Clayton Glass is the North of England’s largest Independent IGU supplier and the UK’s leading Conservatory Roof Glass & Compo ... site Door Glass Manufacturer. Clayton Glass Ltd is an independent sealed-unit manufacturer. We specialise in insulating glass units, conservatory roof glass and composite door units. Based in County Durham we supply over 20,000 products every week, delivering nationwide from Dunfermline to Hampshire, Humberside to Lancashire. Across our four factories, and over 300,000 square feet of manufacturing space we have invested in state of the art equipment in recent years, boasting 10 cutting centres, 3 toughening plants, 9 IG lines, and argon gas capabilities. What separates us from others in our industry is something we like to call 'The Clayton Difference', this is the mantra that Clayton Glass lives by and extends throughout the company. The Clayton Difference means you, the customer get to experience the strength of one of the UK's largest IGU manufacturers but with the care and attention, and crucially the service, of a family-run business. read more