bathroom renovation. "Save RM300-400" but leak repairs can cost RM3,000-5,000.
What Is Waterproofing?
Waterproofing is a waterproof layer painted on bathroom floor and walls BEFORE tiles are installed. It prevents water from seeping down and damaging the structure.
Why Is It MANDATORY?
- Prevent leaks downstairs — seeping water can damage ceiling below
- Prevent mold — moisture in walls = continuous mold growth
- Prevent structural damage — seeping water can damage rebar and concrete
- Tiles will not lift — moisture under tiles can cause them to lift
Types Of Waterproofing
Liquid Membrane (Most Popular)
- Painted on surface, 2-3 layers
- Cost: RM3-5/sqft
- Suitable for all bathrooms
Sheet Membrane
- Special plastic sheets
- More expensive but more reliable
- Suitable for large bathrooms
Waterproofing Cost
| Bathroom Size | Estimated Cost |
|---|---|
| Small (25-35 sqft) | RM150-250 |
| Standard (35-50 sqft) | RM200-400 |
| Large (50-80 sqft) | RM400-600 |
Signs Of Failed Waterproofing
- Ceiling below bathroom has water marks
- Wall paint bubbling or peeling
- Continuous damp smell
- Bathroom floor tiles lifting
Bathroom leaking? Or want to renovate with proper waterproofing? WhatsApp TilesPro now.
Want a price for your area? See where TilesPro works across all 16 states or check our tiling services and starting prices.