Business Details
Trusted Double Glazing & Window Installers in Sidcup
We are a family-run business established in Sidcup, dedicated to providing high-quality double glazing solutions across Kent and London. With decades of experience in the home improvement industry, our team specialises in supplying and installing energy-efficient windows, doors, conservatories, and extensions. All our products meet British Standards, featuring A-rated energy efficiency and a 10-year guarantee for complete customer confidence. As Which? Trusted Traders and FENSA-registered professionals, we prioritise quality craftsmanship, sustainable materials, and a no-pressure sales approach.Our showroom in Sidcup offers personalised consultations, while our expert installation teams ensure minimal disruption and maximum satisfaction. We serve Blackfen, Dartford, Bexleyheath, Chislehurst, Bromley, and surrounding areas, combining traditional values with modern innovation to enhance home comfort and value.
Services
Double Glazing
uPVC Windows
Composite Doors
Conservatory Roofs
House Extensions
Highlights and features
- Family-run business with decades of local experience
- Which? Trusted Traders and FENSA-accredited professionals
- 10-year guarantee on A-rated energy-efficient windows
- Free consultations and showroom in central Sidcup
- Environmentally sustainable materials and installation practices
Associations and certifications
- Which? Trusted Traders
- FENSA
What people say
Excellent customer service
Professional and friendly team
Quick and efficient installation
Highly recommend
Delighted with results
Services
Double Glazing
Our double glazing solutions enhance thermal efficiency and security for Kent and London properties. Featuring A-rated uPVC and aluminium frames with 10-year guarantees, installations reduce energy bills while meeting British Standards. Expert teams ensure precise fitting with minimal disruption.
Composite Doors
Durable composite doors combine modern security with customisable aesthetics. Available in multiple styles and colours, these doors improve home insulation and property value. Professional fitting ensures optimal performance and weatherproofing for Sidcup and Kent residences.
Conservatory Roofs
Solid and tiled conservatory roofs transform outdated spaces into year-round living areas. Our thermally efficient solutions include aluminium roof lanterns and roofline upgrades, all installed by certified technicians to enhance comfort and energy ratings.
House Extensions
From loft conversions to full extensions, we create functional living spaces tailored to family needs. Projects follow strict building regulations with sustainable materials, adding practical value to properties across Kent and London.
Window Replacements
Modern casement, sash, and tilt-and-turn windows improve property aesthetics and efficiency. Available in traditional and contemporary designs, replacements feature low-maintenance materials and expert installation for lasting performance in residential and heritage settings.
Questions
What services does Affix Windows offer?
We supply and install double glazing, uPVC and aluminium windows, composite doors, conservatories, extensions, and roof replacements across Kent and London.
Are your products energy efficient?
Yes, our A-rated windows and doors meet strict energy efficiency standards, helping reduce heating costs and improve home comfort.
Do you provide guarantees?
All double glazing installations come with a 10-year guarantee covering materials and workmanship for complete peace of mind.
Which areas do you cover?
We serve Sidcup, Blackfen, Dartford, Bexleyheath, Chislehurst, Bromley, Gillingham, Maidstone, and surrounding London and Kent areas.
Can I get a free quote?
Yes, visit our Sidcup showroom or use our online quote tool for a bespoke, no-obligation price estimate for your project.
Are financing options available?
We offer flexible finance through FCA-regulated providers, allowing you to spread costs of home improvements with manageable monthly payments.
Reviews (3)
James Martin
Jun 01, 2018
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Had 2 front bay windows and side windows done. Very good sales and installation staff. Highly recommended. Whole house brightened up and looks great!
Michael Blaby
Nov 27, 2017
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We arevery satisfied with the service we received from Affix Windows. They installed new double glazed windows and doors in our new house in September.
Karen Pratt
Jul 15, 2017
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Affix Windows produce good quality windows at a reasonable price. More importantly, their customer service is excellent and in my case they met my very tight deadline efficiently and with good humour. Snags were quickly remedied. Highly recommended
