Sash Windows
Sash windows are a timeless choice that keep your home warm, secure, and full of traditional character. Our made-to-measure sash windows are available in both double and triple glazing options, offering excellent insulation while preserving their classic appearance.
Crafted in high-quality timber or low-maintenance uPVC, our sash windows can achieve A and A+ energy ratings depending on your chosen glazing specification. Whether you select double glazing for cost-effective efficiency or triple glazing for enhanced thermal performance and noise reduction, you’ll enjoy year-round comfort.
What are Sash windows?
Sash windows are made up of two glazed panels, known as sashes, and are available in either single-hung or double-hung designs. They slide smoothly up and down on a vertical track — with single-hung windows featuring one moving sash, while double-hung windows allow both sashes to move for improved ventilation and flexibility. Available in both double and triple glazing options, our sliding sash windows combine traditional design with modern energy efficiency. Depending on your chosen glazing specification, you’ll benefit from improved insulation, reduced heat loss, and enhanced noise reduction. For added convenience, our sliding sash windows can also tilt inwards, making them easy to clean safely from inside your home.
Sash Window Materials
Our sash window materials have a wide range of custom colours and design features, so you can create the perfect look and style for your home.
uPVC Sash
Wooden Sash
Warmer Home, Lower Bills
Double glazed sash windows help keep the heat in your home with thermal inserts to stop warm air escaping, and high-performance pile weather seals to reduce draughts.
Perfect for Conservation Areas
Customisable features like Georgian bars, decorative horns and heritage-style window furniture mean our Elite sash windows are easily tailored for homes in conservation areas.
Open with Ease
Perfectly counterbalanced through a system of hidden runners and springs, the internal open and close mechanism makes operating sliding sash windows smooth and easy.
Modern Security Features
Key-operated cam locks and limit stops are standard on our sliding sash windows. Security bars and reinforced sashes further prevent intruders.
Add Value to Your Home
Modern double-glazed sash windows increase the energy performance and look of your home, making them a good long-term investment.
Sash Window Details
Sash Window Colours
Create the perfect sash windows with a choice of classic colours to complement period properties, or opt for bold shades to add a fresh, modern touch to any home. Our uPVC sash windows are available in a selection of 8 colours, offered in both smooth and realistic woodgrain finishes. For a more bespoke look, our timber sash windows come in 9 standard colours, along with an extensive range of over 200 RAL colour options — giving you complete design flexibility.
Sash Window Glass
Enhance your sash windows with our range of decorative and functional glazing options. Whether you’re looking to add privacy or create a standout feature, we offer designs to suit every style of home.
Choose from classic diamond leaded patterns or elegant brilliant cut designs to create a stunning bay sash window. For added privacy, obscure glass is ideal for bathrooms, while bespoke coloured glass options bring a unique, traditional touch to period properties.
Sash Window Furniture
Complete the look of your sash windows with our range of high-quality hardware, including handles, locks, sash lifts, pulls, knobs, and decorative horns. Every detail is designed to enhance both the appearance and functionality of your windows.
Choose from a selection of finishes, including white, chrome, and gold, to perfectly match your uPVC or timber sash windows. Opt for gold fittings to achieve a classic and traditional feel.
At Khan Fix Glazing, we specialise in replacing windows for period and traditional properties across the UK. Whether you’re renovating your home or upgrading your existing windows, we deliver the classic look you want — combined with modern standards of energy efficiency, durability, and security.
Our sash windows are expertly crafted and professionally installed to ensure long-lasting performance. For your peace of mind, we provide comprehensive guarantees, including a 10-year guarantee on window frames covering materials, parts, and labour, along with 10–15 year guarantees on sealed glazed units.
Customer Reviews
Guaranteed Quality
Made to Measure
Home Improvement Provider
Want to Speak To An Advisor?
Give our team a call on 07404029382
Explore Similar Products
Bay Windows
Tilt and Turn
Flush Windows
Shaped Windows
Your Questions on Sash Windows Answered by Us
Can you double glaze existing sash windows?
It is not possible to double glaze existing single glazed sash windows. You can upgrade your existing single glazed sliding sash windows to Anglian double glazed sash windows. If you are looking to increase your window energy performance and are looking for a more affordable way to do so, then secondary glazing is a good option. Secondary glazing fits behind your existing sash windows, providing extra warmth and sound insulation.
Can you insulate sash windows?
The best way to insulate sash windows is with cost-effective secondary glazing. However, if your windows have seen better days and are draughty, it might be time to consider new double glazed A-rated uPVC sash windows to improve your window energy performance.
What are timber sash windows made from?
Timber sash windows can be made from softwood or hardwood. We have a choice of both hardwood and softwood available, made from FSC®-certified and other controlled material. The FSC® label means that wood used for timber sash windows have been responsibly sourced. The timber is weather-sealed and has a 30-year guarantee against rot and fungal attack.
How do you measure up for sash replacement windows?
To measure up for replacement sash windows, you need to measure the sash window width and height, as well as the box frame width and height (the size of the hole in which the window is set). Our sliding sash windows are custom made to fir your home, contact us to book a free remote quotation today.
Can you soundproof sash windows?
Yes, the best way to soundproof sash windows is with secondary glazing. However, brand new windows with a higher energy rating tend to also be a significant upgrade from single glazed sliding sash windows for reducing noise. If you’re not sure which option is right for you, please talk to our team and we’ll be happy to explain the differences and benefits.
What are the cost benefits of sash windows?
Replacing older sash windows with modern double-glazed sash windows will help increase the energy efficiency of your home, helping to reduce heating bills. Sash windows also look fantastic, adding to the attractiveness of a property and potentially increasing its value.