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Expert GRP Roofing Solutions in Swansea
Established in Swansea, Superseal Glassfibre Roofing has built a reputation as a trusted provider of specialist roofing solutions. Our expertise lies in flat roofing systems, glass fibre (GRP) laminating, and architectural mouldings, serving industrial, domestic, and commercial clients across South Wales. With decades of combined experience, we utilise advanced GRP technology to deliver durable, watertight roofing membranes that outperform conventional systems. Our 20-year warranty reflects confidence in our materials and workmanship, supported by a team trained in precision installation and repair. We offer bespoke manufacturing services for GRP components, including custom designs aligned with architectural specifications.

Our industrial repair division addresses complex challenges in chemical containment, pipework reinforcement, and structural remediation. Operating throughout South Wales, we serve Carmarthen, Llanelli, Neath, Port Talbot, and surrounding areas. Our commitment to quality is demonstrated through rigorous R&D that expands GRP applications, ensuring innovative solutions for demanding environments. As a locally rooted business, we prioritise responsive service and technical expertise to meet client needs efficiently. Our transparent approach to project execution and customer communication has earned long-term trust within the community.
Services
Flat Roofing GRP Laminating Architectural Mouldings Industrial Repairs DIY Roofing Kits
Highlights and features
  • Specialists in GRP roofing systems since 1980
  • 20-year warranty on all installations
  • Bespoke architectural moulding manufacturing
  • Industrial GRP repair and chemical containment expertise
  • Serving South Wales for over four decades
Services
Flat Roofing
Our flat roofing systems utilise reinforced glass fibre (GRP) technology to create seamless, watertight membranes. The 600gsm glass mat construction provides superior strength compared to standard 450gsm systems, with a reflective light grey gel-coat finish reducing thermal movement. Each installation comes with a 20-year warranty, ensuring long-term protection against weathering and structural degradation in both domestic and commercial properties.
GRP Laminating
On-site GRP laminating services address industrial and commercial requirements for storage tanks, pipework, and chemical containment. Our technicians apply multi-layer resin systems to create corrosion-resistant linings for sumps, silos, and fluid containment vessels. This process extends asset lifespan while maintaining compliance with environmental safety standards across manufacturing and agricultural sectors.
Architectural Mouldings
In-house manufacturing facilities produce bespoke GRP mouldings to architectural specifications. We create decorative and functional elements including cornices, columns, and facade panels, alongside structural components for conservatories and extensions. Our pattern-making workshop enables precise replication of heritage designs while accommodating modern construction requirements.
Industrial Repairs
Specialist GRP repair teams address structural degradation in industrial environments. Services include acid tank linings, culvert rehabilitation, and protective coatings for steel and concrete infrastructure. Our solutions prevent further deterioration in harsh chemical environments while restoring operational integrity to processing facilities and water treatment plants.
DIY Roofing Kits
Pre-packaged GRP roofing kits provide professional-grade materials for self-installation. Each kit includes resin, gel-coat, and reinforcement materials with detailed application instructions. Designed for domestic projects like conservatories and extensions, these systems maintain commercial-grade durability while enabling cost-effective installations by competent DIYers.
Questions
What roofing systems do you specialise in?
We specialise in glass fibre (GRP) flat roofing systems, architectural mouldings, and industrial GRP repairs. Our solutions cater to residential, commercial, and agricultural properties across South Wales.
Do you offer warranties on installations?
Yes, all GRP roofing installations come with a 20-year warranty covering material defects and workmanship, reflecting our confidence in system durability and performance.
Which areas do you cover?
We operate throughout South Wales, including Swansea, Carmarthen, Llanelli, Neath, Port Talbot, and Bridgend. Our teams travel to both urban and rural locations for installations and repairs.
Can you repair existing GRP structures?
Yes, our industrial division provides GRP repair services for storage tanks, pipework, and chemical containment systems. We restore structural integrity while maintaining corrosion resistance in demanding environments.
Do you supply DIY roofing materials?
Yes, we offer pre-packaged GRP roofing kits with all necessary components and instructions for self-application. These systems maintain professional-grade quality for domestic projects like extensions and conservatories.
How does GRP compare to traditional roofing?
GRP systems offer superior waterproofing with fewer joints compared to traditional felt or asphalt. The reinforced construction provides greater durability, with our 600gsm mat being 33% thicker than standard systems, ensuring longer lifespan and reduced maintenance.