- Specialising in all aspects of Glazing from Contract to Domestic and providing a 24hr Emergency Boarding Service, we supply all types of glass and sealed units including Laminated, Toughened, Leaded, Patterned, Polycarbonate and Clear, as well as all aspects of Double Glazing covered to fit existing or new frames. Our comprehensive Joinery Service can supply top quality UPVC and Hardwood Doors ...www.davidsteelglazing.co.uk