Sash Windows

When you choose John Williams sash windows you choose a whole lot more than chic and style. We use the highest quality advanced technology glass that minimises draughts and heat loss, so you make your home snug and warm - thereby reducing your energy bills.

Security is paramount, too, and our sash windows have corrosion-resistant multi-point locking for added security. In addition the glazing is fitted from the inside, making your home safe and secure.

Your sash windows not only enhance the appearance of your home but the technology is designed to minimise external sound, making your home peaceful no matter what the noise around it.

What?s more our double-glazed sash windows don't rot, flake rust or fade, leaving you more time to enjoy them!

Don?t forget that modern, high-quality replacement windows add value to your property as well as enriching it with beautiful designs.

And remember that John Williams has a dedicated design team to help you tailor-make windows that cater to your taste and match the style and character of your home.

All this and the peace of mind that comes from knowing the windows are guaranteed for 10 years.

From the products we manufacture to the installation and customer services we provide, quality remains the hallmark of John Williams.

We remain one of the few companies to hold the British Standards Institution award for manufacture and customer care.

For even greater assurance, we hold no fewer than four Kitemarks - nationally recognised seals of approval - for the quality of our products and their excellent energy ratings.

And as a member of FENSA, you are safe in the knowledge that our replacement windows and doors comply with the current Building Regulations for both England and Wales.

With our products made, supplied and fitted using in-house resources, we operate stringent quality control and testing at every stage.

In this way, John Williams can maintain such high standards, and reward our customers with the very best service.

Choose a sash window colour that blends and enhances your home...

When you choose the coloured UPVC for your John Williams sash windows you can create something with your own stamp of individuality and style.

We appreciate how important it is to get the right design for you and that’s why we offer a professional custom-made design service so you only get the best quality coloured UPVC double-glazing sash windows available.

We offer a range of UPVC timber alternatives, resistant to rotting and splitting, and at lower cost to many wood alternatives. What’s more, we offer an extensive range of colours as well as brilliant white. Choose a colour that picks out and augments the existing colours in your home and select from a range of authentic grain finishes.

See what a difference John Williams coloured double-glazing sash windows will make to your home!

As beautiful as John Williams sash windows look, we understand that security is also a major consideration for you. That’s why we guarantee our UPVC casement sash windows meet all British standards for security.

We use multi-point locking systems.

Add laminated glass if you wish, to create another layer of security. We fit discreet glazing beads on the internal window that stops intruders being able to prise entry. We can fit stainless steel multi-point locks and locks on window arms, too.

Because John Williams manufactures all products, we give you the assurance that our double-glazed sash windows are thoroughly tested to make sure they can withstand burglaries.

You can enjoy your new sash windows with total peace of mind.

THE JOHN WILLIAMS 10-YEAR GUARANTEE

The John Williams unique, no quibble guarantee has always been part of our service. Our comprehensive 10-year guarantee on products and installation goes on looking after you and your home in the years ahead, affording you lasting peace of mind.