Slim appearance
Featuring a 35mm mid-rail, our sliding sash windows are slimmer than most
Keep it cosy and love the winter.
With 2 years interest free credit or buy now pay 2026**
Get a price
Double Glazed uPVC Sash Windows
We specialise in supplying and installing bespoke uPVC sliding sash windows. Our uPVC windows offer an authentic period look with superior thermal performance, weather-resistance and home security than timber windows.
Choose from ECOMax double glazing or Comfort Glass—a specially coated alternative to triple glazing. uPVC windows are available in woodgrain effects in more than 150 attractive RAL colours. A range of sash window furniture includes authentic sash lifts, fasteners and pullers in a variety of stylish finishes.
Get A PriceView Window & Door BrochureRequest a Quick Quote
What are sash windows?
Sash windows are a common sight in Georgian and Victorian homes consisting of a movable panel that allows you to easily control the ventilation in your home. Our sliding sash windows allow you to retain the original character of your home while improving its performance.
Just like the originals, they are easily operated. Spring balances are concealed within the framework for easy adjustment and eliminating the need for cords. Either sash can also be tilted inwards to allow for easier cleaning. With traditional features such as an oval-shaped frame, classic sash horns, and authentic Georgian windows, they can be approved for use in conservation areas.
Get a priceWhat sash windows can do
Wide range of options
Designed to redefine classic sash windows, custom designs include run-through sash horns, no horn and deep cill options.
Exceptional home security is locked in
Able to last up to 35 years, our uPVC sash windows include heavy duty components
Low maintenance
Our uPVC sash windows offer a maintenance-free design that won't rot, crack, warp, or fade throughout their lifespan.
10 years’ product guarantees
All new windows carry a standard guarantee for 10 years on fit, function and finish.
Environmental protection
As well as offering EcoMax Glass, our uPVC sash windows incorporate a recycled section and are fully recyclable.
Our recent work shows what’s possible
Colours
Our finishes consist of popular wood effect finishes available in black, white, natural, oak and cream.
Get a price
White
Clotted Cream
Pearl Grey
Chartwell Green
Elephant Grey
Slate Grey
Slate Grey Grained
Basalt Grey
Anthracite Grey
Anthracite Grey Grained
Black Brown
Steel Blue
Racing Green
Ruby Red
Turner Oak
Irish Oak
Golden Oak
Rosewood
Mahogany
Walnut
Dark Oak
Glazing
Our uPVC windows come with EcoMAX Glass™, one of the most sustainable glass units on the market. You can also choose Comfort Glass for higher levels of thermal efficiency, security and noise reduction, or decorative glazing, such as stained glass, floral patterned, or modern etched glass.
Get a priceAdditional Features
Get a price
![Window with a white cill]()
![Window with an overhead concealed vent]()
Authentic Timber Look Cill
Radlington Cills are deeper nosed cills, one at the standard 30mm height and another at a 55mm height; they are reproductions of timber cills.
Overhead Ventilation
In overhead, concealed ventilation the external trickle vent is hidden on the head of the outer frame, providing a much-improved finish.
The Unique Appeal of uPVC as a Material
uPVC's appeal is in performance and reliability. It is a low-maintenance material which needs no painting or sealing. It is rot-resistant, saving you from regular upkeep. Additionally, uPVC sash windows offer outstanding insulation and reduce noise transmission. The material is available in a variety of colours, perfectly complementing any home exterior. With its durability and ability to withstand harsh weather conditions, uPVC is an excellent choice for your windows.
Get A PriceSliding Sash uPVC Windows
Sliding sash uPVC windows feature a traditional design with vertical sliding panels. They can be customised with Georgian or glazing bars to achieve a classic look. They are available in various glazing options for enhanced energy efficiency. With uPVC as the material, these windows offer a cost-effective solution without compromising on style. Enjoy the benefits of modern sash windows without the high maintenance. Sash windows also come with a draught-proofing system that ensures a snug weather seal.
