Sliding sash windows have been a feature of UK homes for almost 400 years. Considering all the changes the country has seen in that time, the fact that they are still found up and down the country today speaks volumes about their functional design and timeless look.
We’ve installed multiple sliding sash window sets across Crawley, and the homeowners always have good reason for choosing them. Some love the traditional appearance, reminiscent of the Georgian era that’s synonymous with elegance. Others recognise the practical benefits, their easy operation allows plenty of natural light and fresh air to enter your home.
Although more are citing their elite thermal performance as a reason for choosing uPVC sliding sash windows, as they look to reduce energy bills and carbon footprint.
At BSF Windows, our uPVC sliding sash windows can also be finished in a variety of woodgrain effects, such as Irish oak, golden oak or white woodgrain, allowing you to replicate the beauty of older timber windows while enjoying modern performance. In this blog, we’ll explore them in more detail, including how they complement Crawley in particular, as well as the unique benefits added by uPVC.
Introducing sliding sash windows
Sliding sash windows, often simply called sash windows, date back to the 17th century and have remained a staple of British architecture ever since. Originally crafted from timber, they consist of two sashes that slide vertically within the frame. This classic vertical movement allows you to easily control ventilation while maintaining a neat, elegant appearance.
Despite their historical origin, sliding sash windows are now commonly found in new builds as well as more traditional properties. Most people choose uPVC, as it can now be finished to replicate the textured, grained look of timber whilst coming in at a lower price point and requiring less maintenance.
What are the benefits of sliding sash windows for homes in the Crawley area?
Crawley’s housing is a mix of period properties, modern builds, and conservation areas. Sliding sash windows fit seamlessly across these diverse settings, providing both functional and aesthetic benefits.
Period aesthetics and heritage charm
Sliding sash windows maintain the architectural style of older homes, complementing traditional homes and period properties. Their timeless design adds market value and ensures your home’s character is preserved.
Ventilation and natural light
With their vertical sliding design, sash windows offer excellent control over airflow. You can enjoy fresh air without compromising security, while large panes allow natural light to flood your home.
Conservation area compliance
For homes in Crawley’s conservation areas, sash windows are often the preferred choice. Our uPVC sash windows can mimic timber frames, meaning you can maintain heritage charm while benefiting from modern performance.
Easy operation and smooth operation
Modern sash windows from BSF Windows feature smooth operation and tilt-in functionality, making cleaning and everyday use simple and stress-free.
Space-saving design
Unlike casement windows that open outward, sliding sash windows don’t encroach on your garden, balcony, or pavement. This makes them an excellent choice for urban areas or smaller plots.
What is uPVC and why is it such a beneficial material for sliding sash windows?
uPVC (unplasticised polyvinyl chloride) is a synthetic material widely used in window and door manufacture. It is strong, durable, and highly resistant to the elements, making it the most popular choice for replacement windows across Surrey and West Sussex.
Thermally efficient
uPVC frames help reduce heat transfer, which means less energy loss and lower energy bills. In 2026, improving your home’s thermal efficiency is more important than ever, both for comfort and for reducing your carbon footprint.
Low maintenance
uPVC sash windows require very little upkeep. They don’t need painting or staining and can be quickly cleaned with a damp cloth, perfect for busy homeowners.
Customisable
While you’ll struggle to walk down any Surrey street without seeing a white uPVC window frame, today’s uPVC sash windows are available in a wide range of colours and finishes.
Foiled timber-effect options like Irish oak, golden oak, or Cotswold cream allow you to replicate the look of traditional timber, while every RAL shade is available for bespoke colour matching.
Cost-effective
uPVC’s manufacturing process allows it to be produced efficiently, keeping costs down without compromising on quality. Alongside reduced energy bills, it provides long-term value for homeowners looking for new windows in Crawley.
Sliding sash windows from BSF Windows
At BSF Windows, we’ve completed multiple installations in Crawley, Horley, Guildford, Dorking, and across Surrey & West Sussex. We understand local housing styles, conservation area requirements, and popular colours that suit different architectural styles.
Our sliding sash windows combine traditional aesthetics with modern features:
- uPVC frames with a variety of woodgrain effects
- Double or triple glazing for energy efficiency and noise reduction
- Advanced glazing options
- Tilt-in function for easy cleaning
- Smooth, easy operation
Popular colours and finishes:
- White woodgrain
- Irish oak
- Golden oak
- Chartwell green
- Cotswold cream
- Custom RAL colours available
FAQs
Are sliding sash windows suitable for period properties?
Yes, they preserve heritage charm and are often required in conservation areas.
Do uPVC sash windows reduce energy bills?
Yes, their double or triple glazing and thermally efficient frames minimise heat loss.
Can I get bespoke sash designs?
Absolutely, we offer a wide range of custom sash windows with different colours, glazing, and finishes.
Are sliding sash windows easy to maintain?
Yes, our uPVC frames need minimal upkeep and are simple to clean.
Do they improve a home’s market value?
Well-maintained sash windows can increase curb appeal and attract potential buyers.
Who are BSF Windows?
We are a trusted, family-run window supply and installation company serving Surrey and surrounding areas. With over 20 years of experience, we offer windows, doors, conservatories, and orangeries. Visit our showroom at 31–33 Station Road, Horley, Surrey, RH6 9HW, call us on 01293 408 713, or use our online contact form for a free no-obligation quote.
Our friendly team delivers reliable service, premium quality workmanship, and peace of mind with every installation.