Business Details
Premium Sash Windows for Period & Modern Properties
Masterframe Windows is a specialist in crafting high-quality sash windows that combine traditional aesthetics with modern durability. With over three decades of experience, we have perfected the art of producing windows that replicate the elegance of timber while offering the advantages of contemporary materials. Our commitment to authenticity is evident in every detail, from patented Timberweld technology to conservation-approved designs. We work closely with homeowners, architects, and developers to deliver bespoke solutions tailored to period properties and new builds alike. Our products undergo rigorous testing, including BBA certification, to ensure longevity exceeding 30 years. Every window is backed by a 12-year guarantee and installed by our network of Master Installers, who are trained to NVQ standards.We maintain strict quality control throughout manufacturing and collaborate with independent bodies like the Glass and Glazing Federation to uphold industry-leading standards. Our dedication to innovation is demonstrated through partnerships such as the integration of FINEO vacuum-insulated glazing, which enhances thermal efficiency without compromising on style. By focusing exclusively on sash windows, we have developed unparalleled expertise in this niche, ensuring every product maintains the character of historic architecture while meeting modern performance requirements.
Services
Symphony Sash Windows
Harmony Sash Windows
Melody Sash Windows
FINEO Glazing
Timberweld Technology
London Sash & Frame
Conservation-Approved Windows
Colour-Matched Windows
Security-Enhanced Windows
Health-Focused Ventilation
Highlights and features
- We have over 30 years of specialist experience in sash window design and manufacturing.
- Our products are BBA-approved and independently tested for longevity exceeding 30 years.
- We pioneered Timberweld technology for authentic timber aesthetics with PVC-U durability.
- Our Master Installers are trained to NVQ standards and guarantee professional installations.
- We voluntarily engage external auditors like ISO and Secured by Design for quality assurance.
Associations and certifications
- British Board of Agrment (BBA)
- ISO 9001
- Secured by Design
- Glass and Glazing Federation
What people say
Excellent customer service
Secure, A-rated windows
Perfect timber match
Outstanding installation
Double guarantee reassurance
Services
Symphony Sash Windows
Symphony Sash Windows represent our flagship range, featuring patented Timberweld joints and super-slim 39mm mid-rails for unparalleled authenticity. Designed for conservation areas, they replicate Georgian and Victorian aesthetics while incorporating modern security and thermal efficiency. Each window undergoes rigorous testing to meet PAS24 standards and carries a 12-year guarantee.
Harmony Sash Windows
Harmony Sash Windows offer extensive customisation options, including optional slim mid-rails and continuous run-through horns. While maintaining traditional appearance, they integrate modern features like FINEO vacuum glazing for superior insulation. Ideal for homeowners seeking period authenticity with contemporary performance benefits.
Melody Sash Windows
Melody Sash Windows deliver exceptional value without compromising quality, sharing the same profiles as our premium ranges. They provide an affordable solution for property owners requiring authentic sash aesthetics combined with modern durability and energy efficiency standards.
FINEO Glazing
FINEO vacuum-insulated glazing combines 1.2U-value thermal performance with a slim 10mm profile, outperforming triple glazing. This technology maintains traditional window proportions while delivering modern energy efficiency and noise reduction benefits for both new builds and renovations.
Timberweld Technology
Timberweld creates authentic butt-jointed PVC-U frames that replicate traditional mortise-and-tenon timber joints. This patented system ensures watertight seals while maintaining period aesthetics, making our windows indistinguishable from genuine timber in both appearance and detailing.
Questions
What makes Masterframe Windows sash windows unique?
Our windows combine patented Timberweld technology with conservation-approved designs, replicating timber aesthetics while offering modern durability and energy efficiency.
Are Masterframe Windows windows suitable for conservation areas?
Yes, our windows are specifically designed to meet conservation requirements, featuring authentic detailing that often fools planning officers.
What guarantees do you offer?
We provide a 12-year product guarantee and installers offer workmanship warranties, with both components independently verified through quality audits.
How energy-efficient are your windows?
Our FINEO-glazed windows achieve 1.2U-values, exceeding building regulations while maintaining traditional window proportions and aesthetics.
How are installers selected?
Master Installers undergo rigorous vetting for technical competence, financial stability, and customer service track record before joining our network.
Can windows be colour-matched to existing decor?
We offer comprehensive colour-matching services using a two-part paint process that ensures long-lasting finish in any RAL or BS colour.
