Business Details
50+ Years
experience
Trusted Double Glazing Solutions in Epsom
Marathon Windows has been a trusted name in the double glazing industry since 1975, serving homeowners across Epsom, Surrey, and the South East. As a family-owned business, we specialise in supplying and installing high-quality uPVC windows, doors, conservatories, and roof lanterns designed to enhance both the aesthetics and energy efficiency of residential properties. Our commitment to excellence is underscored by our accreditations, including FENSA registration, Secured by Design approval, and membership of Which? Trusted Traders. With over four decades of experience, we combine traditional craftsmanship with modern technology to deliver durable, secure, and thermally efficient solutions tailored to individual client needs.Our in-house team of skilled professionals ensures every project is completed to the highest standards, supported by a 10-year guarantee on all products. We prioritise customer satisfaction through transparent communication, no-pressure sales, and a dedication to exceeding industry benchmarks, making us a preferred choice for home improvement projects of all scales.
Services
uPVC Windows
Composite Doors
Bi-Fold Doors
Conservatories
Roof Lanterns
Double Glazing
Replacement Windows
Aluminium Windows
Plantation Shutters
Roofline Improvements
Details
- Year established: 1975
Highlights and features
- We have over 40 years of experience in the double glazing industry.
- Our team consists of certified experts with extensive experience.
- We provide 10-year guarantees on all our products.
- We are accredited by BBA and BSI.
- We operate with a no-pressure sales approach.
Associations and certifications
- FENSA
- Secured by Design
- BBA
- BSI
- Independent Warranty Association (IWA)
What people say
Refreshing to have a workman so happy in his work
Very pleased with our new windows
Professional assistance from start to finish
No need to re-decorate after installation
Would definitely use again
Services
uPVC Windows
Our uPVC windows combine advanced engineering with sleek design to deliver superior thermal efficiency and security. Manufactured using 100% recycled materials, they feature multi-chambered profiles for insulation, A-energy ratings, and multi-point locking systems. Available in casement, tilt-and-turn, and sash styles, they are tailored to suit both traditional and modern properties while offering low maintenance and a 10-year guarantee.
Bi-Fold Doors
Our bi-fold doors offer seamless transitions between indoor and outdoor spaces with slim sightlines and high-security locking systems. Available in uPVC and aluminium, they provide thermal efficiency, low thresholds, and a choice of finishes. Designed for durability and ease of operation, they enhance natural light and are ideal for connecting homes to gardens or conservatories.
Conservatories
Bespoke uPVC conservatories are crafted to complement any property, from Victorian to lean-to styles. Featuring advanced glazing options, weatherproof materials, and high thermal efficiency, they create bright, versatile living spaces. Customisable with dwarf walls, decorative crestings, and energy-efficient glass, they add value and year-round usability to homes.
Roof Lanterns
Roof lanterns enhance flat roofs with natural light and architectural appeal. Constructed from uPVC with self-cleaning glass and U-values as low as 1.0, they offer thermal efficiency and durability. Available in multiple sizes and colour options, they include a 10-year guarantee and are designed to integrate seamlessly with existing windows and doors.
Roofline Improvements
Our uPVC roofline products, including fascias, soffits, and guttering, provide weatherproof protection and low-maintenance durability. Designed to resist fading and corrosion, they enhance a property's exterior with clean lines and a choice of styles. Installed with precision to ensure longevity, they complement double glazing installations and improve overall energy efficiency.
Questions
What areas do Marathon Windowss cover?
We serve Epsom, Surrey, London, and the South East, including Croydon, Coulsdon, and Crawley.
Are your products energy efficient?
Yes, all our windows, doors, and conservatories are A-rated for thermal efficiency.
Do you offer guarantees on your products?
We provide a 10-year guarantee on all installations, backed by Independent Warranty Association protection.
Can I get a quote online?
Yes, use our online calculator for instant, no-obligation quotes tailored to your project.
Are your doors secure?
Our doors feature high-security locking systems and are Secured by Design approved.
Do you offer bespoke conservatory designs?
Yes, we create custom conservatories to match your property's style and requirements.
