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Who we are

At GSM Windows we have been providing superb quality in Double Glazing Windows, Doors and Conservatories for years and have gained an enviable reputation for quality, value for money and industry leading workmanship.Whether you need windows and doors for a new construction project or you are simply thinking about replacement windows for your home, we have the product to suit your needs.

Every product from GSM Windows carries our commitment to quality design, timeless beauty and skilled craftsmanship. Our windows and doors meet exact standards for energy efficiency and durability, as well as ease of installation, operation and maintenance.

Quality installations demand quality products. For our wide range of windows, doors, conservatories and Double Glazing, we only use the best materials, such as the very latest PVC-U profiles from REHAU, Europe’s leading profile manufacturer with over 40 years experience. REHAU systems are approved by the BBA and tested in accordance with BS6375

Part 1. REHAU also holds a BS7413 Kitemark licence, which incorporates BS5750

Part 2. All GSM Windows’ double glazing products are manufactured within BS5713 hermetically sealed flat double glazing units and are quality assessed against BS EN ISO 9002.