Waterproofing Cape Town

It depends on the system and the exposure. Torch-on bitumen on a flat concrete roof lasts 15-20 years from an approved applicator. Liquid polyurethane systems run 15-25 years. Atlantic Seaboard properties — Sea Point, Camps Bay, Strand — knock 20-30% off those ranges because salt-laden onshore wind eats every membrane faster than the inland metro. Every job we do carries a 10-year workmanship guarantee on top of the manufacturer warranty.

Late summer through early autumn — February to early May — before the first north-wester lands. Cape Town's heaviest rainfall runs May through August. Once the wet weather is in, torch-on bitumen needs a dry primed substrate to bond, so jobs queue for 24-48 hour dry windows that shift several times. Booking the inspection in February and the work in March or April is the only reliable way to be sealed before the storms.

Indicative 2026 metro pricing: torch-on bitumen R220-R380/m², liquid acrylic R150-R260/m², liquid polyurethane R350-R550/m², full polyurethane systems with UV topcoat R450-R750/m². Sea Point, Camps Bay and Strand seafront jobs typically carry a 10-15% salt-exposure uplift. We give you a fixed written quote after the free on-site inspection — not a per-square-metre number over the phone.

No — those areas are covered by our sister site waterproofingdurbanville.co.za with a separate team based in the Northern Suburbs. We focus on the rest of the Cape Town metro: Southern Suburbs, Atlantic Seaboard, City Bowl, Cape Flats, Far South Peninsula and Helderberg. If you're in the Northern Suburbs, head over to the Durbanville site and you'll get the same waterproofing standards from the team that knows your suburbs.

Three visual clues. Rising damp draws a roughly horizontal tide-mark between 800mm and 1.2m up the wall, with salt blooms and paint blistering below it. Penetrating damp ignores any horizontal line — it shows as irregular wet patches on whichever facade the weather hits, typically west or north-west walls. Lateral damp is single-wall and arrives where soil is banked against the inside face — common in Gordon’s Bay and Strand split-levels, also in Constantia properties built into a slope. A 20-minute moisture-meter pass settles it before we quote.

Yes — every completed job receives a printed workmanship guarantee certificate listing the scope of work, the system installed, the manufacturer product warranty terms, and the workmanship cover period (typically 5 to 10 years depending on the system). It is transferable to the next owner on resale. If the work fails inside the guarantee period where we sealed it, we come back at no charge — and we have done, more than once.

Yes. During active storm fronts we run two response vehicles between the Atlantic Seaboard, the Southern Suburbs, the CBD and the Cape Flats. Most active-leak jobs are reached within 4 hours in business hours and same-day in the evening; on the worst back-to-back front days we may queue you for first thing the next morning with a tarp dropped off in the meantime. Call us as early as you can — the diary fills first thing on storm mornings.

Index and Derbigum torch-on SBS bitumen membranes for flat concrete roofs and balcony decks. Sikalastic liquid polyurethane systems for complex geometries and parapet detailing. Plascon Roof Care acrylic coatings for tile and IBR sheeting. Drizoro Maxseal cementitious tanking for basements and below-grade walls. Xypex and Penetron crystalline integral systems for concrete that needs to become waterproof in itself. The system we recommend depends on the substrate, the exposure category and what the existing layer is — never on what is cheapest on the shelf.