New SFS Direct Fix EWI system offers reduced complexity and extended life

The Benx Group is proud to announce its latest KIWA-certified direct fix External Wall Insulation (EWI) system for framed structures (SFS).
The system, offered under Benx’s SPS Envirowall brand, is designed for both retrofitting medium-to-high rise buildings and new build sheathed, steel frame and masonry applications, where NHBC warranties are not a requirement (i.e. schools, hospitals, etc.).

The KIWA BDA certification is the latest addition to the group’s extensive portfolio of Agrement certifications, for its EWI systems, rain screen façade systems, and a comprehensive range of sheathing boards and accessories. The Direct Fix system uses non-combustible mineral wool insulation and has a range of finishes to suit performance and aesthetic requirements, with options for fully A1 non-combustible system finishes, as follows.

With a design life of 60 years, the system offers unparalleled durability performance for systems it its type. Its design also helps reduce complexity in the specification and installation processes.

Benx Head of Technical Services, Dave Sherlock, said, “Installing this system directly onto the sheathing board negates the complexity of accommodating a cavity, and as such can significantly simplify design and achieving the required fire performance. The installation process is relatively straightforward and there is no requirement for, or reliance on, cavity closers or fire breaks behind our A1-rated Mineral Wool Insulation”.

Application and design of the new approved system covers a variety of sheathing boards, including Y-Wall, our premium A-Rated Cement Particle Board which is suitable for use on projects over 18m in height.


A1 fire classification* (Enviromin mineral render finish)
A2-s1,d0 fire classification* (silicone render / flexible brick slip finish)
*Tested to BS EN 13501-1
Please note: in instances where a cavity façade system is required, our BBA / KIWA certified cavity systems can be used.

Find out more here.