Roof Waterproofing Specialists
Advanced Waterproofing Solutions
Trusted Roof Waterproofing Company Serving South Africa
Roof waterproofing seals a roof against water ingress by treating laps, joints, penetrations and fixings, then applying a flexible membrane or coating system across the substrate. Sicon Group waterproofs industrial, commercial and retail roofs across all nine South African provinces, backed by guarantees of up to 20 years.
Sicon Group is South Africa's trusted partner in Roof Waterproofing, delivering durable solutions for Industrial, Commercial and Retail properties nationwide. With over 25 years of expertise, our team specialises in advanced waterproof roof coating systems that protect buildings from leaks, weather damage and costly repairs. As one of the leading waterproofing companies in the country, we combine technical excellence, high-performance materials and safety-first practices to ensure long-lasting protection on every roofing project we undertake, anywhere in South Africa.
Waterproofing is delivered nationwide from our Gauteng head office and regional branches in every province. Where water ingress needs to be traced before it can be sealed, we also provide roof leak diagnosis, and where the substrate itself has deteriorated, complete roof restoration.
Call now on 083 345 4649 to receive your FREE roof inspection, which includes full photographic analysis and problem identification report accompanied by a no-obligation FREE quotation, tailored to suit your specific requirements & budgetary needs.
Prevent Leaks & Protect Your Property with Expert Roof Waterproofing
The images below are from completed Sicon Group waterproofing work on industrial, commercial and retail buildings across South Africa. They show the standard of finish our teams deliver on site, from torch-on membrane systems and liquid-applied coatings through to flashing details and parking deck waterproofing.
What Roof Waterproofing Services Does Sicon Group Offer?
Sicon Group waterproofs industrial and commercial roofs using torch-on membranes and liquid rubber or acrylic systems, sealing the joints, seams, fixings, parapets and flashings where water most often gets in.
- Torch-On Membrane Systems : Engineered for complex metal roof interfaces and details, ensuring durable, high-performance waterproofing
- Liquid Rubber & Acrylic Solutions : Flexible, seamless coatings that bond effectively to metal surfaces, extending roof life and sealing against leaks
- Metal Roof Joint & Seam Protection : Specialised treatment of overlaps, fixings, and fastener points to eliminate common sources of water ingress
- Corrosion Prevention & Surface Sealing : Protective roof waterproofing systems that stop rust and deterioration of ageing or exposed metal roofing
- Parapet & Flashing Reinforcement : Critical sealing of perimeter details and flashings to prevent water entry at roof-wall junctions
Why Choose Sicon Group for Roof Waterproofing?
- Leak Prevention Guaranteed : Proven systems that stop water before it starts
- Industry-Approved Materials : Using only premium-grade waterproofing products
- Certified Waterproofing Specialists : Trained crews with years of expertise
- Long-Term Cost Savings : Reduce future damage and repair expenses
- Full COC & Warranty Provided : All work comes with documentation and support
What Experience and Certification Does Sicon Group Have?
- 25+ Years of Expertise : Specialists in roof sealing & roof waterproofing
- ISO-Compliant & Accredited : Working to ISO 9001, 14001 & 45001 standards
- High-Performance Roof Waterproofing Materials : Designed for maximum durability
- Guaranteed Results : Up to 20-year warranties on waterproofing systems
- Fast & Efficient Application : Minimal disruption to business operations
Which Industries Does Sicon Group Waterproof For?
Sicon Group waterproofs industrial, commercial, retail and multi-unit residential buildings, from factory roofs and warehouses through to office parks, shopping centres and high-rise parking decks.
- Industrial Buildings & Factories : Leak-proofing for metal & concrete roofs
- Commercial & Office Buildings : Protecting business parks, malls & retail centres
- Warehouses & Storage Facilities : Ensuring weatherproof protection for inventory
- Residential Complexes & High-Rises : Waterproofing balconies, basements & parking decks
Which Roof Waterproofing Systems Does Sicon Group Install?
Sicon Group installs five main waterproofing systems: liquid membrane, torch-on bitumen, cementitious, polyurethane, and reflective roof coatings. The right choice depends on the substrate, the roof's exposure, expected foot traffic and how much movement the structure sees.
Liquid Membrane Waterproofing
A seamless, flexible waterproofing system that adheres to various industrial surfaces including metal, concrete, and parapet walls. It cures into a UV- and moisture-resistant film that adapts to structural movement, ideal for flat roofs, tile roofs, concrete roofs, metal roofs and areas prone to pooling.
Torch-On Waterproofing Solution
A durable, multi-layered bitumen membrane applied using heat fusion technology, ideal for industrial, commercial, and flat roofing systems. Torch-on waterproofing offers long-lasting protection against extreme weather, foot traffic, and mechanical stress. It prevents cracks, leaks, and structural deterioration over time. We offer both standard torch-on systems finished with silver UV-reflective coatings and mineral torch-on membranes, which feature a durable stone-chip surface for maintenance-free performance. Both options deliver excellent waterproofing and extended roof lifespan, with energy-efficient benefits where required.
Cementitious Waterproofing
A cement-based barrier ideal for concrete roofs, parapet walls, basements, commercial, and retail buildings. Offers strong adhesion and durable protection against water ingress, perfect for structural slabs and underground industrial elements.
