Welcome to GIS Windows

Double Glazing Suppliers North London

“We have a reputation to protect and we pride ourselves on getting the job done professionally”. We believe our action are one of an environmentally friendly company which recycles or reuses waste wherever possible.

Double Glazing Enfield

At GIS Windows we are rightly proud to be double glazing suppliers and manufacturers. With 34 years of experience, we have strived to supply the highest quality double-glazed windows, doors and conservatories with the best customer service. Our team has built up an enviable reputation for honest, factual and friendly service, which extends far beyond the sales room  Unlike many double glazing suppliers and windows manufacturers all of our products are produced in the groups own factory ensuring total control of the process.

Windows Manufacturers Hertfordshire

We provide innovative designs that are functional and pleasing to the eye. Every product from our side passes through a stringent tests before being used in any house. This is the main reason for our successful business as windows manufacturers.  We are also well establishes as Double glazing suppliers. We have revolutionized the windows in Luton and Enfield area. We also assist in installing Conservatories. The space in a conservatory can be used for multiple purposes depending on the individual.

Contact Information

Unit 21, Sundon Industrial Estate, Dencora Way, Luton, Bedfordshire, LU3 3HP
Tel: 01582 494222

Fax: 01582 494145


64 Chaseside, Enfield, Middlesex, EN2 6NJ
Tel: 0208 364 5552

Fax: 0208 364 6790

Email: sales@giswindows.co.uk


  • Delighted with the windows. Perfect. The fitters, Liam and Gary Thompson were brilliant. Efficient and polite, they took every care inside and outside my property. Well done GIS for employing two very hard working gentleman.

    Mrs Sullivan – Enfield,
  • I am just writing to you to say a huge thank you to GIS Windows. As well as having the windows done, they have just finished doing our Soffits, facias and guttering and in both cases we are delighted with the results; especially the windows. At all times in our

    John Morton & Kate Grant – Weybridge,
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