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Construction Defects
& Waterproof
Engineers
Engineered to stay dry. Built to outlast the rain.
Premium waterproofing, defect diagnostics and structural protection — trusted across Nigeria for over a decade.
Premium waterproofing, engineered for Africa’s climate
Waterseal Ltd is a Lagos-based engineering firm specialising in construction-defect diagnostics and high-performance waterproofing. From torrential monsoons to relentless equatorial sun, we design protection systems that keep structures dry, sound and standing for generations.
Our approach blends materials science with field-tested craft — diagnosing the root cause of every leak before specifying a solution. We don't just patch symptoms; we engineer permanence.
Read our story →Four reasons engineers and owners trust Waterseal
Engineered Approach
Every project begins with a forensic diagnosis. We treat the root cause, not the symptom — backed by materials science.
Premium Materials
We specify and apply only industrial-grade polymers, cementitious systems and membranes proven in tropical climates.
Proven Track Record
500+ projects delivered across Lagos, Abuja and beyond — from residential rooftops to commercial basements.
After-Care Guarantee
Our work doesn't end at handover. We stand behind every installation with a written guarantee and follow-up inspections.
To be a leading Construction Defects and Waterproof Engineering provider in Africa.
We are committed to providing our valued clients with dedication, cooperation, innovation, competitive pricing, the highest service quality and operational efficiencies across the construction industry.
Excellent quality, maximum value.
To provide an excellent quality of services and products that deliver maximum value to our clients in Nigeria and around the world.
Engineered solutions for every layer of your structure
Hover any module to reveal the technical specification of materials we deploy in the field.
Waterproofing Solutions
Full-spectrum waterproofing for roofs, walls, tanks and wet areas using premium polymer and cementitious systems.
MaterialsPolymer-modified cementitious coatings, 2-part epoxy injection resins, bituminous membranes — ASTM D412 tested.
Defect Investigation
Forensic diagnosis of leaks, cracks and structural failures — identifying root cause before any repair is specified.
MethodsMoisture mapping, capacitance meters, infrared thermography, core sampling to BS 6178.
Roof Waterproofing
Engineered roof protection for residential and commercial buildings, designed for tropical rainfall and UV exposure.
MaterialsTPO/PVC single-ply membranes, UV-stable acrylic topcoats, torch-applied modified bitumen.
Basement Sealing
Below-grade waterproofing that stops groundwater ingress and protects foundations from hydrostatic pressure.
MaterialsCrystalline waterproofing admixtures, bentonite panels, hydrostatic-pressure relief systems.
Concrete Repair
Structural concrete restoration — crack injection, spalling repair and reinforcement for long-term integrity.
MaterialsMicro-concrete repair mortars, epoxy/PU crack injection, corrosion-inhibiting primers.
Structural Protection
Long-life protection systems that defend reinforced concrete against corrosion, carbonation and chemical attack.
MaterialsAnti-carbonation coatings, cathodic protection, chloride-resistant admixtures to EN 1504.
Which waterproofing system fits your project?
A technical side-by-side of the systems we deploy most. Not sure? Our engineers will specify the right one after a free inspection.
From first leak to lifetime cover, in five steps
Free inspection
A certified engineer visits your site, maps every leak path and records the condition of the structure — at no cost to you.
Diagnosis & specification
We identify the root cause, not the symptom, and specify the exact waterproofing system your structure needs.
Transparent proposal
You receive a written scope, fixed pricing, materials list and timeline. No hidden extras — what we quote is what you pay.
Execution
Certified crews carry out the works with strict quality control at every stage, including water ponding tests before handover.
Handover & warranty
We test, document and hand over with a written warranty — then follow up after the first heavy rains to confirm performance.
What will your project cost?
Pick your project type and area size — get a rough estimate in seconds, no waiting required.
Premium coatings, formulated for the field
Our proprietary Waterseals product line — engineered, tested and trusted across Nigerian projects. Order direct via WhatsApp.
Waterseals Roof Coat Polymer 1K
High-performance waterproof coating for roofs, terraces, balconies, metal roofs, wood and bituminous surfaces. Supplied in 22kg PP buckets.
Waterseals Cementitious 2K Waterproof Coatings (Part A)
Advanced cement-based waterproofing for concrete structures — roofs, basements, retaining walls, lift shafts and dams. Supplied in 25kg PP buckets.
Waterseals Cementitious 2K Waterproof Coatings (Part B)
The reactive liquid component of the 2K cementitious system. Supplied in 7kg PP kegs — mixed with Part A on site.
Built work, standing the test of rain
Trusted by owners across Nigeria
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Field notes from our engineers
Engineering Featured Article
The importance of waterproofing: why choose Waterseals Limited?
Water is the single greatest threat to structural longevity. We break down why engineered waterproofing matters in Nigeria's climate — and what sets Waterseal's approach apart from the rest.
Read articleReady to protect what you’ve built?
Get a free, no-obligation quote from our engineering team. We'll diagnose the issue and specify a solution built to outlast the rain.
