Water damage is the number one cause of building deterioration in Ghana. Rising damp, leaking roofs, wet bathrooms and flooded compounds silently destroy your investment. We fix it properly — with tested methods, quality materials and a written 6-month warranty.
Also known as waterproofing Ghana, roof waterproofing Accra, bathroom waterproofing Ghana services — all covered under one fixed-price Cornerstone contract.
Flat roofs, parapet walls and roof slabs are the most common source of water ingress in Ghana. We apply bitumen-based membranes, liquid waterproofing coatings and proper drainage solutions that last — not patch jobs.
Damp rising from the ground through walls leaves salt deposits, peeling paint and mould. We treat the cause with chemical damp-proof courses and render systems — not just a new coat of paint over the problem.
Wet rooms, bathrooms and kitchen areas need proper tanking before tiling. We apply tested waterproof membranes before any tile goes down — so water stays where it belongs.
Getting waterproofing right during construction is far cheaper than fixing problems after. We specify and apply the correct waterproofing system at foundation, slab and roof level on all new builds.
External render coatings, silicone treatments and weatherproof paint systems that stop rain penetration through external walls. Especially important in Ghana's rainy seasons.
Not sure what's causing your damp? We assess the building, identify every water entry point and give you a prioritised treatment plan with fixed costs. Free of charge, no obligation.
A free assessment takes 30 minutes and could save your building from serious structural damage. Book today.
Cheap waterproofing products fail — often within one rainy season. We use quality waterproofing systems from trusted manufacturers, applied correctly by trained operatives following manufacturer specifications.
The difference between good and bad waterproofing is not always visible at installation — it shows up when the rains come. That's why we back all our waterproofing work with a written 6-month warranty. If it leaks, we fix it free.
Waterproofing costs depend heavily on the area, method and severity of the problem. Basic bathroom tanking starts from GHS 1,500–4,000. Flat roof waterproofing for a 3-bedroom house typically runs GHS 8,000–20,000. Rising damp treatment is usually GHS 3,000–12,000 depending on the length of wall affected. We provide a fixed-price quote after a free assessment.
Quality waterproofing systems, correctly applied, should last 10–20 years. Cheap coatings or incorrect application can fail within one rainy season. We use quality products and back our work with a 6-month warranty — if it fails within 6 months, we fix it free.
Yes — the majority of our waterproofing work is on existing buildings. Rising damp treatment, roof waterproofing and external wall treatments are all retrofittable. We assess the existing condition and specify the best approach for each situation.
Failed waterproofing is usually caused by poor preparation, wrong product, too few coats or drainage not being resolved. We'll assess the existing system honestly and tell you exactly what failed and what the correct solution is — we don't just paint over the problem again.
| Waterproofing Type | Application | Cost per m² | Notes |
|---|---|---|---|
| Cementitious waterproofing | Wet rooms, flat roofs | GHS 45–80/m² | Two-component system. Most common in Ghana. Easy to apply |
| Crystalline waterproofing | Concrete structures, basements | GHS 85–140/m² | Penetrates concrete and self-heals minor cracks |
| Bituminous membrane (torch-on) | Flat roofs, terraces | GHS 95–160/m² | Most durable for exposed flat roofs. Professional application required |
| Liquid-applied membrane | Balconies, terraces, wet rooms | GHS 70–120/m² | Seamless. Good for irregular shapes |
| Rising damp treatment | Ground-floor walls | GHS 55–95/m² | Chemical DPC injection or cementitious barrier |
Flat concrete roofs are common on Ghanaian residential buildings and are the number one source of water ingress complaints. A flat roof without proper waterproofing and drainage will leak within one to three rainy seasons. The correct specification is a bituminous torch-on membrane or high-quality liquid-applied system, with proper drainage falls designed into the screed and water outlets that are maintained clear of debris.
Inadequate waterproofing behind bathroom tiles is the leading cause of tile debonding and mould growth in Ghanaian residential buildings. The wall and floor substrate must be fully waterproofed before any tiling begins — not after. Once tiles are laid over an unprotected substrate, the only fix is full tile removal and restart.
Rising damp through ground floor slabs is common in areas with high water tables — parts of Spintex, Kasoa, low-lying Tema plots. A properly installed damp-proof course (DPC) at slab level combined with perimeter drainage prevents this. Retrofitting rising damp treatment is expensive; building it correctly from the start is not.
Cementitious waterproofing in protected locations (wet rooms, tanks, below-ground) lasts 15–20 years. Exposed flat roof waterproofing (torch-on membrane) lasts 20–30 years. Elastomeric wall coatings need refreshing every 8–12 years. Annual inspection of exposed roofs and terraces is recommended — catching a small defect early prevents major water damage.
No — no waterproofing system permanently bridges a crack that is still moving due to structural movement or thermal cycling. The cause of the movement must be identified and addressed (usually by a structural engineer) before waterproofing is applied. Applying membrane over an active crack provides temporary relief only.
Yes — bathroom waterproofing before tiling, flat roof waterproofing on all concrete decks, and DPC/anti-termite treatment are included as standard in all Cornerstone residential construction contracts. We do not omit these items to reduce price.
Make sure you have the right information before committing to any construction project in Ghana. These are our most-read guides:
We visit your plot at no charge and no obligation. During the site visit we assess soil conditions (critical for foundation type and cost), confirm plot dimensions, evaluate access for materials delivery, and identify any site-specific constraints that will affect the build. This visit is what makes our quote accurate rather than estimated — and it costs you nothing.
Your quote lists every material item (quantity and unit cost), every labour operation, supervision, professional fees, permit fees, and contingency — separately. You can compare every line against current market prices. We do not use lump-sum estimates. Transparency is how we earn trust and verify value simultaneously.
Once you are ready to proceed, we sign a fixed-price construction contract before any money changes hands. The contract specifies: the complete scope of work; the fixed contract sum; the payment schedule (tied to milestones, not dates); the completion timeline; and a 6-month workmanship warranty. The price in the contract is the price you pay — it cannot be changed without a signed change order agreed by both parties.
Your crew is assigned exclusively to your project — not shared across four or five other sites. Each day, your dedicated project manager sends WhatsApp site photographs from the build. This is particularly important for diaspora clients who cannot visit the site regularly — you see exactly what is being built, at what stage, in real time. If any issue arises on site, you hear from us before it becomes a problem.
Payments are released against verified construction milestones, not against calendar dates. Our standard residential schedule: 30% on contract signing and site mobilisation; 40% on completion of structural works (foundation, walling, slab, and roofing); 30% on practical completion and handover. You do not pay for the next phase until the previous phase is confirmed complete — protecting your money throughout the project.
Every Cornerstone project carries a 6-month written workmanship warranty from handover date. Any defect in our workmanship — cracked plaster, roof leak at a junction we installed, failing tile adhesion, faulty fitting — is corrected at our cost within the warranty period. We provide this warranty in writing because we are confident in our work. We can also provide references from clients who have tested the warranty and confirm it was honoured without dispute.
Free assessment. Fixed-price quote. 6-month warranty on all waterproofing work. Don't let another rainy season damage your building.
Get a Waterproofing Quote 💬 WhatsApp KwakuCornerstone Build Ghana is a licensed construction company serving Greater Accra and beyond — residential, commercial, renovation, and civil works. We are classified under Ghana's contractor registration scheme and can provide our certificate on request.
Our fixed-price approach means the number in your contract is the number you pay. We do not request additional funds mid-build without a signed change order. Our dedicated crew works exclusively on your project until completion, supported by daily WhatsApp site photographs and a 6-month workmanship warranty from handover.