Affix Windows

Affix Windows: double glazing in Sidcup and Kent

Affix Windows is a family-run company based in Sidcup that supplies and installs double glazed windows, doors and conservatories. Its stated service area covers locations in Kent and the Greater London area such as Blackfen, Sidcup, Dartford, Welling, Bexleyheath, Chislehurst, Bromley, Gillingham, Croydon and Maidstone. The company states that its profiles comply with British Standards and that it uses leading industry suppliers, including Profile 22 and The Residence Collection.

Window range

The window range includes uPVC, aluminium and timber models, with types such as tilt & turn windows, bay & bow windows, casement windows, flush casement windows, French casement windows and sliding sash windows. It also offers the Residence², Residence 7 and Residence 9 ranges. The company highlights that its A-rated windows come with a ten-year guarantee and can achieve certain energy efficiency values.

Doors and entrances

The exterior door range includes uPVC, aluminium and composite options. Details are provided for uPVC doors, uPVC patio doors, uPVC French doors, aluminium doors, aluminium patio doors, aluminium bi-fold doors, composite doors, composite stable doors and Solidor doors. The company also offers a free online Solidor door designer so customers can design their own composite door, choosing styles, colours, glass and components.

Conservatories, roofs and roofline

For larger projects, Affix Windows carries out conservatory refurbishments, solid and tiled conservatory roofs, and aluminium roof lanterns. It also covers roofline and replacement double glazing, as well as glass splashbacks.

Showroom and customer service

The company has a showroom in Sidcup, on Blackfen Road, where customers can see the products and receive advice from the team. Affix Windows presents itself as a family-run business with decades of experience in double glazing and home improvement, operating without hard sales techniques. Its accreditations include being a member of Which? Trusted Traders and being FENSA registered. The company offers free, bespoke quotes and has finance options to spread the cost of projects.

Products and complementary services

In addition to windows, doors and conservatories, the range includes house extensions, loft conversions, smart products and replacement glazing solutions. The company publishes informative content on topics such as Residence Collection windows for period properties, Ultion Nuki smart locks and Kubu sensors, and the 2026 fire door regulations.

Location and contact

Blackfen Road, Kent · Phone: 020 8316 0197 · Email: info@affixwindows.co.uk