Transform your home with our
Sliding Sash Windows
Beautifully foiled in a wide range of colours our sash windows can be customised to suit your home improvement vision!
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- Family-run for over 35 years
- Made in Britain
- 10 year Guarantee
- Save Energy & Lower Bills
- A-Rated Frames
Premium Sliding Sash Windows
Spire’s quality range of vertical sliding sash windows offer versatility and are the most popular choice available today.
When you choose our PVCu sash windows you choose warmth, security and peace of mind. Our high performance double glazed sliding sash windows are also draught proof, ensuring you are warm and snug throughout the colder months.
Our sash windows come with features that can reduce your heating costs and improve the energy efficiency of your house. They can be customised to fit your home’s style. From configurations to colour schemes. We have something for everyone!
Ready to transform your home with our Windows?
Need some inspiration?
Get your inspiration and ideas from Spire customers who have transformed their homes.
Our inspirations portfolio is the perfect taster of all the amazing home improvement choices we have to offer.
Conservatory Case Study
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Patio Doors
More Information
Dura Doors
More Information
Visit our showroom
If you’d like to see our designs up close, you’re always welcome at our Louth showroom.
Located next door to our factory, our showroom features a range of our windows, doors, conservatories, and Thermotec roofing. Feel free to discuss your requirements with our helpful team, or simply enjoy browsing.
"The entire team were totally professional from start to finish. Ultra friendly and comprehensive in their systems. Fitters loved a bacon bun too"
"From start to finish we had outstanding customer service. I can honestly say the best of the best windows and doors I’ve seen from spire windows. I’m not just saying this but the quality of each window is outstanding and the 2 men that fitted Ian and Bernard worked extremely hard to get our windows and doors fitted in 4 days they fitted 10 windows and 2doors front and back. Both men were friendly , honest and polite . If you are thinking of getting new windows ,doors etc I can recommend Spire Windows in Louth"
"Very professional from start to finish. From our first visit and quote to the installation of our windows and door. The timeline was pretty much as quoted and the two installation technicians, Paul and Correy, were very good, professional and respectful of our property. Thank you."
"Excellent service from start to finish. Really tidy workers no mess and very efficient all of them .would certainly recommend this company"
"Had 10 windows and 3 doors fitted by Spire. From the initial meeting with Peter to the installation everything was explained in detail professionally. No hard sell like other companies just a fair price for great quality windows. The installation team were friendly, hard working and tidied up after themselves despite some very challenging weather."
The Spire difference
The 
difference
We treat you like you’re a part of the family. Aggressive selling, false promises, hidden charges? Nope! You don’t get any of that nonsense here. Just open, honest, straightforward and friendly service from a family-run team that truly cares.
Design visit
Once we’ve received your enquiry, we’ll arrange for a surveyor to visit your property. They’ll answer your questions and provide you with a quote.
Technical survey
An experienced surveyor will visit your home to conduct the final checks and take measurements for the manufacturing process.
Bespoke UK manufacture
We create made-to-measure products for your home on-site at our Louth factory. If you’d like to see our factory, why not pay us a visit?
Installation
Our experienced local fitters will complete the installation, minimising disruption to your daily routines.
Aftercare
We’ll provide a follow-up call to ensure you’re 100% satisfied. We also offer a 10-year, in-house guarantee.
Why our Sliding Sash Windows?
When it comes to sash windows, we believe our quality and service are second to none. Here’s what makes us different
Safe and Secure
All of our windows are manufactured with safety in mind, what is why we only use top of the range security features.
A Warmer Home
Our sash windows are manufactured with thermally efficient PVCu. Additionally, double glazing is one of the best methods of retaining heat within your home.
Money Saving Innovation
Our frame easily achieves WER of A+ and a u-value of 1.2 with reasonably priced double glazing thanks to our lead-free, multi chambered profiles, and innovative gasket seal thermal dam.
Sash Windows Gallery
Here's some of our most frequently asked questions...
How much do uPVC sash windows cost for a typical 3-bedroom house?
The cost of installing new sash windows in a 3-bedroom home depends on the dimensions of the box frames, the choice of sliding mechanism (traditional weights and cords or modern spring balances), and your preferred hardware finishes. Because Spire Windows manufacture our own high-quality uPVC sash frames, we cut out the middleman entirely. This allows us to provide the classic aesthetic of timber with the competitive, transparent pricing of modern uPVC with absolutely no hidden extras.
How long will new uPVC sash windows last?
A premium uPVC sash window is designed to last upwards of 20 years. Unlike traditional timber sashes which can rot or swell, our uPVC frames are weather-resistant and won’t stick in the frame. The longevity depends on the durability of the internal balances and the quality of the weld. With Spire Windows’ 40-year heritage, you can be confident that our vertical sliders are engineered to stand the test of time, keeping your home secure and draught-free for decades.
How long does it take to install sash windows?
Installation time varies based on the size of the apertures and whether we are replacing the full box frame or performing a sash-only insert. Our skilled craftsmen are experts in the specific structural requirements of sash installations, ensuring minimal disruption to your home. Spire Windows prides itself on a swift, efficient, and tidy process – we even responsibly dispose of your old frames and glass, leaving your home spotless and your new windows perfectly balanced.
How do I know if my existing sash windows need replacing?
Key signs include noticeable draughts around the meeting rails, sashes that “creep” down on their own, or broken sash cords that make the window dangerous to open. If you have older timber units, you might also notice rattling during high winds or visible rot in the sill. By upgrading to Spire Windows’ energy-efficient uPVC sash frames, you retain the classic heritage look of your property while significantly improving thermal insulation and security.
