At CBP, we are pleased to offer the Masterframe Sash Window collection within our new and extended showroom. Manufactured exclusively by Masterframe and professionally installed by CBP, the Masteframe Bygone range combines traditional aesthetics with advanced engineering. These are sash windows designed to replicate original timber with remarkable accuracy, while delivering the insulation, security and longevity expected in modern doors and windows today.
Whether you are renovating a period property, restoring a listed home, or designing a new build that needs to sit comfortably within its surroundings, the choice of sash windows matters. Proportion, detailing, glazing bars and horn design all influence whether the finished result looks authentic or compromised.
The Masterframe Collection – Three Distinct Options
The Masterframe Bygone Collection is available in three carefully developed styles: Symphony, Harmony and Melody. Each offers a different balance of detailing, performance and budget, while maintaining the same core design principles and frame profiles.
Bygone Symphony
Symphony represents the most exacting level of detail within the range. Featuring patented Timberweld® butt-jointed construction, a super slim 39mm meeting rail and a deep timber-style cill, Symphony sash windows are virtually indistinguishable from traditional timber.
Now available with FINEO vacuum insulated glazing, Symphony can achieve U-values down to 1.2 W/m²K, making it suitable for homeowners who want strong thermal performance without compromising on period authenticity.
Key features include:
• Super slim 39mm meeting rail
• Integral 99mm slim mullion
• Thin 18mm sealed units
• Continuous run-through horns
• Authentic Georgian bar detailing
• Fully steel reinforced sashes
• Exclusive stainless steel Bygone clawed cam catches
• Secured by Design compliance
This is often the preferred choice for conservation areas and high-specification period restorations.
Bygone Harmony
Harmony offers the same Timberweld® construction and continuous sash horns as Symphony, with a focus on delivering traditional styling. A 39mm slim meeting rail is available as an option, allowing you to maintain authentic proportions where required.
Featuring 24mm sealed units filled with Argon gas, Harmony provides strong thermal performance while retaining the appearance of a classic vertical sliding sash.
Key features include:
• 24mm sealed units with Argon gas
• Continuous run-through horns
• Deep bottom rail
• Authentic Georgian bars
• Patented Timberweld® construction
Harmony is well suited to period-inspired new builds or sympathetic upgrades in established neighbourhoods.
Bygone Melody
Melody delivers the same frame and sash profiles as the other ranges, making it visually consistent, while offering outstanding value. With a textured woodgrain foil finish and mitred corner joints, it provides a convincing traditional aesthetic at a more accessible price point.
Key features include:
• 24mm sealed units with Argon gas
• Mitred corner joints in woodgrain foil
• Continuous run-through horns
• Deep bottom rail
• Authentic Georgian bars
Melody is often chosen for larger renovation projects or heritage-style developments where maintaining consistent visual character is important.
Timberweld® Technology – Why It Matters
A defining feature of the Masterframe Sasj Window Collection is the patented Timberweld® technology. Unlike conventional welded PVC-U joints, Timberweld® replicates the appearance of traditional timber butt joints while maintaining completely sealed corners.
This provides:
• Fully sealed joints to prevent water and draught ingress
• Reduced maintenance compared with timber
• A convincing timber appearance
• Long-term durability in exposed conditions
For homeowners, it means achieving traditional detailing without the ongoing upkeep associated with painted timber sash windows.
Here is our table showing all the features of the Masterframe Sash Window Collection, at-a-glance
Designed for Period Homes and Modern Standards
Bygone sash windows are designed to complement Georgian, Victorian and Edwardian architecture, as well as contemporary developments that require traditional styling. With deep bottom rails, slim meeting rails and accurate horn detailing, the proportions remain faithful to historic design.
Colour options include a wide selection of finishes, including Farrow and Ball and RAL colours, allowing you to tailor the appearance precisely to your home. Within our Corsham showroom, you can explore an extensive collection of colour samples, ironmongery options and glazing bar configurations to personalise your windows in detail.
Security and performance are equally important. Fully steel reinforced sashes, exclusive stainless steel cam catches and Secured by Design compliance provide reassurance. Thin sealed units with Argon or Krypton gas support strong thermal efficiency, helping meet modern building regulations while preserving traditional aesthetics.
Explore your new Masterframe Sash Window at the CBP Showroom
Our extended CBP showroom in Corsham now features the Masterframe Sash Window Collection, alongside a substantial display of colour samples, accessory options and specification examples. You can compare the Symphony, Harmony and Melody ranges in person and review detailing closely before making a decision.
Whether you are restoring a period property, working within a conservation area, or building a new home that demands authentic character, Bygone sash windows offer a carefully engineered solution that balances heritage design with modern performance.
Visit our showroom to explore the collection and discuss your project in detail with our team.