GIS Windows

At GIS Windows we're rightly pleased to be double glazing providers and manufacturers. With 28 years of knowledge, we currently have strived to provide the finest quality double-glazed windows, doors and conservatories with the finest client service. Our staff has set up an enviable reputation for honest, factual and friendly service, which extends far beyond the salesroom. Unlike many double glazing providers and manufacturers all of our products are produced in the groups own factory ensuring total control of the process.