Installation and Performance of Strandek® GRP Structural Waterproof Membrane for Nature Wardens Sedum Green Roof at Cymmer Fire Station, Port Talbot
Introduction
Strandek Flat Roofing was recently instructed by Stafford Construction Ltd of Maesteg to install a Strandek GRP structural waterproof membrane at Cymmer Fire Station in Port Talbot. The system was specified as the primary waterproofing layer for the new Nature Wardens Green Roof Structure, designed to receive a sedum green roof covering installed by Ecogreen Gardens of North Cornelly.
Stafford Construction delivered the high-quality main structure, including the timber roof decking. The entire programme was coordinated efficiently between all parties to meet a demanding timescale, successfully overcoming periods of difficult weather conditions.
This application note outlines the tailored GRP installation, materials used, and the outstanding performance of the completed system, highlighting its suitability for sustainable green roof projects.
Materials and System Description
The project utilised Strandek’s proven fibreglass flat roofing system, engineered specifically as a tough structural waterproof membrane beneath living roofs:
- High-quality polyester resin reinforced with chopped strand mat glass fibre, applied directly over the prepared timber roof decking.
- Completed with a UV-protective flow coat to ensure long-term weather resistance.
- The seamless, monolithic GRP membrane creates a fully watertight barrier with exceptional strength and flexibility. It is capable of withstanding service foot traffic and the additional loading of a green roof system, while requiring virtually no maintenance. The system is designed for a service life exceeding 30 years.
Installation Procedure
Installation was carried out by Strandek’s certified technicians, working closely with Stafford Construction and Ecogreen Gardens to maintain the rigid project schedule despite adverse weather.
The process included:
1. Inspection and preparation of the high-quality timber roof decking installed by Stafford Construction.
2. Application of specialist primer for optimum adhesion.
3. Full GRP lamination: glass fibre matting embedded in catalysed resin, rolled to eliminate voids and built up in multiple layers for maximum strength.
4. Detailed lamination of all upstands, outlets, and perimeter edges to form a completely monolithic waterproof membrane.
5. Application of the final UV-protective flow coat.
Following curing and quality testing, the surface was immediately ready for the Sedum installation by Ecogreen Gardens.
Performance and Benefits
The Strandek GRP membrane has delivered outstanding performance as the structural waterproof base for the Nature Wardens Green Roof. Key benefits include:
- Exceptional durability and strength, easily handling foot traffic during the Sedum installation phase and beyond.
- Seamless, joint-free waterproofing that eliminates leak risk beneath the living roof layers.
- Low-maintenance, long-term reliability even in exposed coastal conditions.
- Perfect compatibility with the eco-friendly Sedum system, enabling visual appeal and significant environmental benefits including biodiversity support, stormwater attenuation, and improved insulation.
- The installation is supported by a 10-year insurance-backed guarantee and a 20-year Strandek workmanship guarantee, providing complete long-term protection.
Conclusion
The Strandek GRP structural waterproof membrane at Cymmer Fire Station exemplifies the ideal solution for modern green roof applications. By providing a robust, maintenance-free base, the system enabled Stafford Construction and Ecogreen Gardens to deliver a high-quality, sustainable Nature Wardens Green Roof that will offer years of environmental and visual benefits.
For specialist GRP waterproofing solutions on green roof projects, contact Strandek Flat Roofing. Established in 1976, we have installed thousands of flat roofs, with over 50 years of experience.