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Waterproofing services in Cape Town
From a parapet leak on an Atlantic Seaboard apartment block to rising damp on a Cape Flats bungalow — every service below is handled by the same Cape Town team. Free on-site inspection and a fixed written quote, every time.
Core Waterproofing
Roof Waterproofing
Vetted Cape Town specialists for flat, pitched and tiled roof waterproofing — torch-on bitumen, liquid membranes, acrylic coatings, polyurethane systems with 10-year workmanship guarantees.
- 10-year workmanship guarantee on every installation
- Manufacturer-approved applicators (Index, Derbigum, Sika, Plascon)
- Free no-obligation roof inspection before quoting
From R220/m²
2026 indicative ZAR pricing. Torch-on R220-R380/m², liquid acrylic R150-R260/m², polyurethane R350-R550/m². Final quote on-site.
Damp Treatment
Damp Proofing
Damp proofing across Cape Town — our team diagnoses and treats rising damp, penetrating damp, lateral damp and condensation in Sea Point apartments, City Bowl Victorian terraces, Constantia Cape Dutch homesteads and Cape Flats face-brick housing.
- Diagnosis first — our technician surveys with a moisture meter before specifying any chemical treatment
- We separate rising, penetrating and lateral damp on the survey — each pattern has a different cure and different cost
- Free written moisture-survey report you can keep, regardless of whether you proceed
From R650/linear m
2026 indicative ZAR pricing for Cape Town metro work. Chemical DPC injection R650-R1,100 per linear metre. Salt-neutraliser plus breathable render R450-R900/m². Penetrating damp wall treatment R350-R650/m². Coastal jobs in Sea Point, Hout Bay, Strand and Gordon's Bay may carry a salt-loading uplift. Survey is free; the final quote is written on site once the meter reading is in.
Rising Damp Treatment
Chemical DPC injection to BS 6576, hack-off to 300mm above the tide-mark, and SR1/SR2 salt-resistant render — backed by a 10-year workmanship guarantee on properly diagnosed rising damp.
- Permanent silane/siloxane chemical barrier injected to BS 6576 — the British Standard the manufacturer warranties (Dryzone, Permagard, Safeguard) are written against
- Salt-neutraliser primer applied before re-render, so hygroscopic nitrates and chlorides don't pull humidity out of the air and re-bloom
- Hack-off carried 300mm above the highest visible damp line — not the 100mm overlap most cheap quotes try to get away with
From R450/m linear
Chemical injection is R450-R900 per linear metre depending on wall thickness (115mm single skin in Langa stock vs 220mm double-leaf in Observatory and City Bowl vs 340mm cavity in newer Macassar builds). The re-render is the larger line item at R260-R420/m² for SR1 spec, R380-R520/m² for SR2 where salt loading is heavy. Typical Athlone bungalow elevation of 6-7m treated to 1.2m height runs R9,500-R15,000 all-in. Quotes below R400/m linear almost always use uncertified product and void the manufacturer warranty — ask for the applicator certificate number before paying a deposit.
Emergency Repairs
Roof Leak Repairs
Emergency leak detection and same-week patch repairs anywhere in Cape Town — from Sea Point apartment parapets to Mitchells Plain IBR roofs. Our crew responds during south-easterly and north-westerly storm fronts.
- Storm-season response from a Cape Town crew — typically on site within 4–24 hours during active rain events
- Structured leak diagnosis (visual, dye trace, smoke test, thermal imaging on flat roofs) instead of guesswork sealant
- Temporary weatherproofing on the first visit so damage stops before the permanent repair is scheduled
From R850 (call-out)
2026 indicative ZAR pricing. Diagnostic callout R850–R1,500 (credited against repair if you proceed). Single-point patch repair R1,500–R3,500. Re-flashing of parapet aprons, chimney chases or valley flashings R3,000–R7,500. Multi-point membrane patching or extensive torch-on lap repair R6,000–R15,000. Final scope confirmed after on-site diagnosis.