Get A PriceHow Secure are Our uPVC Sash Windows?
Sash windows’ security features include sash fasteners that prevent the window from being opened from outside, sash window stops that limit opening of the window sashes from the inside, and meeting rails that stop them being picked or forced open. there are also safety latches that allow each sash to tilt inwards.
These sash windows exceed industry standards, giving you peace of mind that your home is safe and secure. Additional features can be included if security is your priority.
Contact SEH BAC
The Durability and Longevity of uPVC
uPVC sash windows are resistant to rot, ensuring that your windows remain in excellent condition for years at least 35 years. With minimal maintenance requirements, our uPVC sash windows provide long-lasting performance and high-quality aesthetics. Invest in uPVC for windows that will not only enhance your home but also provide you with peace of mind.
Get a priceThe Installation Process of Our uPVC Sash Windows
Our installation team takes care of everything when installing replacement sash windows. From measuring to fitting, we handle every step with care. We minimise disruption during the installation and take care of any necessary adjustments or modifications, such as replacing old sash windows with new ones, to ensure the perfect fit. Trust us to deliver professional and reliable uPVC sash window installation.
Get a price
Why Choose Our Supply and Fitting Service in the South East of England?
With a strong local presence, our experienced team understands the unique requirements of properties in this region. We offer a wide range of uPVC sash window options and our reliable and professional service prioritises customer satisfaction.
Get a priceOur Commitment to Timely and Efficient Installation
We understand the importance of a hassle-free installation experience. We prioritise timely installation to minimise disruption to your daily life. Our team of qualified professionals is trained to efficiently install uPVC sash windows, ensuring that the installation process is streamlined. Our goal is to complete the installation promptly without compromising on quality, so you can enjoy your new windows as soon as possible. Trust us for a seamless and efficient installation process.
Get a price
Why Choose Our Supply and Fitting Service in the South East of England?
Explore the benefits of choosing our supply and fitting service in the South East of England. With a strong local presence, our experienced team understands the unique requirements of properties in this region. We offer a wide range of uPVC sash window options, ensuring we meet your specific needs. Our reliable and professional service delivers high-quality products and exceptional customer satisfaction.
Get a priceConsiderations When Choosing uPVC Sash Windows
When choosing uPVC sash windows, there are several important considerations to keep in mind. Energy efficiency should be a top priority, as it can help reduce heat loss and save on energy costs. The durability of uPVC ensures that your windows will last for years to come, requiring minimal maintenance. Additionally, selecting the right colour for your uPVC sash windows can greatly enhance the overall look of your home. Our uPVC sash windows offer various options such as glazing bars and Georgian bars, allowing you to customize them to your liking.
Get a priceReady to Enhance Your Home with Our uPVC Sash Windows?
Transform the look of your home with our high-quality uPVC sash windows. Designed to match the style of your property, they offer a perfect fit. Our team is ready to assist you in choosing the right windows that enhance the beauty and functionality of your home. Experience the benefits of modern, energy-efficient windows today.
Get a priceCompare window styles
Bay Windows
- Available in high-performance uPVC or aluminium
- U-values as low as 0.8 W/m2K
- Multi-point locking system
Popular Colours:
Heritage Windows
- Made from uPVC to replicate timber
- Achieve A++ energy ratings
- Multi-point locking system
Popular Colours:
Tilt and Turn Windows
- Available in high-performance uPVC or aluminium
- U-values as low as 1.0 Wm2K
- Multi-point locking system
Popular Colours:
uPVC Sliding Sash Windows
- uPVC authentic timber-alternative sash window
- U-values of 1.4 W/m²k or lower
- Multi-point locking system
Popular Colours:
uPVC Flush Sash Casement Windows
- uPVC authentic timber flush sash window
- U-Values as low as 1.3 W/m2K
- Multi-point locking system
Popular Colours:
Bespoke Windows
- Available in high-performance uPVC or aluminium
- U-values as low as 0.8 W/m2K
- Multi-point locking system
Popular Colours:
uPVC Windows
- Robust and durable frames
- Available in seven styles
- 20 years life expectancy, maintenance free
Popular Colours:
Aluminium Windows
- Minimalist frames and sightlines
- Available in four styles
- Over 30 years life expectancy, minimal upkeep
Popular Colours:
Keyless and clueless?
