Business Details
50+ Years
experience
Your Trusted Double Glazing Experts in Epsom
Marathon Windows, established in 1975, is a family-owned business specialising in high-quality uPVC windows, doors, conservatories, and roofline products. With over 40 years of experience serving Epsom, Surrey, London, and the South East, we combine advanced engineering with craftsmanship to deliver secure, energy-efficient solutions. Our products, sourced from leading manufacturers like Origin and Eurocell, meet rigorous standards through accreditations including FENSA, Secured by Design, and BBA certification.We prioritise customer satisfaction with a no-pressure sales approach, in-house installation teams, and a 10-year guarantee on all products. Our showroom in Epsom provides expert consultations, while our online quoting tool offers transparent pricing. Recognised by Which? Trusted Traders, we ensure reliability, compliance, and lasting value for homeowners seeking to enhance their properties' aesthetics, security, and thermal efficiency.
Services
uPVC Windows
Composite Doors
Conservatories
Roofline Products
Bi-Fold Doors
Patio Doors
French Doors
Stable Doors
Plantation Shutters
Roof Lanterns
Details
- Year established: 1975
Highlights and features
- Over 40 years of experience in double glazing installation.
- FENSA accredited for compliance and quality assurance.
- Which? Trusted Traders endorsement for reliability.
- BBA-certified products ensuring durability and performance.
- 10-year guarantee on all windows, doors, and conservatories.
Associations and certifications
- FENSA
- Secured by Design
- Which? Trusted Traders
- BBA
- Independent Warranty Association (IWA)
What people say
Refreshing to have a workman so happy in his work
Professional assistance
Extremely pleased
Good standard of workmanship
Services
uPVC Windows
Our A-rated uPVC windows feature multi-chambered profiles for superior thermal efficiency, reducing energy bills and maintaining comfort. BBA-certified with advanced security locks, they offer durability and low maintenance. Available in casement, tilt-and-turn, and sash styles, tailored to match property aesthetics while meeting modern building regulations.
Composite Doors
Engineered for strength and insulation, our composite doors combine reinforced frames with high-security locking systems. Customisable in finishes and colours, they resist weathering and intrusions. Ideal for enhancing kerb appeal and home protection, backed by a 10-year guarantee against warping or discolouration.
Conservatories
Tailored uPVC conservatories maximise natural light and space with thermally efficient glazing and weatherproof materials. Styles include Victorian, Edwardian, and lean-to designs, adaptable to period or modern homes. Includes optional dwarf walls, decorative crestings, and self-cleaning glass for year-round usability and aesthetic appeal.
Roofline Products
Durable uPVC roofline systems, including soffits, fascias, and guttering, provide long-lasting protection against weather damage. Designed for low maintenance and enhanced insulation, they improve roof durability while maintaining a clean, modern exterior appearance compatible with existing uPVC installations.
Roof Lanterns
uPVC roof lanterns transform flat roofs with sleek, self-cleaning glass and thermally efficient frames. Available in various sizes and colour options, they enhance light ingress and room aesthetics. Achieve U-values as low as 1.0 for energy savings, with a 10-year guarantee ensuring structural integrity and performance.
Questions
What areas do Marathon Windowss serve?
We cover Epsom, Surrey, London, and the South East, including Croydon, Coulsdon, Crawley, and surrounding regions.
Are your products energy efficient?
Yes, our A-rated uPVC windows and doors feature multi-chambered profiles and advanced glazing for optimal thermal efficiency.
Do you offer guarantees?
All products come with a 10-year guarantee against warping, cracking, or discolouration, plus deposit protection via IWA.
Can I get a free quote?
Yes, use our online quoting tool or contact us directly for a free, no-obligation double glazing price estimate.
Are you FENSA accredited?
Yes, we are FENSA registered, ensuring compliance with building regulations and quality standards for double glazing.
What styles of conservatories do you offer?
We provide Victorian, Edwardian, lean-to, P-shaped, and T-shaped conservatories, tailored to your property's design.
