Itchen Glass & Glazing
Flush Sash Windows
Eco-friendly flush sash windows, installed throughout Southampton and the surrounding areas.
- Authentic period look
- Modern double-glazed performance
- Made to measure & fitted by our own team
Flush Sash Windows in Southampton & Hampshire
Flush sash windows from Itchen Glass & Glazing bring the timeless beauty of traditional timber frames to homes across Southampton and Hampshire. Sitting flush within the frame rather than proud of it, they recreate the timber-window look of period properties while giving you the performance and low maintenance of modern uPVC — built on Liniar’s Resurgence system for genuine period-property and conservation-area suitability.
Finished with authentic period-style hardware, our flush sash windows are made to measure and fitted by our own team.
What you get with Itchen
Authentic Period Look
Flush-fitted profile designed to echo traditional timber windows.
Modern Performance
Full double-glazed insulation and security behind a traditional face.
Low Maintenance
None of the upkeep that comes with real timber.
Made to Measure
Every window measured and fitted by our own team, not a standard size.
Liniar Systems
Liniar Approved Installer
Itchen Glass & Glazing is a Liniar Approved installer. Liniar profiles are designed, manufactured and tested at their own UK facility, which holds ISO 9001 certification.
- 01 uPVC profile systems designed and manufactured in the UK to ISO 9001 standards.
- 02 Multi-chambered profile design engineered to reduce heat transfer and cut energy bills.
- 03 Every Liniar system is covered by manufacturer guarantees and warranties.
- 04 A wide colour and finish range, fitted and finished by our own installation team.
Flush Sash Window Specification
Built on Liniar’s Resurgence system, engineered specifically to replicate a pre-1932 timber window.
- Profile
- 80mm-deep Liniar Resurgence system, available with mechanically-jointed corners for a traditional timber-frame appearance.
- Period Match
- Designed to replicate the look of pre-1932 timber windows, difficult to distinguish from real wood.
- Weatherproofing
- The UK’s first double-rebated seal, for genuinely wood-window-level weatherproofing.
- Finish
- Woodgrain foils available inside and out, or a plain white interior with a foiled exterior.
- Thermal Performance
- U-value as low as 0.84 W/m²K on the whole window, with an energy rating of up to A+.
- Sound Reduction
- Up to 37 decibels of noise reduction.
- Security
- PAS24 & Secured by Design accredited, compliant with Part Q.
- Guarantee
- Backed by a 10-year frame guarantee.
Figures are for Liniar’s 80mm Resurgence flush sash system as published at liniar.co.uk .
Flush Sash Configuration Options
Our flush sash windows are made to measure, with a range of Liniar Resurgence configuration options available.
- Corner Joint
- Mechanical, welded or Timberweld® corner options, for the exact traditional or contemporary finish you want.
- Bar Options
- Georgian or astragal bars available for a period-style glazing grid.
- Arched Tops
- Liniar profiles can be curved to form arched or circular window shapes.
- Bow & Bay Configuration
- Liniar couplers allow flush sash windows to be joined into a bow or bay configuration.
- Matching French Windows
- Pair with Resurgence French windows for a dual-sash opening and unobstructed views.
Flush Sash Window Colours and Finishes
Colours and lead times vary, so get in touch with our team for the full range, or see Liniar’s Resurgence colour options at liniar.co.uk .
Flush Sash Window FAQs
Are uPVC flush sash windows cheaper than timber?
Traditionally crafted timber windows can be expensive to manufacture, with ongoing maintenance costs for sanding, staining or painting. Liniar’s Resurgence flush sash windows are typically more cost-effective over the life of the window once you factor in maintenance and the energy savings uPVC offers over timber.
Can flush sash windows be installed in listed properties or conservation areas?
Councils are increasingly open to uPVC flush sash windows in conservation areas and on listed buildings, since they closely replicate the appearance of historical timber windows. Requirements vary by council and property, so it’s worth checking with your local conservation officer before ordering.
Will a foiled finish look like real wood?
Foils are applied at the manufacturing stage using precision machinery, and can be laminated on both the inside and outside, or the interior can be kept plain white. Closed, a foiled Resurgence window is difficult to distinguish from real timber.
What makes flush sash windows different from standard casement windows?
Unlike a standard uPVC casement window, a flush sash window has no external overlap — the sash sits flush within the outer frame, just like a timber window, rather than sitting proud of it.
Interested in Flush Sash Windows?
Request your free, no-obligation quote today.