Waterproofing & Protective Coatings
Waterproofing and protective coatings in Accra, Ghana — liquid-applied roof, wall, and wet-area membranes that stop rising damp, roof leaks, mould, and salt efflorescence in the wet-season and coastal climate, with documented preparation and verified film build. City Painting Ghana, since 1983.
Waterproofing is a continuous protective system that keeps water out of a building’s roof, walls, and wet areas using liquid-applied membranes engineered to the substrate and exposure. City Painting Ghana has specified and applied waterproofing across Accra, Kumasi, and Tema since 1983, detailing the junctions where membranes actually fail and verifying the film build.
Why Waterproofing Matters in Ghana’s Conditions
Water is the most persistent threat to a building, and in Ghana’s wet-season and coastal climate it is relentless. The April–October rains drive water at every weak point; high humidity keeps walls damp long enough to feed mould; and along the Accra and Tema coast, salt-laden sea breeze pulls moisture and salts through masonry, leaving white efflorescence on new buildings before they are even occupied. A failed roof or wall membrane does not announce itself politely — it tracks through structure, ruins interior finishes, corrodes embedded steel, and reaches occupied rooms as staining and damp long after the leak began.
We treat waterproofing as a system, not a coat of paint. We trace where water actually enters, prepare and detail the critical junctions where membranes fail, and verify the build — so the envelope keeps water out across the whole maintenance cycle, not just through the first wet season.
Waterproofing Systems We Offer in Accra
Roof & Deck Waterproofing
Flat and low-slope roofs are the leading source of leaks in Accra. We apply liquid-applied membranes — elastomeric where the roof moves and cracks — over a cleaned, repaired, and re-fallen surface, with drains, upstands, and parapets reinforced first. A correctly specified roof membrane carries through the rainy season for years rather than failing at the next downpour.
Wall Waterproofing & Rising-Damp Treatment
Porous walls let the coastal sea breeze drive moisture and salt into masonry, causing rising damp, mould, and the white efflorescence so common on new Accra buildings. We treat the wall with a breathable waterproofing system that stops ingress at the source, rather than painting over stains that return after the next rains.
Wet-Area & Below-Grade Tanking
Bathrooms, plant rooms, balconies, and below-grade transitions are tanked to manage moisture and protect the structure and spaces below. These wet areas leak silently into adjacent rooms, so the membrane is detailed around drains, thresholds, and penetrations before tiling or finishing.
Applications Across Ghana
- Flat and low-slope roofs and podium decks requiring continuous membrane protection across Airport City, Spintex, and Tema
- Boundary and façade walls suffering rising damp, mould, and coastal salt efflorescence in East Legon, Cantonments, and Labone
- Bathrooms, plant rooms, and wet areas requiring tanking and moisture control
- Balconies, parapets, basements, and critical junctions where membranes are most prone to fail
How We Waterproof a Roof
- Survey & leak diagnosis — a free on-site survey traces where water actually enters and grades the substrate to ISO 8501, because waterproofing the wrong surface fixes nothing.
- Surface preparation & repair — the surface is cleaned to a sound base, cracks cut out and filled, ponding corrected, and moisture checked, since a membrane debonds on a damp or unsound base.
- Detailing critical junctions — upstands, drains, parapets, and penetrations are reinforced with membrane and mesh before the field coat, because these details fail first.
- Membrane application & verification — the liquid membrane is built up in the specified coats, film build verified to ISO 2808, adhesion to ASTM D3359 where needed, and the work handed over with a documented record.
Comparing Waterproofing Systems
| System | Where it is used | Best for | Where in Accra |
|---|---|---|---|
| Roof / deck liquid membrane | Flat and low-slope roofs, podium decks | Stopping rainy-season roof leaks | Airport City, Spintex, Tema |
| Elastomeric crack-bridging membrane | Moving, cracked roofs and surfaces | Substrates that flex and crack | Across Greater Accra |
| Wall waterproofing system | Porous walls, rising damp, salt efflorescence | New builds and coastal walls | East Legon, Cantonments, Labone |
| Wet-area / below-grade tanking | Bathrooms, plant rooms, basements | Silent internal water ingress | All residential and commercial |
What Affects the Cost in Accra
- The system specified (roof, wall, wet-area, or below-grade)
- The condition of the substrate and how much crack repair, re-falling, or stripping is needed first
- Area (m²), roof access, and the number of critical details to reinforce
- Exposure — coastal sites and chronic leaks demand higher-spec elastomeric systems
- Whether ageing membrane must be removed or can be over-coated
Every quote follows a free on-site survey — no fixed price is given before the surface is inspected and the source of water traced.
Areas We Serve
City Painting Ghana applies waterproofing and protective coatings across Greater Accra — East Legon, Airport Residential, Cantonments, Labone, Roman Ridge, Dzorwulu, Trasacco, Spintex, Osu, and Tema — as well as Kumasi and Takoradi.
Related Services
- Specialty Industrial Coating — epoxy floors and decorative and performance systems
- Commercial Exterior Painting — weatherproof façade systems for Ghana’s climate
- Intumescent Fire Protection Coating — certified passive fire protection for structural steel
Frequently Asked Questions
How do I stop my roof leaking in the rainy season in Accra? A leaking flat or low-slope roof in Accra is most often fixed with a liquid-applied membrane: the surface is cleaned and repaired, ponding spots corrected, drains and upstands detailed, then the membrane is built up over the whole roof. We survey to find where the water actually enters before quoting, because patching the wrong spot wastes money.
What causes rising damp and salt stains on a new building in Ghana? Rising damp draws ground moisture up through walls, and as it evaporates it leaves white salt deposits called efflorescence — common on new Accra buildings where block and screed are still curing. We treat the source with a wall waterproofing system rather than just painting over the stains, which return otherwise.
How much does waterproofing cost in Accra? Waterproofing is quoted per square metre after a free on-site survey, because the price depends on the system, the area, the substrate condition, and how much repair is needed first. We never give a fixed price before inspecting the surface.
Does waterproofing stop mould on interior walls? Yes, when the source is external water — a leaking wall, roof, or wet area letting moisture into the structure. We stop the ingress with the right membrane and address the damp wall, so the mould does not simply grow back after the next rains.