Do sliding sash windows need lots of maintenance?

No—unlike old timber, modern uPVC and aluminium don’t rot or warp. They only need occasional cleaning, and tilt-in sashes allow safe external pane cleaning from indoors.

Sliding Sash Window Services in Southeast England

Q: What are sliding sash windows and why are they popular?

They are traditional windows where the sashes slide vertically. Popular for heritage look in Georgian/Victorian homes while delivering modern energy efficiency and security.

Q: Are your sliding sash windows energy-efficient?

Yes—uPVC and aluminium options with double or triple glazing, low-E glass and draught reduction to improve U-values while keeping ventilation options.

Q: Are your sliding sash windows secure?

They feature multi-point locking, reinforced frames and optional laminated safety glass. Many models are PAS 24 compliant and can meet Secured by Design.

Q: Can sash windows be customised to suit my property?

Yes—choose colours, woodgrain foils, astragal/Georgian bars, sash horns and hardware to match traditional or contemporary styles.

Q: Do I need planning permission for sliding sash windows?

Usually not for like-for-like replacements. Listed buildings, conservation areas or structural changes may need consent; advice is provided during the survey.

Q: How much do sliding sash windows cost?

Pricing depends on material, sizes, glazing and finishes. uPVC is generally more cost-effective; aluminium offers slimmer sightlines and durability. Free itemised quotes and finance options are available (subject to status).

Q: Do you offer traditional details like sash horns and Georgian bars?

Yes—specify decorative sash horns, astragal Georgian bars, run-through horns and traditional glazing patterns to replicate original timber sashes.

Q: How long does installation take?

Most installations complete in around 1–3 days depending on property size, number of windows and access. Timescales are confirmed with your quote.

Q: What guarantees do you provide?

A 10-year insurance-backed installation guarantee plus manufacturer warranties on frames, hardware and sealed units. Installations are FENSA-registered.

Aluminium and uPVC Sliding Sash Windows for homes & businesses across Southeast England

Abundant natural light and airflow

Upgrade your property with aluminium or uPVC sliding sash windows.

Transform your home or commercial building with a classic yet high-performing set of sliding sash windows that seamlessly blend with your existing style. While traditional timber sash windows became popular in Britain in the mid-1600s, today’s property owners often opt for more durable, high-performing materials like uPVC and aluminium.

Our uPVC and aluminium sliding sash windows are not only suited to period and listed buildings in Southeast England but also to modern homes and commercial buildings. At Instant Windows & Doors, we repair and replace sliding sash windows to suit your precise requirements.

Available in a variety of colours, finishes and glazing styles, we can even design your sliding sash window replacements to look exactly like your original timber sashes.

Whatever your requirements, our experienced sliding sash window installers across Southeast England will guide you through everything you need to know to make the best window choice for your home or business.

Preserve the classic look while benefiting from smoother operation, improved energy efficiency, and much lower maintenance! Whether you're a homeowner looking to upgrade a period property or a business owner seeking to add a touch of style to a modern office environment, our aluminium and uPVC sliding sash windows offer the perfect solution.

An easy, cost-effective way to enhance your property in Southeast England.

All our sliding sash window installers in Southeast England are FENSA-registered.

We pride ourselves on delivering a fast and efficient sliding sash window installation service and are always available to carry out sliding sash window repairs to the highest industry standards.

Upgrade your property with aluminium or uPVC sliding sash windows

Key features of uPVC and aluminium sliding sash windows:

A-rated energy performance as standard
Increased natural light and airflow
Perfect for period and modern homes
Smooth upward & downward open/close function
Tilt-in operation for easy external cleaning
Increased security using PAS 24 multi-point locks
Low maintenance with no external sanding or painting
Cost-effective way to increase property value

Benefits of sliding sash windows we install across Southeast England

Our certified uPVC and aluminium sliding sash window installation and repair service is available across the southeast of England. Benefits of our sliding sash windows include:

Weather Resistance
Improved Ventilation
Customisable Designs
Robust and Durable
Eco-Friendly Sash Windows

Increased Property Value
uPVC & Aluminium Sliding Sashes
Timber Sash Window Replacements
Classic or Modern Appearance
Low-Maintenance Sash Windows

High Energy-Efficiency
Enhanced Security & Safety
Smooth Operation
Noise Reduction

Why choose Us to install your aluminium or uPVC sliding sash windows:

Industry-Standard Compliant

Reliable & Certified Sliding Sash Window Installers

At Instant Windows & Doors, our sliding sash window installers are FENSA-registered; FENSA stands for Fenestration Self-Assessment and is a government-authorised scheme that monitors building regulation compliance for replacement windows and doors.

