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"Renewing our membership with Secured by Design makes complete sense"

Secured by Design, the official police security initiative, are pleased to announce the renewal of both Sternfenster Window Systems and Starglaze Windows and Conservatories. 

Established in 1974, Sternfenster is a family run business dedicated to delivering high quality products and excellent customer service to the trade and retail industry. As the first fabricator in the UK to acquire a seamless welder from Graf Synergy, Sternfenster has revolutionised the way uPVC windows and doors are produced. Sternfenster operates from an 80,000 square metre state-of-the-art factory, supplying windows and doors to installers, builders and homeowners across the UK. Every window and door goes through a rigorous manufacturing process, with only the very best leaving the factory in Lincoln.



You can find out more about Sternfenster Window Systems and their range of Secured by Design accredited products at:

Starglaze, sister company to Sternfenster, was also founded in 1974 and has since grown to manufacture their own double glazing, replacement windows and doors, offering a complete home improvement service throughout Lincolnshire, Nottinghamshire, Newark and the surrounding areas. Starglaze installers are fully insured and have years of experience, as well as holding qualifications in fenestration installation.


Find out more about Starglaze Windows and Conservatories, including their range of accredited products, at

Nathan Court, Sales and Marketing Director of Sternfenster Window Systems, commented: “Renewing our membership with Secured by Design makes complete sense in a market place that requires we demonstrate professionalism and provide peace of mind to both trade customers and home owners alike.”

Doug Skins, Secured by Design, said: “I’m delighted that Sternfenster and Starglaze have renewed their memberships with Secured by Design. They are long standing members and have a wide range of high-quality doorsets and windows which have achieved Police Preferred Specification.  I look forward to our continued working relationship with both companies over the coming years”.

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