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Which? is the largest and most recognised consumer body in the UK. It has been rigorously testing products and services and awarding “Best Buy” icons for over 50 years and its name has become synonymous with trust.

To be endorsed as a Which? Trusted Trader, SPS Timber Windows successfully passed a rigorous assessment, which not all companies do, so you can be confident that you are engaging the services of a reputable company you can trust.





SPS Timber Windows is a FENSA certified company (Registered No. 10193).

FENSA (the Fenestration Self-Assessment Scheme) is the leading body providing Building Regulations compliance for homeowners replacing windows and doors.
Our installations are registered with FENSA on completion and a certificate is issued.





SPS Timber Windows is a BFRC Authorised Installer.

The BFRC (British Fenestration Rating Council) is the UK’s national system for rating Energy Efficient Windows.

Installing BFRC rated energy efficient windows and/or energy efficient doors will help to reduce the cost of your energy bills as well as the carbon emissions from your home.

Our timber casement windows have been awarded an “A” rating for their thermal energy performance, exceeding Building Regulation Requirements.

‘C’ is the minimum to satisfy Building Regulations for windows and ‘E’ for doors (except in exceptional circumstances, which include historic properties and conservation areas).





SPS Timber Windows is a BWF (British Woodworking Federation) approved supplier. The British Woodworking Federation not only ensures that its members conform to a rigorous set of standards of workmanship, company stewardship and environmental disciplines but also offers guidance for customers who use, or specify, its members’ products and services.




SPS Timber Windows’ Insurance Backed Guarantee

SPS Timber Windows’ installed double-glazed windows and doors are issued with a comprehensive Insurance Backed guarantee.

Our windows and doors are designed to last and with the correct care and maintenance, an excellent condition can be maintained well beyond the guarantee period.


SPS Timber Windows’ Deposit Protection Insurance

SPS Timber Windows offers peace of mind with deposit protection insurance, which is underwritten by GGFi, the only insurance provider to be recommended by FENSA.


Our Guarantees