In friendly terms, a FENSA certificate assures you that the sliding sash window installer who fitted your sliding sash windows has complied with Building Regulations and registered the installation with the Local Council; both are legal requirements!

If you ever decide to sell your home or business premises, proof of them is essential.

High-Performance Security

PAS 24 British-Standard Sliding Sash Windows

Double-glazed uPVC and aluminium sliding sash windows add an extra layer of security to your home or workplace. They are installed with an internal layer of glass that cannot be removed from the outside and top-notch PAS 24 British-standard multi-point locking systems that effectively deter opportunists from breaking in.

Our sliding sash windows offer peace of mind for home and business owners across Southeast England. Sleep at night knowing your loved ones and business assets are safe!

Why choose Us to install your aluminium or uPVC sliding sash windows

Upgrade your Sliding Sash Windows to PAS 24 British Security Standard

PAS 24 is a UK security standard that assesses the performance of windows and doors against entry and intrusion. PAS 24 certifies that a product has been tested and meets specific security requirements. Upgrade your existing uPVC or aluminium sliding sash windows with a simple laminate glass system.

Insurance-Backed Guarantee

Backed by Home Improvement Protection Scheme

Invest with confidence. At Instant Windows & Doors, we use the best energy-rated systems available on the market and include a 10-year insurance-backed guarantee with every uPVC or aluminium sliding sash window installation.

It is also worth mentioning that our sliding sash windows are backed by the Home Improvement Protection scheme - for your safety and investment security.

5 good reasons to choose sliding sash windows for a home or business in Southeast England:

Energy Efficient & Eco-Friendly

Enjoy year-round warmth and comfort with our energy-efficient sliding sash windows, available in uPVC and aluminium. Our sliding sash windows are installed with double- or triple-glazing, ensuring your home or business premises stay cooler in the summer and warmer during the winter months. Save money on monthly energy bills and improve the overall performance of your property in Southeast England, with new sliding sash windows installed to the highest industry standards.

Smooth Operation & Functionality

Modern double-glazed aluminium and uPVC sliding sash windows feature robust, quality mechanisms that guarantee smooth, easy sliding functionality. Say goodbye to ropes and weights! Using spring or spiral balances, we install sliding sash windows that open and close effortlessly, giving your home or business premises the perfect upgrade.

Weather-Resistant & Soundproof

When installed with double- or triple-glazing, our sliding sash windows reduce noise pollution significantly, resulting in a much quieter, calmer indoor environment. Whether upgrading your office for a more focused workspace or reducing outside noise for a more peaceful home, our sliding sash window installers across Southeast England are here to help. To top it off, you never need to worry about weather damage. Our double-glazed uPVC and aluminium sliding sash windows withstand the elements, including resistance to fading and deterioration from sun, rain and wind!

5 good reasons to choose sliding sash windows for a home or business in Southeast England

Low Maintenance, High Performance

Eliminate the need for timber sash window maintenance, such as repainting and resealing. Our aluminium and uPVC sliding sash windows offer a perfect timber sash window replacement and do not warp, rot or decay, meaning minimal maintenance is required to keep them looking as good as new. A simple clean is all they need, freeing up more time and saving you more stress in the long run.

Stylish & Secure

Enjoy the classic charm of timber sliding sash windows with the modern performance of aluminium or uPVC. Available in timber-effect and colour finishes, they enhance your home or business premises while providing top-notch security with reinforced frames and secure locking mechanisms.

Our sliding sash windows in Southeast England are customised to integrate seamlessly with your property's interior and exterior design.

Sliding Sash Windows FAQs: Heritage Style, Modern Performance & Installation in South East England

What are sliding sash windows and why are they popular?

