Metal Frame EWI External Wall Insulation (Insulated Render) can easily be applied to Metal framed buildings. GPD Contracts regularly install EWI to projects that involve Metal framed construction in Worcester, Birmingham, Manchester and London. Essentially the Insulated Render system is adhered & fixed to a suitable sheathing board. Non combustible rating is comfortably achieved with Mineral Wool (Rockwool) Insulation with a class O rated sheathing board, such as Magnesium oxide board. There are a wide range of finishes available including 'through colour' silicone & acrylic, scratch render 'through colour' finish, brick effect, brick slip & aggregate dash - all in a wide range of colours.

EWI systems that are available from our suppliers come with a British Board of Aggrement certificate and a 10 year warranty.

SFS Framing & Cement Particle Board

Metal framed buildings generally achieve a high level of accuracy. The primary metal frame will receive a secondary steel frame (SFS) which receives a sheathing board, usually a cement particle board (CP board). EWI is then fitted directly.

A range of sheathing boards and insulants are available including a full Class O, non-flammable option.

Non-combustible EWI

GPD Contracts recently completed a non-combustible EWI installation at the new CSSB building within the new Liverpool University Hospital development. For more information on non-combustible EWI systems please feel free to get in touch.

All insulant options can be used on metal frame constructions. However, there is a non-combustible option when using 'Class O' rated cement particle carrier board with mineral wool insulation.

All Shapes & Sizes!

Curves are easily achieved with EWI systems, whether it be masonry, metal or timber frame constructions. The picture above shows the required 'notched base track' along with an example of a typical project.

The Insulation can naturally curve to most radius. In non-combustible specifications, Lamella mineral wool is required.

STO Turbo Fix

On large commercial fast track schemes, STO's Turbofix comes in to its own.

The speed of installation on metal frame projects is vastly improved, with the absence of time consuming self-drilling mechanical fasteners.

The Insulation within an EWI system is often mechanically fixed with a cementitious adhesive. However, as with all industries, manufacturers are striving for improvements to their systems. The fixing methods below from STO showcase this.


8th January 2020

Constructionline GOLD member

Specialist Render & EWI Contractors GPD Contracts ltd confirm Constructionline Gold level membership For Supply and installation of : Specialist […]
6th April 2018

Rendering – Health & Safety

GPD Contracts ltd recognise and embrace the importance of Good health & safety practice. A safe environment for our team […]
29th March 2018

Epsitec EWI system to a high spec development in Worcester

Wetherby Epsitec EWI system was provided to two new properties off London rd, Worcester. The Construction method was Metal frame […]
7th March 2018

EWI & Silicone Render at South Derbyshire & Burton College

A complete renovation of the external envelope was undertaken by Hazlemere Group in 2015. GPD were pleased to provide the […]
26th January 2018

Weber.therm EWI to Metal frame construction at BUPA – Edgbaston

We were delighted to supply 600 square metres of Weber EPS EWI system in 2017. The specification included Fire breaks […]
19th January 2018

EWI system installed to a modern glass office block in Manchester

EWI to a modern glass office block? The sleek modern Glass design mixed of Greengate in central Manchester included brilliant […]