- TriRoof Roofing Systems
TriRoof MULTIFLEX GRP ROOFING SYSTEM
The TriRoof MultiFlex GRP Roofing System stands out as a leading choice in liquid roof systems and flat roof systems UK. This innovative fibreglass roofing system provides a comprehensive solution for flat roof repair and flat roof overlay applications, ensuring durability and performance across a variety of surfaces. The system is cold applied and compatible with existing substrates such as Asphalt, Felt, Timber, GRP roofing and Concrete, making it one of the most versatile liquid roofing systems available.
With the MultiFlex system each substrate is prepared with a specialised Primer, followed by a layer of matting and finished with our TriRoof Modified Polyester Resin – a high performance glass fiber roof topcoat in Dark Grey. Simplifying the process, a single primer works for 90% of substrates, streamlining installation while maintaining quality.
Both the Primer and Topcoat cure using a BPO Hardener. This roofing fibreglass system meets strict quality assurance standards, making it a dependable solution for both new and existing flat roofing products.
The TriRoof MultiFlex System has achieved the highest fire performance classification available, earning BRoof (T4) certification and setting the benchmark for roofing fire safety. This top-tier rating confirms that the system resists fire penetration for up to 60 minutes, even under extreme exposure. Following testing, the system demonstrated exceptional control, with flames self‑extinguishing in under five minutes and flame spread limited to less than 0.38 metres, delivering outstanding protection and long‑term peace of mind.
FLEX Roofing SYSTEM CASE STUDY
RBK CONSTRUCTION
FUTURE-PROOFs K LEISURE ROOF WITH TRIROOF MULTIFLEX
RBK Construction’s expert handling of a live, high-traffic site, combined with their attention to detail and commitment to quality, ensured that every advantage of FLEX was fully realised.
triroof MULTIFLEX Guarantees & registration
Key Benefits of TriRoof MultiFlex GRP Roofing System
✓ Can be applied to existing roofs (no need to strip back)
✓ Cold applied system
✓ Backed by a 20 year material guarantee
✓ Suitable for new and existing roofs
✓ Suitable for application in temperatures as low as 1°C
✓ Only one Primer for 90% of substrates
✓ Walk on times 30-60 minutes
✓ BRoof (T4) certified: The highest fire rating, delivering maximum roof fire resistance and peace of mind.
DOWNLOADS

From History to High Performance: How ECMS and Tricel Revived a WWII-Era Commercial Flat Roof at IWM Duxford
Tricel and ECMS restored a WWII-era commercial flat roof at IWM Duxford using TriRoof HPX System, delivered ahead of schedule with a 20-year guarantee.

BRoof(t4) Testing & Certification for Liquid Roofing Systems: What Contractors and Customers Need to Know
Learn how BRoof(t4) certification ensures fire safety and compliance for liquid roofing systems, benefiting both contractors and end users.

Guide to Choosing the Right Roof Trims
Boost your flat roof’s performance and appearance with the perfect GRP trims. Get expert advice and top product tips in our complete guide.

Roofing Resin Subcategories Explained
Roofing resins like Original GRP, HPX, MultiFlex, Polyurethane, and Acrylic offer unique benefits for residential and commercial properties. Learn about the advantages, applications, and features of each resin type to choose the best option for your roofing needs.