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Sidey – pushing the boundaries of fenestration innovation

Sidey has been a pioneering force in the fenestration industry for more than 85 years and is firmly established as one of the UK’s market leaders in the manufacture, supply and installation of high-performance windows, doors, curtain walling, conservatories and offsite solutions.

As one of the largest and most established fenestration solution providers, Sidey pushes the boundaries of innovation, setting new benchmarks within the Newbuild, Commercial, Refurbishment and Offsite market sectors.

Raising the bar

Sidey’s mission is to persistently find ways to raise the bar when it comes to delivering the highest possible performance for customers, making sure that standards such as the Code for Sustainable Homes, EESSH, Retrofit for the Future, Fabric First and Passivhaus are easily met.

Operating from a 100,000ft2 site, Sidey is a strong, reliable, award-winning company, with experience in delivering contracts of varying size and complexity, while guaranteeing quality and best value.


Sidey’s comprehensive list of accreditations includes ISO9001-2015, ISO14001-2015, OHSAS 18001-2007, BS8213-4:2016, BS 7412/PAS 24:2016 for Windows and Doors, Energy Saving Kitemark, BS 8529/PAS 24:2016, Secured By Design, Constructionline, STA Accredited Members Standard, Investors In People, CHAS, SSIP/SMAS - Principle Contractor, NHBC Safemark, British Safety Council Member, Considerate Constructor, LHC/SPA Framework Supplier and a SFHA Member.

Sidey windows

Covering a range of styles, including casement, tilt & turn, fully reversible and vertical sliders, Sidey’s window range is available in both Solartherm® and SolarthermPlus® options.

The Solartherm® range of windows from Sidey has been developed to address the growing demand for energy efficient windows and can be manufactured to a U-value of 1.2W/m2K.

Sidey’s SolarthermPlus® windows can be manufactured with U-values of 0.7W/m2K. This remarkable performance is achieved using a standard 70mm outer frame depth, with ‘off the shelf’ glazing, hardware and other components.

Sidey doors

Sidey’s range of doors is also available in both Solartherm® and SolarthermPlus® options, with French doors, bi-folding and patio styles on offer, as well as residential, aluminium and composite.

Security and energy efficiency is crucial, so it’s important to choose a door which can be depended on. This is why Sidey offer a range of high security hardware for all Solartherm® doors, a Secured by Design option and a U-value of 1.2W/m2K.

Sidey’s SolarthermPlus® doors are designed to provide the highest standards of aesthetic appearance, energy efficiency, durability and security. The range offers a whole door U-value as low as 0.8W/m2K.

Sidey curtain walling

The Solartherm® Curtain Walling system from Sidey is primarily used in the Public Sector refurbishment and new build markets and has been designed to offer the widest versatility, combined with ease of installation.

Sidey KitFix® System

The Sidey KitFix® System was designed with offsite manufacturing in mind. This innovation enables fully glazed, fully finished windows and doors to be installed into timberframe and SIPs panels as part of the offsite production cycle, while having little effect on the stacking, transportation and erection of finished panels.

The system includes a wide range of clip-on cill solutions that enable cills over 200mm to be added after erection of the timber structure.

More information

To find out more about Sidey and their products, go to, email or call 0800 234 400.