There is one window style that remains popular in British and Irish homes: the sliding sash window. Its distinctive proportions and traditional character are easy to recognise. Although Fenbro does not currently offer traditional sliding sash windows, we can recreate their characteristic look using modern tilt and turn windows with a carefully positioned horizontal transom. This solution combines sash-style proportions with tight sealing, convenient operation and easier cleaning. Read on to see how amazingly it works!
Why do people still choose traditional sliding sash windows?
It is understandable why they remain so popular. Sliding sash windows have that classic look with slim proportions and traditional divisions that add so much character to a facade. Timber aesthetic and balanced design make them a natural match for period homes and heritage-style elevations. In many designs, both the upper and lower sash can be opened, helping fresh air circulate through the room.
The drawbacks you should know about
We are not trying to say that sliding sash windows are automatically inefficient or difficult to use, but their construction can involve several practical compromises:
- A more complex mechanism – vertical sliders contain more moving components than standard hinged windows.
- More maintenance – tracks, balances, cords or other parts may require regular care.
- More specialised servicing – repairs can be less straightforward, depending on the system.
- Potential draughts – older or poorly maintained sash windows can be more vulnerable to gaps and air leakage.
- Less everyday convenience – opening, cleaning and operating them may be less practical than using a modern tilt and turn window.
For these reasons – and with our customers’ long-term comfort in mind – Fenbro does not offer traditional sliding sash windows. For homeowners prioritising tight sealing, easy cleaning and convenient operation, we highly recommend a modern sash-look alternative instead.
Alternative to sash windows – the Fenbro solution
At Fenbro, we have developed a brilliant solution. The idea is simple: a horizontal transom is placed approximately where the two parts of a sliding sash would meet. The window does not move vertically, but the frame division creates a similar external proportion.
We have already used this solution in many projects. One section can be fixed and the other tilt and turn, whilst other configurations may be possible within the limits of the selected system. This means the appearance and everyday operation can be considered separately. The transom, glazing bars and colour build the traditional external character, whilst the selected opening sections are planned around ventilation, cleaning and the way each room will be used.
It creates a sash-style appearance or heritage-inspired look rather than an exact copy. The opening method and interior remain different, but the view from outside can be surprisingly similar when the details are planned well.
How does it work in everyday use?
The openable section works like a modern inward-opening tilt and turn window:
- in the tilt position, the top of the sash moves inwards to provide controlled ventilation;
- in the turn position, the sash opens fully into the room, creating a wider opening and giving access to the outside surface of the glass.
Fenbro Specialists can help you plan the fixed and openable sections, handles and opening directions. Because the sash opens inwards, taps, furniture, blinds and deep window boards must also be considered.
Reasons to choose sash-look tilt and turn windows
Our Fenbro alternative was designed to preserve the traditional sash-style appearance whilst providing the comfort and practicality of a modern tilt and turn window:
- A sash-style appearance – a carefully positioned horizontal transom recreates the familiar proportions without a vertical sliding mechanism.
- Strong thermal performance – modern uPVC and aluminium systems can include double or triple glazing, insulated frames, compression gaskets and warm edge spacers.
- Flexible ventilation – tilt mode provides airflow without opening the window fully.
- Easier cleaning – turn mode usually makes both sides of the openable glass accessible from inside.
- Modern security – multi-point locking and additional security hardware may be available, depending on the system.
- More design freedom – choose from different colours, wood-effect foils and glazing bar arrangements.
Remember to compare the complete-window Uw value (window thermal transmittance), not only the Ug (glazing thermal transmittance) value of the glass.
Mock sash windows – uPVC or aluminium?
Another important thing to consider is the material. You may be wondering which is better for mock sash windows: uPVC or aluminium?
uPVC provides a strong balance of insulation, practicality, customisation and value, making it particularly suitable for whole-house replacements. It’s also really easy to clean.
Aluminium has the capacity to create sharper frame lines and may be better suited to larger structures or projects requiring a more sophisticated architectural finish. Softer colours and balanced proportions can also help it complement traditional architecture.
Remember that both materials can be combined in one house, provided their colours and frame divisions are carefully coordinated.
Is the sash alternative suitable for every property?
No, not always. Listed or protected buildings and homes in conservation areas or Architectural Conservation Areas may have rules covering materials, details and opening methods. Check with your local authority, conservation professional or architect before ordering.
For other homes, the choice is more flexible. If external character matters more than the mechanism, a sash-look tilt and turn window may be a good and practical option.
Sash-look windows in completed Fenbro projects
Over the years, Fenbro has supplied many tilt and turn windows that achieve a beautiful sash-inspired look – without vertical sliders and without any of the typical problems. 😉
When browsing the examples, look at more than one window. Check how the transom lines repeat across the elevation, how smaller and larger openings are treated and how the window colour works with the complete house. This project in Roscommon is a wonderful example.
Visit Our Projects to compare colours, materials, opening layouts and house styles. You can also read our guide to the differences between casement and tilt and turn windows.
Conclusion – sash style windows without compromises
So, after reading this article, you now know the smart alternative: sash-look tilt and turn windows. You do not necessarily need a vertical slider to create a sash-style character. A tilt and turn system with a well-positioned transom can provide similar external proportions and modern functionality inside.
Fenbro Specialists can help you choose a suitable uPVC or aluminium system and coordinate the transoms, openings, colours and glazing bars. Send us drawings, technical details, approximate dimensions and inspiration photos to request a quote – completely free of charge and prepared within just two working days. We are waiting for you!
Frequently Asked Questions (FAQ)
Does Fenbro offer traditional sliding sash windows?
No, Fenbro does not currently offer traditional sliding sash windows. Instead, we offer modern uPVC and aluminium tilt and turn windows that can be designed to achieve a similar sash-style appearance.
Can Fenbro supply windows that look like sliding sash windows?
Yes. By adding a carefully positioned horizontal transom, we can recreate the characteristic proportions of sash windows whilst retaining modern tilt and turn functionality.
Do Fenbro sash-look windows slide vertically?
No. The appearance is created through the proportions and horizontal frame division. The openable section uses tilt and turn functionality.
Which part of the sash-look tilt and turn window opens?
One section may be fixed and the other tilt and turn. Other arrangements may be possible depending on the system, size and technical requirements. The configuration will be shown in the window drawings.
Is a transom the same as a glazing bar?
No. A transom is part of the window frame and separates two sections. A glazing bar creates the appearance of smaller panes within the glass.
Are Fenbro sash-look windows available in uPVC and aluminium?
Yes, we offer options in both materials. uPVC often provides a practical balance of performance and value, whilst aluminium can offer sharper lines and a more architectural finish.
