Leading Manufacturer, Supplier & Installer of Bespoke Replacement UPVC Doors and Aluminium Doors in Berkshire, Buckinghamshire and Oxfordshire.

Call us today on freephone

08000 825 825

FENSA Registered Member

Hazlemere Window Company Ltd is a long standing member of FENSA (Registered No. 10589) - the leading body providing consumer protection in the double glazing industry for replacement doors and windows.

Who is FENSA?

FENSA stands for the Fenestration Self-Assessment Scheme. Following prompting from the Government, FENSA was set up by the Glass and Glazing Federation (GGF) and other industry bodies at the beginning of the century in response to Building Regulations for double glazing companies in England and Wales.

When replacing doors and windows, homeowners must comply with the latest thermal performance standards and ensure they get the appropriate certificate from FENSA or Local Authority Building Control. FENSA enables companies that install replacement double glazed doors and windows to self-certify compliance under these Building Regulations without the need for a separate assessment from Building Control.


An independent report commissioned by the Government found FENSA to be the most successful of all competent person schemes to date in the UK, across all industries. FENSA is the leading brand in the fenestration industry trusted by consumers, all Local Authorities, industry and Government.

Why you will get greater protection with a FENSA registered company

  • Regular assessment of FENSA UK double glazing companies by an 'independent inspection body'
  • Ten year insurance backed guarantee available to the homeowner on every installation
  • FENSA Building Regulations certificate dispatched to the property owner for every registered installation as proof of compliance
  • Your home will be compliant with Building Regulations without the added cost and time of arranging assessment by Building Control