Authentic heritage styling
Flush-fitting sashes replicate traditional timber joinery without the maintenance burden.
Why choose flush sash windows?
Flush sash windows close so the sash sits perfectly level with the outer frame, creating a smooth, uninterrupted external surface. It's a design rooted in Georgian and Victorian architecture, now reimagined in high-performance uPVC. The result is a window that looks exceptional, performs brilliantly and needs almost no upkeep.
- Slim equal sightlines for maximum glazed area
- Woodgrain and colour foil finishes available
- Suitable for conservation areas and period properties
- A-rated energy efficiency as standard
- Concealed hardware for a clean, uncluttered look
Thermal efficiency
Multi-chamber uPVC profiles and argon-filled glazing reduce heat loss significantly.
Enhanced security
Multi-point locking systems fitted as standard for complete peace of mind.
Virtually zero maintenance
uPVC won't rot, warp or discolour – just a simple wipe-down keeps them pristine.
- Colours
- Glazing & Security
- Downloads
A colour for every property style
Choose from a wide range of woodgrain foils, contemporary solid colours and dual-colour combinations to perfectly complement your home inside and out.
Black
Cream
Golden Oak
Irish Oak
Rosewood
White
Glazing and security options built for modern living
Our flush sash windows are available with double or triple glazing, Low-E glass and argon gas fills for outstanding thermal performance. All units feature internally beaded glazing and multi-point locking as standard, with options for laminated or toughened glass to further enhance safety and soundproofing.
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Product literature and technical documents
Download our flush sash window brochure and technical specification sheets below. If you need additional information ahead of your survey, our team is happy to help.
Traditional looks, modern performance – the best of both worlds
Flush sash windows were the standard window design on Georgian, Victorian and Edwardian properties across Britain. Today, that same flat-fronted profile is achieved using advanced uPVC and high-performance glazing, giving you all the period character without the costly upkeep that timber demands.
At Allglass Anglia, we supply and install flush sash windows across East Anglia with a straightforward, professional process. From accurate survey through to a clean finish on the day, you get a result that looks right and performs even better.
Professionally installed flush sash windows across East Anglia
Getting flush sash windows right comes down to the installation. An ill-fitting window – however well made – will let in draughts, look uneven and underperform on energy efficiency. Our experienced team ensures every window is correctly measured, prepared and fitted to sit true and flush within the opening.
We coordinate the full installation process, including the use of cavity closers sourced from Eurocell’s trusted Cavalok range, so your new windows are thermally sealed, structurally sound and finished to the highest standard. One point of contact, no gaps in the process.
Trusted, certified and industry approved
14 accreditations that speak for our standards
Our accreditations are not box-ticking exercises – they are the evidence of a business that takes quality, safety and compliance seriously. Each certification reflects the rigorous standards we hold ourselves to on every project we undertake.
From FENSA registration to industry body memberships, our credentials give homeowners, developers and contractors the confidence to choose Allglass Anglia as their glazing partner of choice.
Flush sash windows – your questions answered
We know choosing new windows is a big decision. Here are the answers to the questions our customers ask most often, so you can move forward with complete confidence.
A standard casement sash overlaps the outer frame when closed. A flush sash sits level within the frame, creating a smooth, flat exterior surface that closely replicates the look of traditional timber windows.
In many cases, yes. The flush external profile replicates the appearance of historic timber windows, making them more likely to satisfy conservation area officers than standard casement styles. We recommend checking with your local planning authority first.
We offer double and triple glazing with Low-E glass and argon gas fills. Laminated and toughened glass upgrades are also available, improving both safety and acoustic performance.
Very little. uPVC won't rot, warp, peel or discolour. An occasional wipe-down with a soft cloth and mild soapy water is all that's needed to keep them looking their best for years.
Yes. We offer a wide range of colour foils including woodgrain effects and contemporary shades, with dual-colour options available. Every window is made to measure to suit your exact opening size and specification.
Can’t see the answer you’re looking for?
We have worked with Allglass for several years now and consider them a trusted supply...
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Peter Puttock
Morgan Sindall
We have worked with Allglass successfully across multiple projects and delivery schemes throughout Suffolk. Their...
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Andy Bates
Concertus
We have worked together with All-Glass on numerous projects and recommend their service, both in...
Read more
Tristan Smith
Smith of Honingham
It has been a pleasure working with All Glass. Their team has consistently delivered in...
Read more
Matt Beaman
Crest Nicholson
We have been using Allglass for around 15 years and have built up and excellent...
Read more
Damien Kerry
Barnes Construction
Outstanding! I found this company after my elderly mum got ripped off by a door...
Read more
Sybil Bell
via Google
We have worked with Allglass for several years now and consider them a trusted supply chain partner to deliver the packages they excel in on our varied projects from a single door set to complex curtain walling systems. Package management is precise from preconstruction to delivery on site and beyond to aftercare. Our contact points in Sean & Darrin are attentive in all respects from early engagement on advice, to completion of their order with unwavering commitment. Allglass, where we can have in the mix, will remain so moving forward on the projects we feel can benefit from their input, which includes the full support they provide in support of our wider culture and approach to Safety Health & Environment, carbon reduction, Social Value Initiatives , and Enhanced Quality delivery as this is valued and key to both our successes
Peter Puttock
Morgan Sindall
We have worked with Allglass successfully across multiple projects and delivery schemes throughout Suffolk. Their consistent quality, professionalism and collaborative approach have made them a valued and trusted supply chain partner. Time and again, they have demonstrated a commitment to delivering excellent outcomes and working positively with clients, consultants and contractors alike.
Andy Bates
Concertus
We have worked together with All-Glass on numerous projects and recommend their service, both in pre-production, production and aftersales. Ben has always been very responsive, and we look forward to working together in the future.
Tristan Smith
Smith of Honingham
It has been a pleasure working with All Glass. Their team has consistently delivered in line with the programme, always maintaining a proactive and collaborative approach to overcoming any issues that arose. Their product quality has been excellent, and their commitment to customer care has been outstanding throughout the development. They have been responsive, professional, and focused on delivering the right outcome, making them a reliable and valued supply chain partner. I would have no hesitation in recommending All Glass and look forward to working with them again on future projects.
Matt Beaman
Crest Nicholson
We have been using Allglass for around 15 years and have built up and excellent relationship with the business and their team over this time. We would happily recommend them to others and have found their service and quality to be of the highest order.
Damien Kerry
Barnes Construction
Outstanding! I found this company after my elderly mum got ripped off by a door to door window salesman. I managed to cancel that order and shopped around to find a local company that would look after my mum properly. Allglass were amazing. Friendly, honest, transparent, reliable. They were caring and mindful that my mum had been ripped off before. Their prices are sensible and fair and the quality of the workmanship is superb. I hope people considering any work like this will use this company - can highly recommend them.
Sybil Bell
via Google
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