Accreditations & Certifications

FlexiProof EPDM membranes are produced by TRC (Techno Rubber Company) in a state-of-the-art, multi-million-pound manufacturing facility that is ISO 9001 certified and fully CE marked. (TRC EPDM membranes are available across Europe under different brand names.)

In 2016, FlexiProof proudly partnered with TRC, achieving a significant milestone as the first company to bring TRC’s EPDM membranes to the UK market. Today, these premium membranes are supplied to roofers nationwide under the FlexiProof brand name, fully authorised by TRC and backed by FlexiProof’s robust logistics and dedicated support. While TRC membranes are now distributed across Europe under various brand names, FlexiProof remains the original and trusted TRC-authorised brand in the UK.

The FlexiProof EPDM flat roof system has received several globally-recognised accreditations and certifications. This means the FlexiProof EPDM flat roof system is an excellent choice for roofing professionals looking to deliver top-quality roofing solutions that meet UK, European, and US standards for quality, performance, sustainability, and more.

Contact us with enquiries regarding our product testing, accreditations, and certifications.

The EPDM Flat Roof System Certified Worldwide and Trusted Nationwide

ISO 9001:2008 Certification

Produced in a facility certified to the ISO 9001:2008 standard, FlexiProof One Piece and Fleece Backed EPDM membranes meet international quality management requirements, ensuring consistent product quality and customer satisfaction.

ISO 9001 is an international standard that specifies requirements for a quality management system (QMS). Organisations use this standard to demonstrate their ability to consistently provide products and services that meet customer and regulatory requirements, and to demonstrate continuous improvement.

Associated Products: One Piece | Fleece Backed

ISO 14025 Environmental Product Declaration (EPD)

FlexiProof One Piece and Fleece Backed EPDM membranes are produced to an ISO 14025 Environmental Product Declaration (EPD). Membrane production is transparent (carbon footprint, energy consumption, water use, and more), credible, and continuously improving. Ensuring merchants and roofers benefit from informed decision-making, green building certification eligibility, and compliance with sustainable standards.

ISO 14025 is an international standard developed by the International Organisation for Standardisation (ISO) that provides guidelines for environmental labelling and declarations. It focuses on Type III Environmental Declarations, known as Environmental Product Declarations (EPDs). These declarations provide detailed, quantifiable information about the environmental impacts of a product throughout its lifecycle.

Associated Products: One Piece | Fleece Backed

EN 15804+A2:2019/AC:2021

FlexiProof One Piece and Fleece Backed EPDM membranes are manufactured in compliance with EN 15804+A2:2019/AC:2021, to ensure both product quality and roofer experience advantages. This European standard ensures that the Environmental Product Declarations (EPDs) provide accurate and transparent environmental performance data to deliver reliable sustainability and compliance benefits.

EN 15804+A2:2019/AC:2021 is a European standard that provides the framework for developing Environmental Product Declarations (EPDs) for construction products, similar to ISO 14025. It ensures consistent and comparable environmental data related to the lifecycle of construction products, allowing industry stakeholders to assess the environmental performance of buildings and other infrastructure. This standard is significant within the European Union’s efforts to promote sustainability in the construction sector.

Associated Products: One Piece | Fleece Backed

BBA FPC (Factory Production Control) Certification

The BBA provides certification for FPC (Factory Production Control) to support UKCA, UKNI Marking, and CE Marking. FlexiProof One Piece and Fleece Backed EPDM membranes are produced in a facility certified to these rigorous standards.

A BBA UK Certificate of Conformity of the Factory Production Control is a document issued by the British Board of Agrément (BBA) that confirms a manufacturer’s production process meets the required standards for consistency and quality. This certificate is particularly relevant to construction products under the Construction Products Regulation (CPR) in the UK and EU.

Associated Products: One Piece | Fleece Backed

Fire Resistant (B Roof T4 Rated)

FlexiProof One Piece and Fleece Backed EPDM membranes pass rigorous tests to UK and EU Standard B Roof (T4) – demonstrating high resistance to ignition and flame spread, and ensuring enhanced safety in severe fire conditions.