Membrane Systems
Torch-On Waterproofing
Approved-applicator torch-on waterproofing across Cape Town — 3mm and 4mm Index, Derbigum and Sika membranes heat-fused to flat concrete roofs, parapets and balcony slabs.
- Current Index Argo, Derbigum SP4 and Sika Torch approved-applicator credentials in hand for every job
- Both single-layer 4mm and double-layer 3mm + 4mm SANS 10021 systems specified on quote so the comparison is honest
- Workmanship guarantee of 10 years backed by a 15-year Derbigum (or equivalent) membrane warranty
From R220/m²
2026 indicative ZAR pricing. Single-layer 4mm torch-on R220–R280/m². Double-layer 3mm + 4mm system R300–R380/m². Add R80–R150/linear m for parapet upstands and R450–R900 per drain/penetration detail. Substrate repairs and screed-to-falls quoted separately.
Roof Type Specialists
Flat Roof Waterproofing
Cape Town flat-roof waterproofing — torch-on bitumen, liquid polyurethane and acrylic systems engineered to survive south-easter uplift, Atlantic salt spray and winter cold-front deluges.
- Systems specified to BS 8217 / SANS 10400 wind-uplift loads for Cape Peninsula exposure
- Membranes selected for ponding tolerance — critical on older slabs that have settled out of fall
- Reflective top-coats and mineral chip finishes that hold up under Atlantic UV without chalking
From R150/m²
Indicative 2026 ZAR rates, system-dependent. Reinforced liquid acrylic R150–R260/m² for refurbs on sound substrates; torch-on bitumen R220–R380/m² on concrete decks (the long-life default); liquid polyurethane R350–R550/m² for complex roofs with many penetrations or where 20+ year life is required. Final pricing fixed after the on-site fall and ponding survey.
Exterior Living Spaces
Balcony & Deck Waterproofing
Cape Town balcony, deck and entertainment-patio waterproofing — Sea Point apartments, Camps Bay decks and Bantry Bay cantilever balconies. Tile-lift, liquid membrane, granolithic screed and flood-tested reinstatement.
- 150mm upturn detailing at every wall junction and balustrade fixing — the single biggest source of failure on coastal balconies
- Flood-test against the unit below for a full 24-48 hours before any tile or screed reinstatement
- Granolithic screed laid to a verified 1:80 minimum fall — no eyeballing, every outlet checked with a spirit level
From R280/m²
2026 Cape Town rates. Liquid PU membrane only (substrate already sound) R280-R450/m². SBS torch-on bitumen R350-R600/m². Full strip + waterproof + granolithic screed + re-tile R600-R1,100/m² (tiles excluded). Body-corporate scopes priced per unit count after the survey — typically R45,000-R90,000 per balcony for a 12-unit Sea Point block.
Below-Grade Waterproofing
Basement & Foundation Waterproofing
Cape Town basement and foundation waterproofing — interior cementitious tanking, crystalline systems (Xypex, Penetron), cavity drain membranes and sump-and-pump installations for cellars, converted garages and cliff-side retaining walls.
- Interior-only solutions when exterior excavation is not practical — the reality on 95% of existing Cape Town homes
- Crystalline integral systems (Xypex, Penetron, Krystol) that grow self-sealing crystals into existing concrete
- Cavity drain membrane + sump installations (Delta MS, Newton CDM) where the slab cannot be raised
From R380/m²
2026 Cape Town pricing. Cementitious tanking R380-R650/m². Crystalline integral systems R450-R800/m². Bentonite membrane (excavated installations) R550-R950/m². Cavity drain membrane systems R600-R1,100/m² including sump and pump. French drains R450-R900 per linear metre. Engineer fees and any excavation, shoring or scaffolding quoted separately.
Protective Coatings
Roof Coating & Painting
Cape Town roof coating and protective painting specialists — Plascon Roof Care, Dulux RoofGuard and Earthcote polyurethane systems for tiles, concrete and IBR sheeting.