Door prices, energy ratings, security features… in fact, everything you need to know to help you choose the best design for you and your home.
Charity & Community
Sash Window Project: SEH BAC completes successful renovation project at ...
Advice & Guidance
How can I make my Victorian house more energy efficient?
Advice & Guidance
Modern home improvements ideas to suit period homes!
Advice & Guidance
How do you replace windows in an old house?
Your Window and Door Journey with SEH BAC
Replacing your windows and doors is easy.
Choose the right windows and doors
Fill out a form online or visit one of our 10 showrooms to see our range of high-quality windows and doors up close and speak to our expert team for any advice on materials, styles, colours, energy efficiency and glazing. Once you are happy with your choice, we’ll provide you with a free no-obligation quote.
Place your order with us
When you want to go ahead with your order, the details have been approved, and we have received your order deposit, our administration team will provide your contract to a surveyor.
Your surveyor assessment
The surveyor will contact you to arrange a date that is convenient to come to your home and review the project scope, take accurate measurements and discuss any other matters that need to be considered. We will then confirm the surveyor’s assessment.
Confirm an installation date
Our installation department will contact you to arrange a date for your window and/or door installation and your products will be ordered and manufactured, using cutting-edge techniques and industry-leading materials.
You're ready for your installation
On the day, our skilled team will arrive at the agreed time to install your products, ensuring minimal disruption. They’ll explain the locking and opening systems and share maintenance tips to keep your products looking brand new. Once your installation is complete, we will contact you to confirm that everything has been finished.
FAQs
How to Get a Free Quote for Your uPVC Sash Windows Today?
Simply contact us today we’ll provide you with a detailed and accurate quote based on your specific requirements. Take the first step towards enhancing your home by requesting a no-obligation quote from us now. We are committed to transparent pricing and exceptional value.
What are uPVC sash windows and how do they differ from traditional sash windows?
uPVC sash windows are a modern alternative to traditional timber sash windows. Made from durable and low-maintenance unplasticized polyvinyl chloride (uPVC), they don't require painting or regular maintenance. In addition, uPVC sash windows offer better insulation and energy efficiency compared to their traditional counterparts.
Are there any maintenance requirements for uPVC sash windows?
Maintaining uPVC sash windows is easy. Regular cleaning with soapy water and a soft cloth keeps them looking great. Use silicone spray to lubricate moving parts for smooth operation. Check for damage and get repairs done promptly.
Why are uPVC Sash Windows a Cost-Effective Solution?
With durability, excellent insulation, and low maintenance requirements, they help reduce energy costs and save money in the long run. Compared to other materials, uPVC sash windows are affordable and come with a 30-year guarantee, making them a smart investment.
How much will new sliding sash windows cost?
Thermally sound, industry-accredited custom-made windows must be individually priced to take into account manufacturing to size and any features you wish to specify. We offer a range of finance options to spread the cost of new windows. You can read more about what affects the price of double glazed windows on our site.
Begin Your Project
Get your free quote – with no-obligation to buy. Simply fill in the online contact form below to get started:
Get inspired with our product brochures
Ready to make your dream home a reality but don’t know where to start? Find all the inspiration you need.
Download a brochure
Earn rewards when you recommend a friend
Recommend a friend and we’ll give you a free amazon voucher when that person places an order with us.
Recommend a friendMulti-award winning company
Here at SEH BAC, we’re proud to have won many prestigious awards for our products as well as our work in the community:
We’re one of the largest regional retail companies
Vetted for professionalism, competency & compliancy
What folks say about us
Astonishingly good or room for improvement, it’s all here. Thank you to all our customers old and new. We really appreciate your reviews. Really. Yes, really, really.
Our Accreditations
