Aluminium Windows

Sash Windows

A sash window is one with two frames that can both slide vertically, thus allowing for greater airflow. The sash itself is composed of panels of glass, individually called lights. The traditional sash window is made of multiple square lights held together by a grid of bars. A sash is technically the frame that holds the pieces of the window together as a single component. As opposed to a window in which the frame is built into the wall, the sash makes the glass independent of the wall and lets it move. you can be sure that your new windows will make your home complete.

Flush Casement Windows colour visualiser

Finding the perfect colour for your uPVC windows can be hard, but with our interactive coloured window selector tool below you can see what your new windows could look like in any of our ten colour offering

RAL*
White
Anthracite Grey
Chocolate Brown
Jet Black
Light Grey
Sienna Brown
Slate Grey
Dark Slate
Dim Grey

Innovative, Smooth and Functional

We've designed our Legacy™ Sash windows with a clever balance mechanism for an easy, smooth operation. No old box sash, no cords and no weights for a simpler smoother glide. Both sashes adjust separately or can be opened together and both feature an innovative tilt mechanism, allowing the glass to be tilted inwards for ventilation or cleaning. Our uPVC sliding sash windows open smoothly, with ease using a smart balance mechanism so you've no need to worry about snagging cords or jammed pulleys. They also meet the fire safety 'means of escape' requirements in case of emergency.

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High quality windows can prevent interiors from being too cold or overheating…

An important consideration when choosing windows is insulation. Windows with poor frames or weak glazing often make homes more difficult to heat, as warmth escapes out through them. Our Envisage flush windows have an innovative coating in the glass to prevent this.

Legacy™ Sash Window Benefits

Precision Icon
Precision made-to-measure
We custom make each of our Legacy™ sash windows to suit your home for an air-tight seal and better security.
Box Sash
We remove the old box sash
For a secure and energy efficient fix to your brickwork.
Secure Design
Safe and secure design
Enhanced security that meets BM Trada Q-Mark certification.
Weather Performance
Weather performance
Double stepped frame and triple brush pile weather seals give outstanding performance for weather tightness.
Energy Efficiency
A-rated energy efficient
Ensures maximum heat retention and minimum heat loss.
Expert Fitters
Expert fitters
We have hundreds of experienced fitting teams throughout the country.
Environmentally Friendly
Environmentally friendly
We remove your old windows and recycle 95% of all our waste.
Trusted Rated
Trusted and rated
89% of customers who reviewed us say they would recommend us.
10 Year Guarantee
10 Year Guarantee
We promise you'll get a decade of virtually maintenance-free pleasure from your Safestyle uPVC window.
Price Promise
Price promise
With our lowest price guarantee we’ll beat any like-for-like quote.

Sash Window FAQs

If you are looking to double glaze existing sash windows and are looking for a more affordable option, then we'd suggest considering secondary double glazing. Secondary double glazing fits over your existing sash windows, providing extra warmth and sound insulation.

Aluminium windows have a thermal break to improve heat gain and heat loss by up to 60%. Combined with the insulating properties of large panes of glass and insulated frames, this technology helps save money on your heating bills.

You can insulate sash windows 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 sash windows to improve your window insultation.

Timber sash windows can be made from softwood or hardwood. We offer a choice of both, sustainably sourced from the Forest Stewardship Council (FSC). The timber is weather-sealed, which means it won't rot, warp or shrink.

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). London Domestic Windows replacement sash windows are custom made to fit your home, fill in the form on our website and we'll send a member of the team out to measure up for you

Yes, secondary glazing will provide your existing sash windows with additional soundproofing. However, windows with a higher energy rating tend to also come with better soundproofing. 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.