FlexiProof EPDM: Manufactured by TRC
The highest-quality EPDM membrane available in the UK — extruded to the world’s most rigorous standards and backed by 9 globally recognised certifications.
FlexiProof is TRC’s original UK partner — the first to bring TRC EPDM to the British market in 2016.
Original UK Partner
FlexiProof has been TRC’s authorised UK partner since 2016 — the first to bring TRC EPDM to the British market.
Extruded — Not Calendered
TRC uses the most advanced EPDM manufacturing process — extrusion — delivering superior consistency and fewer defects than calendered alternatives.
9 Global Certifications
Certified to UK, EU and US standards — from fire resistance to root penetration, from environmental performance to quality management.
Why the manufacturer matters
Not all EPDM is the same. The quality of a rubber roofing membrane depends almost entirely on how it was made. The most important parts of this are the compound formulation, the manufacturing process and the quality of the management systems behind it.
FlexiProof EPDM membranes are produced by TRC (Techno Rubber Company), a world-leading EPDM manufacturer based in Saudi Arabia. TRC membranes are the highest quality EPDM membranes available. TRC’s state-of-the-art facility is ISO 9001 certified, CE marked and produces over 10 million m² of EPDM annually.
In 2016, FlexiProof became the first company to bring TRC EPDM to the UK market. This is a milestone that remains central to who we are. Being first to raise standards in the market for cold-applied flat roofing systems.
While TRC membranes are now distributed across Europe, FlexiProof remains TRC’s original and longest-established authorised UK partner, backed by robust logistics and dedicated technical support.
The result: the highest-specification EPDM membrane available in the UK, certified worldwide and trusted nationwide.
Certified worldwide — 9 globally recognised accreditations
ISO 9001ISO 9001:2008 International quality management certification — guarantees consistent product quality from raw material through to finished membrane. For you: Every roll meets the same exacting standard, every time. |
CE MarkedCE Mark — EN 13956:2012 EU certification confirming the membrane meets European health, safety, and environmental standards for waterproofing products. For you: Compliant with EU building regulations and specifications. |
B Roof T4B Roof (T4) — Fire Resistance Tested to UK and EU standard EN 13501-5, confirming high resistance to ignition and flame spread under severe fire conditions. For you: Meets fire resistance requirements for UK building regulations. |
ASTM D4637ASTM D4637 US standard specification for EPDM single-ply roofing membranes — demonstrates performance meets North American requirements. For you: Internationally recognised quality benchmark, beyond UK/EU requirements. |
Root ResistantRoot Penetration Resistance Certified to ASTM D8014, BS EN 13948, and ANSI/SPRI VR-1 — validated protection against root damage in green and living roof systems. For you: Approved for green roofing and planted roof applications. |
ISO 14025 EPDISO 14025 — Environmental Product Declaration (EPD) For you: Supports BREEAM, LEED, and other green building certification schemes. |
ATG 3236EATG 3236E — Belgian Technical Approval Rigorous audit and testing by UBAtc (Belgian Union for Technical Approval in Construction) — confirming durability and compliance with industry standards. For you: Recognised across European specification and construction projects. |
KOMO® CertifiedKOMO® Productcertificaat SGS Netherlands-certified quality mark — a trusted Dutch construction industry standard confirming quality, regulatory compliance, and installation performance. For you: Recognised in European merchant and specification networks. |
EN 15804
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Full certification detail
The certifications below are linked to the FlexiProof One Piece and Fleece Backed EPDM membrane ranges manufactured by TRC. Tap any product name to view the product page.
ISO 9001:2008 — Quality Management
TRC’s manufacturing facility is certified to ISO 9001:2008, the international standard for quality management systems. Certification requires demonstrating consistent processes, quality controls, and continuous improvement, from raw material sourcing through to finished membrane production.
