Transform your home with our
Flush Sash Windows
At Spire Windows, we are proud to offer elegant flush sash windows at competitive prices!
Flush sash windows are sleek, stylish and provides a classic feel. Enjoy a premium home experience when you have our flush sash windows installed.
Our stunning flush sash windows can be made bespoke to suit your specifications.
Request a quote
Fill out the form below and a member of our team will be in touch shortly.
- Family-run for over 35 years
- Made in Britain
- 10 year Guarantee
- Save Energy & Lower Bills
- A-Rated Frames
Premium Flush Sash Windows
Our range of high-quality flush sash windows is an incredibly popular choice. The reason for this is the sleek, clean look that flush sash windows provide. Not only do our flush sash windows look amazing, but they are also high-performing. With a plethora of benefits, it is clear why flush sash windows have grown in popularity!
Our flush sash windows come with innovative features that can significantly improve the energy efficiency of your home and, in turn, reduce your heating bills. Our double glazed flush sash windows are affordable, amazing value for money and come with A ratings as a minimum.
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
Read more
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 Flush Sash Windows?
If you’re considering flush sash windows, we’re confident you won’t find a higher-quality product or a more dedicated service anywhere else. Here’s why customers choose us
A Warmer Home
Our flush sash windows are both energy and thermally efficient. This is due to their material, design and finer details.
Bespoke Designs
Our flush sash windows can be made bespoke to enhance your home’s personal style. From configurations to colour schemes. We have something for every home!
Flush Sash Windows Gallery
Here's some of our most frequently asked questions...
How much do uPVC flush sash windows cost for a typical 3-bedroom house?
The price of fitting a 3-bedroom house with new flush sash windows varies based on the number of openings, frame dimensions, and your choice of authentic finishes – such as woodgrain foils or heritage hardware like monkey tail handles. Because Spire Windows manufacture our own high-quality uPVC flush frames, we cut out the middleman. This allows us to offer this premium, timber-effect aesthetic at highly competitive, transparent prices with no hidden extras.
How long will new uPVC flush sash windows last?
A premium uPVC flush sash window is designed to last upwards of 20 years, offering the timeless look of wood without the risk of rotting, warping, or the need for repainting. The lifespan depends on the quality of the weld and the durability of the concealed or heritage hinges. Spire Windows has been trading for nearly 40 years, so our bespoke flush frames have truly stood the test of time. With just a wipe-down and minimal maintenance, your windows will keep their elegant, period-correct appearance for decades.
How long does it take to install flush sash windows?
The installation time depends on the size of the apertures and how easily your existing frames can be removed. Our team of skilled craftsmen are experts at fitting flush styles – ensuring that the sleek exterior lines are perfectly aligned with your brickwork for that signature flat finish. Spire Windows prides itself on a swift, efficient, and tidy installation process; we even responsibly dispose of all your old frames and glass, leaving your home spotless.
How do I know if my existing windows need replacing with flush sashes?
If your current windows look bulky, have visible gaps, or suffer from draughts and “blown” double glazing (condensation between the panes), it’s time for an upgrade. Many homeowners switch to flush sashes when they want to restore a period property’s character or add a minimalist, modern edge to a new build. By upgrading to Spire Windows’ latest energy-efficient and highly secure flush frames, you’ll immediately improve your home’s thermal performance and achieve a high-end “timber-look” kerb appeal.