Sliding sash windows are a traditional style where the sashes slide vertically instead of opening outwards. They are popular for heritage homes, Georgian and Victorian properties, and anyone wanting a period look with modern energy efficiency and security. Our sash windows replicate classic detailing while benefiting from today’s double-glazing technology.

Are your sliding sash windows energy-efficient?

Yes — our uPVC and aluminium sliding sash windows are fitted with double or triple glazing, low-E glass and draught-reducing seals. These features significantly improve U-values and help reduce heat loss, while maintaining excellent ventilation options with smooth sliding operation.

Do sliding sash windows require lots of maintenance?

No — unlike old timber sash windows, our modern uPVC and aluminium sash designs are low maintenance. They don’t rot, warp or swell, and only need occasional cleaning. The tilt-in facility also allows you to clean the outside panes safely from inside your home.

Are your sliding sash windows secure?

Yes — our sash windows are designed with modern security features such as multi-point locking, reinforced frames and optional laminated safety glass. Many are PAS 24 compliant and can meet Secured by Design standards for enhanced protection.

Can sash windows be customised to suit my property?

Absolutely. Choose from a wide range of colours, woodgrain foils, glazing bars, astragal bars, sash horns and hardware. Whether you want a traditional white Georgian look or a modern grey sash with contemporary fittings, we’ll help you design windows to match your property’s style.

Do I need planning permission for sliding sash windows?

In most cases, replacing existing windows with sliding sash designs does not need planning permission. If your home is in a listed building or conservation area, or you are changing the size or style of openings, permission may be required. We’ll advise during your free survey and help with any applications if needed.

How much do sliding sash windows cost?

Prices vary depending on material (uPVC or aluminium), size, glazing specification and finish. uPVC sash windows are generally more cost-effective, while aluminium offers slimmer sightlines and higher durability. We provide free, itemised quotes and finance options (subject to status).

Do you offer traditional features like sash horns and Georgian bars?

Yes — our sliding sash windows can be specified with decorative sash horns, astragal Georgian bars, run-through horns and traditional glazing patterns. These replicate the charm of original sash windows while delivering the benefits of modern double glazing.

How long does installation take?

Most sliding sash window installations are completed within 1–3 days depending on property size, number of windows and access. We’ll confirm timescales in your quote and keep you updated throughout the process.

What guarantees do you provide?

All our sash window installations come with a 10-year insurance-backed guarantee, plus manufacturer warranties on frames, hardware and glass units. Your installation will also be FENSA-registered for compliance and peace of mind.

Which areas do you cover for sliding sash window installation?

We install sash windows across Hampshire, West Sussex, East Sussex, Surrey, Berkshire and parts of Kent & Greater London. See our Areas We Cover page or Request a Quote to check availability in your area.

How do I request a free survey and quote?

Simply call 0800 368 9166, message us on WhatsApp 07932 960284, email sales@instantwindowsanddoors.co.uk or complete the Request a Quote form. We’ll schedule a convenient survey and provide expert advice tailored to your property.

Call us to discuss
your project.

Contact Martin & his team for a free sliding sash window quotation.

At Instant Windows & Doors, we guarantee a reliable and trustworthy sliding sash window installation and repair service anywhere across Southeast England.

Book one of our local and certified sliding sash window installers in your area and receive a rapid response service with no call-out charge and a super-fast turnaround.

We always make time for our clients and promise to deliver an expert sliding sash window installation and repair service according to your needs.

Receive expert guidance based on your requirements and make informed decisions to ensure you get the most out of our sliding sash window service.

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Competitively priced windows and doors in Southeast England.

At Instant Windows & Doors, we assure you of a dependable and trustworthy window and door installation and repair service available throughout Southeast England. Schedule one of our local, certified installers in your vicinity, and enjoy a prompt response without any call-out fees and swift service turnaround.

We are dedicated to prioritising our clients and ensuring the provision of expert window and door installation and repair services tailored to your specific requirements.

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Instant Windows and Doors covers the following areas

Check out the areas we work in ➔ ✅ Hampshire ✅ West Sussex ✅ East Sussex ✅ Sutton ✅ Bromley ✅ Croydon ✅ Berkshire ✅ Surrey ✅ Parts of Kent ✅ Parts of Greater London