In practice: Every roll of FlexiProof EPDM membrane is produced to the same documented quality standard. Batch-to-batch consistency is verified. You know what you’re getting, the highest quality EPDM membranes available.
CE Mark — EN 13956:2012
CE marking (Conformité Européenne) confirms the membrane complies with EU health, safety, and environmental requirements. TRC membranes are CE marked under EN 13956:2012, the European standard for flexible sheets used in roof waterproofing.
In practice: Specifiers and contractors can reference CE marking for compliance with UK and EU building regulation requirements. CE marked membranes carry legal standing for use in regulated construction.
B Roof (T4) — Fire Resistance
TRC membranes are tested to EN 13501-5, the European fire classification standard for roofing materials exposed to external fire. The B Roof (T4) rating demonstrates high resistance to both ignition and flame spread under severe fire exposure conditions.
In practice: The B Roof (T4) rating satisfies fire resistance requirements specified for flat roof systems under UK Building Regulations. It is a requirement for many commercial, residential, and mixed-use construction projects.
Root Penetration Resistance
Certified to three standards — ASTM D8014 (USA), BS EN 13948 (UK/EU), and ANSI/SPRI VR-1 (USA) — TRC membranes are verified to resist root penetration in vegetated and green roofing applications. Testing covers both standard and aggressive root growth scenarios.
In practice: Specifying TRC membranes for green roofs, sedum roofs, or any living roof application carries the confidence of triple-certified root resistance. No additional root barrier is required.
ISO 14025 — Environmental Product Declaration
TRC membrane production is covered by an ISO 14025 Environmental Product Declaration (EPD). This is an independently verified, third-party certified document detailing the full environmental impact of the product across its lifecycle. Data covered includes carbon footprint, energy consumption, water use and waste generation.
In practice: Contractors and specifiers working to BREEAM, LEED, or other green building certification frameworks can use the EPD to demonstrate sustainable material selection. The EPD is available on request.
ATG 3236E — Belgian Technical Approval
Following rigorous testing and audit by UBAtc (the Belgian Union for Technical Approval in Construction), TRC membranes received ATG 3236E Technical Approval — a construction industry certification confirming durability, reliability, and compliance with the technical requirements for roof waterproofing systems.
In practice: The ATG approval is recognised across European construction specification and procurement. It provides independent technical validation beyond CE marking for projects requiring additional assurance.
KOMO® Productcertificaat
The KOMO® productcertificaat is a quality certification mark administered by SGS Netherlands and widely recognised across the Dutch and broader European construction industry. Achieving KOMO® certification requires in-depth product testing and ongoing quality control audits.
In practice: KOMO® certification provides independent quality assurance for merchants and specifiers operating within European supply chains, confirming the product meets rigorous construction quality standards.
EN 15804+A2:2019/AC:2021
This European standard provides the framework for developing Environmental Product Declarations (EPDs) for construction products. It ensures that environmental performance data is calculated, reported, and independently verified in a consistent and comparable way across the EU. The declaration covers the full lifecycle of the product.
In practice: Compliance with EN 15804 means the environmental data in the TRC EPD is credible, comparable with other certified products, and accepted for use in EU sustainability reporting frameworks.
ASTM D4637 — US EPDM Standard
ASTM D4637 is the American Society for Testing and Materials standard specification for EPDM rubber sheets used in single-ply roofing. Compliance demonstrates that TRC membranes meet the physical and performance requirements set by the global EPDM roofing industry’s founding standards body.
In practice: ASTM D4637 compliance demonstrates that TRC EPDM meets the original North American performance benchmark. The region where EPDM flat roofing was pioneered in the 1960s. An internationally recognised mark of quality.
Need technical information?
Whether you’re quoting for a project, responding to a tender or simply want to request a certification document, our team can help.
We can provide:
- RFull certification documentation and test reports
- RProduct data sheets for One Piece and Fleece Backed EPDM
- REnvironmental Product Declaration (EPD)
- RTechnical support for specification compliance
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