- Halts the chalking that turns concrete and clay tiles dusty under Cape Town's 8-10 hour summer UV days
- Reflective light-grey or white finishes drop loft-space temperatures 4-7°C on a 35°C day
- Bonds surface porosity and micro-cracks so wind-driven rain stays on the outside of the tile
From R150/m²
2026 indicative ZAR rates. Acrylic coating R150-R260/m² (Plascon, Dulux at 5-9 m²/L), polyurethane R280-R450/m² (Earthcote, Sika), tile sealing R120-R200/m². Pressure-cleaning and crack repairs are quoted separately after the on-site inspection — never bundled blind.
Ancillary Services
Gutter Repair & Cleaning
Pre-winter gutter cleaning, aluminium seamless replacement and heritage cast-iron repairs across Cape Town — booked out the May cold front before it arrives.
- Gutters cleared and flushed before May stops the overflow that creates rising damp signatures on lower walls and rot on softwood fascias
- Continuous-seamless aluminium runs we fabricate on-site carry a 15–20 year working life — three to four times what a PVC profile gives you in Cape sun
- Marine-grade aluminium plus stainless-steel fasteners on coastal jobs (Fish Hoek, Strand, Muizenberg) eliminate the corrosion bloom that ruins galvanised systems inside a decade
From R450 (cleaning, single-storey ≤15m run)
Clean-and-flush: R450–R900 single-storey, R900–R1,500 double-storey or extended footprints (Constantia, Plumstead, Bergvliet). Joint and bracket repairs run R180–R400 per linear metre depending on access and how many joints are failing. Continuous-seamless aluminium replacement: R250–R550 per linear metre installed, with marine-grade upgrade and stainless fasteners adding roughly 15–20% on coastal jobs. Heritage cast-iron section replacement is quoted individually — sourcing dictates the price. Leaf-guard mesh runs R80–R150 per linear metre.
Roof Cleaning
Pressure-wash moss, lichen and algae from roof tiles, plus fungicide treatment and gutter clear-out — the essential prep step before any waterproofing or coating job.
- Mandatory prep step — manufacturer roof-coating warranties (Plascon, Dulux, Earthcote) are void if the substrate isn't professionally cleaned and treated first
- Soft-wash and biocide treatment kills moss and lichen at the root, preventing regrowth for 3–5 years versus 6 months for a pressure-wash alone
- Local contractors know which Cape Town roofs (Welgemoed oak-shade tile roofs, Bellville flat IBR) need which approach — high-pressure damages tile glaze, low-pressure won't shift heavy lichen on metal
From R3,500 (single-storey tile roof, ≤120m²)
Tile soft-wash + biocide: R30–R55/m² depending on moss load and access. IBR or metal pressure clean: R25–R45/m². Bundled clean + roof coating: typically R85–R140/m² combined (saves vs separate quotes). Double-storey homes (Welgemoed, Plattekloof) add 20–30% for scaffolding and harness setup. Always get the cleaning + coating quoted together if you're planning to coat — it's substantially cheaper than booking the two trades separately.
Interior Wet Areas
Wall & Shower Waterproofing
Cape Town specialists in internal wet-area tanking and external wall sealing. Mapegum WPS, Sika Seal Tape and Super Laycryl under tile, with a dye-traced diagnosis and a 10-year guarantee.
- Dye-traced leak diagnosis before quoting — we don't guess which wall to open up
- 24-hour ponding test on every internal job, photographed at 0h and 24h
- Sika Seal Tape bedded at every corner — the failure point in 9 out of 10 leaking showers
From R3,800 per shower
2026 indicative ZAR pricing. Sealer + epoxy regrout on a sound substrate R3,800-R7,500 per shower. Full strip, tank and retile R8,500-R19,000 depending on tile spec and the size of the enclosure. External west-wall sealing R95-R190/m² (penetrating silane vs elastomeric pigmented coating). Sectional-title work in apartment blocks quoted per stack with multi-unit discounts.
Not sure which waterproofing system you need?
Most homeowners come to us with a leak, not a system in mind. The free on-site inspection is where we work out whether it's torch-on, liquid membrane, damp injection or basement tanking — and we put the recommendation in writing.