Waterproofing Cape Town

Waterproofing Cape Town covers roofs, walls, balconies, wet areas and below-ground structures. The work is straightforward to specify and easy to get wrong, because a good job and a bad one look identical the day the contractor packs up.

The difference shows in the first serious winter front. This page covers the systems, what they cost, and links through to the specific service you need.

Waterproofing Services Across Cape Town

Roofs

Roof waterproofing is the largest share of the work. Flat roofs need falls and outlets sorted before any membrane goes down, concrete slabs need crack and joint detailing, and metal and IBR sheeting fails at fasteners and overlaps rather than across the sheet. Torch-on membrane is the system most of these end up in.

Repairs

Roof repairs deal with physical damage: cracked tiles, lifted ridges, failed flashings and storm damage. Roof leak repairs start with tracing where water is actually getting in. Gutters and downpipes cause more wall damp than most people expect, and roof painting protects the surface once the substrate is sound.

Walls and Damp

Damp proofing covers moisture already inside a structure. Rising damp is a specific case, moving up through masonry from below. Wall waterproofing stops driven rain getting through porous brickwork and cracked plaster in the first place.

Wet Areas and Below Ground

Balconies and bathrooms leak under their finishes, so the membrane sits beneath the tiles. Basements deal with water under pressure from outside, which is a different engineering problem entirely.

Contractors and Larger Projects

If you are at the stage of choosing who does the work, waterproofing contractors covers inspections, quotes and what to compare. Commercial waterproofing covers offices, retail, warehouses and body corporate projects. Each of these has its own page, linked from the service cards below.

Waterproofing Systems

Waterproofing Cape Town Price Guide

Published market ranges for waterproofing work in South Africa, to give you a sense of where a job is likely to land before anyone visits:

What a Lasting Job Includes

1. Tracing the actual entry point rather than coating the visible stain.
2. Stripping failed coatings back to a sound substrate.
3. Correcting falls so water drains instead of ponding.
4. Detailing upstands, outlets and penetrations, which is where systems fail.
5. Applying the specified number of coats at the specified thickness.

Cheap quotes skip steps two and three. Those two decide whether the work lasts a decade or a season.

Cape Town Conditions

Three things drive most of the failures seen locally.

• Winter rainfall. Rain arrives in concentrated fronts rather than spread through the year, so a marginal roof is fine for months and then fails repeatedly over a few weeks.
• Wind-driven rain. Water is pushed sideways and upwards into laps, under flashings and through wall cracks that would never leak under vertical rain. Detailing matters more here than the coating itself.
• Coastal exposure and UV. Salt air corrodes fasteners and sheeting, and strong summer UV degrades exposed membranes and coatings faster than inland.

Older Southern Suburbs and City Bowl housing stock adds solid walls without a damp-proof course, and much of the flat-roofed stock in Sea Point, Green Point and the CBD is concrete that has been recoated several times over.

What to Check Before Appointing Anyone

• Which system is specified, and how many coats or layers?
• Is surface preparation priced in, or added once they are on the roof?
• Are upstands, outlets, parapets and penetrations included in the rate?
• Is the existing coating being stripped, or coated over?
• What is the guarantee term, and what does it exclude?
• Is scaffolding or access equipment included?
• Is making good, tiling or reinstatement in the price?

Areas Covered

Work is quoted across the Cape Town CBD and City Bowl, the Southern Suburbs, the Atlantic Seaboard, the Northern Suburbs including Durbanville, Bellville, Brackenfell and Kraaifontein, the West Coast corridor through Table View, Milnerton, Parklands and Melkbosstrand, Hout Bay and the South Peninsula down to Fish Hoek, and the Helderberg across Somerset West, Strand and Gordon's Bay.

Frequently Asked Questions