When upgrading your windows, few styles offer sash windows’ charm, character, and classic design. But choosing the right types of sash windows for replacement can feel like a daunting task. With various materials, styles, and features now available, how do you know which is right for your home?
Whether replacing worn-out originals in a period property or installing them in a modern setting, understanding the different types of sash windows can help you make a more informed and rewarding decision. From traditional timber sash windows to modern uPVC sash windows, each option offers its own appearance, performance, and maintenance benefits.
At The London Sash Window Company, we specialise in high-quality, bespoke sash window replacements tailored to every home. Our team of experts ensures a seamless blend of tradition and innovation, giving you the best in design, durability, and energy performance.
Call us on 020 8017 1632 or drop us an email at office@londonsash.com to explore the ideal window solution for your property.
Upgrade your home with replacement sash windows that blend classic charm with cutting-edge efficiency. The London Sash Window Company delivers bespoke solutions tailored to your property—beautifully designed, expertly installed, and built to stand the test of time.
What Is A Sash Window?
A sash window is a traditional style that dates back to the 17th century, recognised by its movable panels (or “sashes”) that slide vertically or horizontally to open and close. Most commonly, these windows feature vertical sliding sashes, which allow either one or both panels to move up and down.
Sash windows are typically made from timber, although modern versions come in uPVC and aluminium options. They can be fitted with single or double glazing, often featuring glazing bars to divide the panes, adding to their period charm.
Key features include:
- A smooth sliding mechanism
- Balanced sashes (traditionally using weights or springs)
- Classic proportions, often seen in Georgian and Victorian architecture
Whether you’re restoring an older home or want to introduce a touch of timeless style to a new one, understanding the different types of sash windows is key to choosing the best fit.
Types Of Sash Windows
Let’s break down the most popular types of sash windows for replacement, exploring what makes each unique and which property types best suit them.
1. Single-Hung Sash Windows
Single-hung sash windows feature two panels, but only the bottom sash opens while the top remains fixed. This style offers a traditional look and is perfect for homeowners who value simplicity.
Best suited for: Period homes, rental properties, or upper-storey windows where ease of operation isn’t a priority.
Why choose them:
- Fewer moving parts mean less maintenance
- Often more affordable than double-hung windows
- Maintains the classic sash window aesthetic
They’re especially ideal for properties that want to retain authenticity without a high cost and are commonly used where ventilation needs are minimal.
2. Double-Hung Sash Windows
A modern upgrade to the traditional format, double-hung sash windows allow the upper and lower sashes to move. This offers greater airflow, improved cleaning access, and enhanced comfort.
Best suited for: Family homes, modern builds, or anywhere that needs flexible ventilation and functionality.
Why choose them:
- Great for airflow: Open both sashes to create a convection current
- Easier to clean, especially for upstairs rooms
- Often comes with double glazing for better energy performance
Double-hung windows are a top choice to combine period charm with modern practicality.
3. Sliding Sash Windows
Sliding sash windows refer to vertical sliding sash windows, including single and double-hung formats. Modern versions often use spring balances instead of traditional weights.
Best suited for heritage and new-build properties looking for a mix of tradition and innovation.
Why choose them:
- Smooth, reliable operation
- Minimal disruption during installation
- Suitable for conservation areas with modern performance standards
They’re ideal for those wanting the appearance of traditional wooden sash windows with modern ease of use.
4. Timber Sash Windows
Nothing matches the elegance of timber sash windows when it comes to authenticity. Crafted from hardwood or softwood, they’re often required in listed or conservation properties.
Best suited for: Historic homes, Georgian and Victorian properties, and areas with strict planning guidelines.
Why choose them:
- Perfect for period accuracy
- Can be fully customised with glazing bars, hardware and colour options
- Long-lasting when properly maintained
Timber windows require more upkeep, but their character and visual impact are often worth it for traditional homes.
Know more: Pros and Cons of Timber Sash Windows
5. uPVC Sash Windows
uPVC sash windows offer a cost-effective, low-maintenance alternative to traditional materials. They can replicate the timber look while providing excellent durability and thermal performance.
Best suited for: Budget-conscious homeowners, modern properties, or those looking for minimal maintenance.
Why choose them:
- Resistant to warping and rot
- Available in a wide range of finishes and colour options
- Typically, more energy efficient than older timber frames
If you want classic looks without the upkeep, uPVC sash windows are a practical option.
Also read: Timber vs. UPVC Sash Windows
6. Aluminium Sash Windows
Modern, sleek, and highly durable, aluminium sash windows offer a contemporary take on a classic design. Thanks to their strength, they can support larger panes of glass within slimmer window frames.
Best suited for: Contemporary homes, urban settings, or projects where durability and light are key.
Why choose them:
- Modern appearance with clean lines
- Low maintenance and long lifespan
- Excellent thermal insulation with modern tech
Perfect for those wanting the aesthetic of a double-glazed sash window with the performance of a high-end, modern aluminium window.
Energy-Efficient Sash Windows For Replacement
Modern replacement windows are designed to meet today’s standards in performance. Choosing energy-efficient sash windows for replacement helps you:
- Lower your heating bills
- Reduce your carbon footprint
- Increase indoor comfort year-round
Key features to look for:
- Double glazing or triple glazing
- Low-E coatings
- Insulated window frames
- Airtight seals and draught-proofing
Whether you opt for timber, uPVC, or aluminium, selecting energy-efficient options is key to a wise long-term investment.
Customising Sash Windows For Your Home’s Style
Today’s sash windows can be fully tailored to suit your home. You can choose:
- Heritage-style glazing bars
- Unique colour options to match your décor
- Decorative sash horns and period hardware
- Custom shapes and sizes for bay or arched windows
Customisation allows you to preserve your home’s character while upgrading performance.
CONTACT THE LONDON SASH WINDOW COMPANY
Conclusion
Choosing the right types of sash windows for replacement depends on your home’s architectural style, personal taste, and performance needs. There’s a perfect fit for every property, from energy-efficient timber heritage windows to durable, low-maintenance uPVC sash windows or sleek aluminium sash windows for modern spaces.
Whether you prioritise historical accuracy, energy efficiency, or long-term value, the right sash window will elevate your home aesthetically and functionally.
At The London Sash Window Company, we bring craftsmanship, experience, and bespoke design to every project. Our experts are ready to help you find the perfect window replacement solution that fits your home’s style, budget, and long-term vision.
Get in touch today and let us help you make your home more beautiful, efficient, and valuable.