Waterproofing is the most re-done trade in home maintenance, because a good job and a bad one look identical the day the contractor leaves.
The difference shows in the first real Cape winter. Leak tracing sits under Leak Detection Cape Town.
Send the area in square metres and photos of the surface as it is now.
Get a Waterproofing QuoteWhat a Lasting Job Includes
- Tracing the actual entry point first, rather than coating the visible area.
- Stripping failed coatings back to a sound substrate.
- Correcting falls so water drains instead of ponding.
- Detailing upstands, outlets and penetrations, which is where systems fail.
- Applying the specified number of coats at the specified thickness.
Cheap quotes skip steps two and three, and those are the two that determine whether the work lasts ten years or one.
Systems
| System | Best for |
|---|---|
| Torch-on bitumen membrane | Flat and low-slope roofs. Durable, needs skilled detailing. |
| Liquid-applied acrylic | Complex shapes with many penetrations. Seamless, shorter life. |
| Polyurethane | Balconies and trafficked decks. Flexible and tough. |
| Cementitious slurry | Wet areas, showers, water tanks and retaining structures. |
Waterproofing Prices in Cape Town
| Job | Indicative range | What moves it |
|---|---|---|
| Roof waterproofing, general range | R150 – R350 per m² | System and preparation dependent. |
| Torch-on membrane | R300 – R400 per m² | Flat and low-slope roofs. |
| Liquid-applied acrylic | R140 – R400 per m² | Complex roofs and detailing. |
| Surface preparation | R20 – R100 per m² | Cleaning, crack filling, rust treatment. |
| Flat roof, 40 m² in torch-on | R12,000 – R24,000 | A typical sectional job. |
| Flat roof on a 100 m² home | R18,000 – R35,000 | Installed. |
| Bathroom or shower waterproofing | R4,500 – R12,000 | Per wet area. |
| Basement waterproofing | R400 – R1,500 per m² | Tanking and negative-side systems. |
| Small patch repair | R2,000 – R6,000 | Localised failure. |
These are indicative market ranges, not a quotation. They are compiled from published South African leak detection and plumbing pricing to give you a starting point for budgeting. They are not the rate card of any company on this platform.
Compare quotes on system, number of coats, preparation included and guarantee length. A rate per square metre means nothing until you know what the rate covers.
Related Services
Frequently Asked Questions
How much does waterproofing cost per square metre?
Roof work generally runs R150 to R350 per m², with torch-on around R300 to R400. Preparation adds R20 to R100 per m² depending on what has to be stripped and repaired first.
How long should waterproofing last?
A properly installed torch-on system should run 10 to 15 years, acrylic coatings rather less. Guarantees vary widely, so ask for the term in writing and what it excludes.
Can waterproofing be applied over the old coating?
Only if the existing layer is sound and compatible. Coating over a failed or delaminating membrane traps moisture underneath and the new work fails early, which is the most common reason waterproofing gets done twice.
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