When having windows and doors replaced, homeowners MUST comply with current thermal performance standards and ensure that they get a certificate of compliance from FENSA or from Local Authority Building Control.

FENSA currently works with over 9,000 Registered Businesses throughout England and Wales.

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 recognised by consumers, all Local Authorities, industry and Government.

Glaziers include windows, doors, porches and conservatories.

Todays Upvc sash windows have all the elegance of yesterday's  wooden sash windows.

The sash window has been a feature of British housing for several centuries.

This is the most highly popular material for windows and doors today