Qualispray Services
Waterproofing Cape Town: Roof, Flat Roof & Torch-On Specialists
Trusted & Affordable
Waterproofing Cape Town: Stop Leaks Before the Damage Spreads
Cape Town winters find every weak point in a building. A small leak quickly becomes damp walls, lifting paint, mould and structural damage, and repainting over it solves nothing until the waterproofing is fixed.
Qualispray identifies the source of water ingress and applies the right system for the substrate: torch-on membranes for flat roofs, liquid-applied membranes for detail areas, and full parapet, balcony and box-gutter treatments, all finished properly with protective coatings.
Most leaks we’re called out for aren’t in the middle of a flat roof, they’re at the junctions: parapet walls, box gutters, chimney flashings and where a flat roof meets a wall. These detail areas fail years before the main membrane does, which is why a proper waterproofing job treats every junction individually rather than just rolling a coating over the flat sections.
Winter is the worst time to discover a leak and the best time to have prevented one. If your roof, balcony or parapet hasn’t been inspected in the last two to three years, small failures are very likely already forming, even if there’s no visible damp yet inside.
Want more detail? Read our complete waterproofing guide, our waterproofing cost guide, or our advice on damp proofing.
What's included
- Flat roof torch-on waterproofing
- Balconies, parapets & box gutters
- Liquid-applied membrane systems
- Roof screw, flashing & joint sealing
- Damp diagnosis & source tracing
- Protective top coats & maintenance
Waterproofing Services
Waterproofing Solutions for Cape Town Properties
Roof Waterproofing
Pitched and flat roofs both leak at their weak points. We waterproof flashings, valleys, roof screws, laps and roof penetrations, and apply membrane and coating systems that keep winter rain out for years. Roof waterproofing is often combined with roof repairs and roof painting in a single project.
Flat Roof Waterproofing
Concrete flat roofs are where torch-on membranes are used most. We prepare the existing surface, prime, torch on the membrane with properly sealed laps and upstands, and finish with a reflective protective coating. Existing membranes that are still sound can often be repaired and recoated instead of replaced.
Balconies, Parapets and Box Gutters
Water pooling on balconies and in box gutters, and cracks along parapet walls, cause many of the leaks we are called out for. We treat these details with liquid-applied membranes and reinforcing fabric so they move with the building without cracking.
Walls and Damp Proofing
Rising and penetrating damp ruin paint and plaster. We diagnose the cause, treat and seal affected walls and apply waterproof coatings to exposed walls. Read more in our damp proofing guide.
Systems and Costs
Choosing the Right Waterproofing System
No single waterproofing product suits every job. We match the system to the substrate and the problem:
- Torch-on membranes: bitumen membranes heat bonded to concrete flat roofs, the standard choice for larger flat areas. Read torch-on waterproofing explained.
- Liquid-applied membranes: brushed or sprayed on with reinforcing fabric, ideal for balconies, parapets and detail areas.
- Protective and reflective coatings: applied over membranes to shield them from UV and extend their life.
- Sealants and flashings: for metal roof screws, laps, chimneys and wall junctions.
Waterproofing cost in Cape Town depends on the area, the condition of any existing membrane and how many detail areas need treatment. Our waterproofing cost guide explains the main price factors, and we give a free, itemised quote after inspecting the property.
When to Call a Waterproofing Contractor
- Damp patches or stains after rain
- Bubbling or peeling paint on walls
- Water pooling on a flat roof or balcony
- Cracked or lifting torch-on membrane
- Mould or musty smells indoors
- No roof inspection in two to three years
Why Qualispray
Why Choose Qualispray for Waterproofing
Find the Real Source
Water travels. We trace leaks to their actual entry point instead of patching where the stain appears, so the fix holds.
The Right System
Torch-on, acrylic or polyurethane: the correct membrane for each substrate and detail, applied to specification.
Built for Cape Winters
Systems specified for wind-driven Cape rain and UV exposure, finished with protective coatings for a longer service life.
How It Works
Our Simple 4-Step Process
01
Free Assessment
02
Detailed Quote
03
Expert Workmanship
04
Final Inspection
Areas We Serve
Serving Cape Town & the Western Cape
Northern Suburbs
- Brackenfell
- Bellville
- Durbanville
- Kraaifontein
- Kuils River
- Parow & Goodwood
Blaauwberg & West Coast
- Table View
- Blouberg
- Milnerton
- Parklands
- Melkbosstrand
- Century City
Southern Suburbs & City
- Claremont
- Rondebosch
- Constantia
- Wynberg
- City Bowl
- Atlantic Seaboard
Helderberg & Winelands
- Somerset West
- Strand
- Gordon's Bay
- Stellenbosch
- Paarl
- Wellington
FAQ
Frequently Asked Questions
Waterproofing cost depends on the size of the area, the system used and the amount of preparation and detail work needed. Our waterproofing cost guide covers the main factors, or book a free inspection for an itemised quote.
Damp ceilings, water stains, bubbling paint, mould or musty smells after rain are the usual signs. We inspect and trace the source free of charge before quoting.
A bitumen membrane heat-fused to the roof surface. It is the industry standard for flat concrete roofs, balconies and box gutters, offering a tough, seamless waterproof layer.
A correctly installed torch-on system typically gives many years of service, especially when finished with a UV-protective coating and inspected periodically.
Yes, that’s the right order. We waterproof first, allow proper curing, then repaint. As painting contractors too, we handle both under one quote.
Yes. Flat roof waterproofing is one of our core services, using torch-on membranes and liquid-applied systems finished with protective coatings.
Leak repairs and urgent waterproofing can be done between rain spells. Larger torch-on and coating jobs are best done in dry weather, so booking before winter is ideal.
Yes. We often combine waterproofing with roof repairs and roof painting in one project, which saves time and cost.