Polyurethane Waterproofing
A high-performance, elastic solution ideal for roofs with thermal expansion, complex detailing, or chemical exposure. It offers crack resistance, seamless coverage, and is suitable for commercial, retail, and high-traffic industrial surfaces. Its long-lasting flexibility makes it especially effective for environments exposed to constant movement or harsh conditions.
Roof Coating and Sealants
We apply protective waterproof coatings that guard roofing systems from UV radiation, moisture, and environmental wear. Reflective options help reduce heat absorption and improve energy efficiency, easing the load on HVAC systems. Suitable for both new installations and restorations, these coatings prevent surface deterioration, leakage, and extend the lifespan of industrial and commercial roofs.
How Do You Choose the Right Waterproofing System?
The right system depends on five things: whether the roof is flat or sloped, how exposed it is to sun and weather, how much foot traffic it carries, what the substrate is made of, and the balance between upfront cost and expected lifespan.
Flat Roofs versus Sloped Roofs
Not all roof types can be treated the same. Roof structure directly impacts the choice of waterproofing system. Flat roofs tend to collect water, making them ideal for liquid-applied membranes that provide seamless, ponding-resistant coverage. In contrast, sloped or pitched roofs typically benefit from torch-on systems that follow the gradient and provide layered, directional runoff protection. Choosing the wrong method for your roof's design can lead to pooling, premature failure, or ineffective sealing.
Exposure to UV and Weather
Roofs that endure constant sun exposure, heavy rain, or temperature extremes require waterproofing systems that offer both chemical and thermal resilience. Performance acrylic systems, polyurethane coatings and UV-reflective sealants are designed for these conditions, offering superior resistance to cracking, discolouration, and heat absorption. By reflecting sunlight and withstanding expansion and contraction, these solutions extend roof lifespan, improve comfort inside the building, and reduce maintenance needs caused by harsh environmental wear.
Building Function & Foot Traffic
Certain areas like commercial and retail roofs, access routes, service platforms, and high-traffic roof areas are subject to regular movement and load-bearing from foot traffic. These spaces require flexible, traffic-tolerant waterproofing systems, such as performance acrylic systems or polyurethane, which adapt to vibrations and minor structural shifts without failing. Using rigid or brittle materials in these zones risks surface cracking and water ingress. Functional waterproofing in high-traffic zones must balance durability with flexibility to protect both the surface and the underlying structure.
Substrate Material Compatibility
The type of material underneath your waterproofing system, known as the substrate, is critical for long-term adhesion and performance. Concrete surfaces typically benefit from cementitious waterproofing, which binds effectively and adds structural protection. Older roofing or bitumen-based layers respond better to torch-on membranes, which chemically bond with similar materials. Choosing a system that's chemically compatible with the substrate ensures strong adhesion, minimal preparation, and long-lasting waterproofing.
Budget versus Longevity on Roofs
Selecting the right waterproofing solution involves balancing initial investment with long-term performance. For large areas or tight budgets, torch-on membranes offer excellent durability and protection at an affordable rate. For premium results, especially in sensitive or high-value areas, performance acrylic systems or polyurethane systems provide extended lifespan, superior flexibility, and minimal maintenance. Understanding the trade-offs between upfront cost and expected durability helps you choose the best value solution for your specific project.
Roof Waterproofing Projects
Torch-On Waterproofing
Sicon Black Leak Attack
Sicon Black Leak Attack is Sicon Group's own black liquid-applied waterproofing compound, used to seal roof sheets, laps, bolt fixings, corner details and below-ground walls. It bonds to metal, concrete and tile, forming a seamless flexible barrier where water is getting in.
Roof Waterproofing FAQs
What is the difference between torch-on and liquid waterproofing?
Torch-on is a multi-layered bitumen membrane heat-fused to the roof, which suits sloped roofs and areas carrying foot traffic or mechanical stress. Liquid waterproofing is applied as a seamless coating that cures into a flexible film, which suits flat roofs, complex detailing and areas prone to ponding. The right choice depends on the roof's slope, substrate and exposure.
How long does roof waterproofing last?
It depends on the system specified and how exposed the roof is. Sicon Group backs its waterproofing with warranties of up to 20 years. Reflective coatings and planned roof maintenance extend service life further by reducing UV and thermal stress on the membrane.
Can waterproofing be applied over an existing roof?
In many cases, yes. Older roofing and bitumen-based layers can be overlaid with torch-on membranes, which bond chemically to similar materials. The deciding factors are the condition of the substrate and its compatibility with the system, both established during the free roof inspection before anything is specified. Request an inspection to have the roof assessed.
Does Sicon Group waterproof residential complexes?
Yes. Sicon Group waterproofs multi-unit residential buildings including complexes, apartment blocks and body corporate developments, typically roofs, balconies, basements and parking decks. It does not take on individual private homes.
Need More Detail on Roof Waterproofing?
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Step 2: Select the service you require more information on.
Step 3: Click on send query.
Sicon Group will then provide you with a detailed description/overview breakdown report on the requested service, as well as a Sicon Group specialised product report.
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