A B Roof (T4) accreditation refers to a fire-resistance rating for roofing materials. The B Roof classification is part of the European classification system known as EN 13501-5, which is a part of the broader EN 13501 series. This series outlines fire classification standards for construction products and building elements in Europe.

Associated Products: One Piece | Fleece Backed

ATG 3236E Technical Approval

Following rigorous audits and testing by the UBAtc (The Belgian Union for Technical Approval in Construction), TRC membranes received the ATG 3236E Technical Approval – ensuring that FlexiProof branded membranes produced by TRC are durable, reliable, and compliant with industry standards.

ATG Technical Approval refers to a certification process associated with ensuring the safety, reliability, and compliance of products, systems, or components, typically in industries like construction, aerospace, telecommunications, or manufacturing. This approval process involves a series of evaluations and tests conducted by authorised bodies or experts to confirm that the product or system meets the necessary technical standards and regulations.

Associated Products: One Piece | Fleece Backed

CE Marked

FlexiProof One Piece and Fleece Backed membranes are CE Marked according to the EU Standard EN 13956:2012. This signifies adherence to strict European health, safety, and environmental standards – guaranteeing exceptional performance and durability.

The CE Mark (Conformité Européenne) is a certification that indicates a product meets the European Union’s safety, health, and environmental protection requirements. For EPDM membrane extrusion facilities, obtaining a CE Mark can be essential for gaining access to the European market. It assures customers and regulatory bodies that the product meets high safety and quality standards, aligning with the EU’s emphasis on consumer protection and environmental sustainability.

Associated Products: One Piece | Fleece Backed

KOMO® productcertificaat

TRC membranes received the trusted KOMO® productcertificaat through SGS Netherlands following in-depth tests and quality control audits. This ensures roofers that FlexiProof One Piece EPDM membranes produced by TRC are high-quality products that combine durability, regulatory compliance, and ease of installation.

A KOMO® productcertificaat is a certification mark in the Netherlands that indicates a product complies with specific quality and safety standards. It is part of the KOMO certification system, which is widely recognised in the Dutch construction industry as a sign of reliability and quality.

Associated Products: One Piece

Cahier des Charges

FlexiProof One Piece EPDM membranes are manufactured by TRC in a facility with an up-to-date Cahier des Charges document. This document details the technical specifications of waterproofing systems for flat roofs and ensures that all steps – from raw material selection to flat roof application – meet the required standards for effective and long-lasting waterproofing.

A Cahier des Charges is a French term that translates to ‘specifications document’. It is a detailed document outlining the requirements, criteria, and constraints for a project, product, or service. The Cahier des Charges serves as a formal contract between the client (the one requesting the work) and the provider (the one executing the work) to ensure both parties understand the expectations and deliverables.

Associated Products: One Piece

ASTM D4637 Compliant

FlexiProof membranes produced by TRC comply with ASTM D4637 – meeting the US Standard Specification for EPDM sheets and demonstrating their suitability for single-ply roofing applications.

ASTM D4637 is a standard specification developed by ASTM International (formerly the American Society for Testing and Materials). It specifically addresses the requirements for ethylene propylene diene monomer (EPDM) rubber sheets used in single-ply roofing membranes.

Associated Products: One Piece

Root Penetration Resistance

Certified to US and EU standards, including ASTM D8014, BS EN 13948, and ANSI/SPRI VR-1, FlexiProof One Piece and Fleece Backed membranes effectively prevent root damage in green roofing systems – ensuring lasting waterproof protection.

Investigate Resistance to Root Penetration for a roofing and/or waterproofing material in general accordance with ASTM D8014: Standard Guide for Selection of Membrane Used in Vegetative Roofing Systems; BS EN 13948: Flexible Sheets for Waterproofing. Bitumen, Plastic, and Rubber Sheets for Roof Waterproofing. Determination of Resistance to Root Penetration and ANSI/SPRI VR-1: Procedure for Investigating Resistance to Root Penetration on Vegetative Roofs.

Associated Products: One Piece | Fleece Backed