Our Certifications and Memberships

The Glass and Glazing Federation

The GGF exists to promote best practice and helps to sets high technical standards. The federation is recognised by the UK government; it plays a large part in setting the new standards the control the way our buildings are constructed.
They are an invaluable source of technical information for us, and gives us added confidence that the products we supply are correct for your project.
Our certificate of membership can be viewed here.
GGFi certificate can be viewed here.


A leading Danish manufacturer, providing Scandinavian style windows with a flush exterior, Rationel are a very common request.
Whether you are in need of a modern or traditional solution, Rationel will most likely have a suitable answer.
Our distributor certificate can be viewed here.


Another premium quality Danish manufacturer, STM stand out in terms of finishing quality. Their timber paint finish goes beyond industry standard, and they guarantee the use of knot-free timber heartwood.
Not only do they offer timber-only and composite windows, they can also provide an oak solution for a truly traditional product.
Our distributor certificate can be found here.


If you require a bespoke timber window with that little bit extra, then Vrogum will be one of our main recommendations.
They can provide a timber product in a wide range of shapes and sizes. And are the only people we will recommend for timber sliding sashes.
Vrogum’s Svarre division offers something truly unique. For an ultra-modern building, look no further than their windows with a flush all-glass exterior.
Click here to view our distributor certificate.