Sliding Sash Windows

Sliding Sash Windows

Sliding sash windows are well suited to period properties. Traditional style coupled with modern engineering, timber sash windows are the perfect home improvement for properties in conservation areas.

We also supply and install the Residence Collection which includes the R9 range, for those looking for traditional style with the perks of uPVC and double or triple glazing.

  • TrustMark Endorsed
  • Insurance Backed
  • Federation Of Master Builders
  • FENSA Registered
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vertical sliders

Beautiful Period Charm

Sliding sash windows are a traditional style of window suited to period homes. Authentic traditional style and modern engineering make the latest timber sliding sash windows are the ideal choice for properties in conservation areas.

Best Glaze LTD uPVC vertical sliding sash windows have the look of timber thanks to an authentic woodgrain finish with none of required for timber.

As well as looking like real wood , our uPVC sliding sash windows are A rated for energy efficiency and could save you money on heating bills.

Choose the style that suits you

Our sliding sash windows are fully customisable, you can choose a style that suits you and your home. Each window is made bespoke for you, choosing flourishes will ensure they meet your exacting needs.

Choice of colours

Choose from a stunning range of colours and even finishes such as woodgrain or flat on our uPVC, which have the aesthetics of real wood but the benefits of modern technology and thermal efficiency. Mix it up with two colours, white inside and a second colour on the outside, matched perfectly to your home.

double glazing colours
Bespoke colours can be provided, get in touch for more details.
Window Hardware To Suit Your Style

All Harware is available in White, Gold or Chrome.

Window hardware
pole eyes

Pole Eyes

Pole eyes are used for opening and closing the top sliding sash window, a choice of one or two are available. Larger windows come with two as standard.

Tilt Knob

Tilt Knob

Used to open sliding sashes inwards for easy cleaning from inside the home. Two Tilt Knobs also lock the sash back in the upright position.

sash lift

Sash Lifter

Used for opening and closing the bottom sliding sash window. Choice of one or two lifters on smaller windows, larger windows has two as standard.

sash lock

Sash Locks

Lockable sash locks keep the sliding sashes locked together safely and securely. Choice of one or two on smaller windows, two on larger windows as standard.


Travel Restrictors

These restrictors stop the sliding sash windows opening past 100mm for enhanced security and safety. Perfect for those with pets or children.

d handle


These ergonomically shaped handles can be installed instead of pole eyes or sash lifts. These D-shaped handles can be fitted internally.

External Styling – Sash Horns

On the top sash of vertical sliding sash windows is a flourish known as the horn, this is found on the bottom of the top sash and is purely decorative.

Choose from Plant-On horns and Run-through horns. Through horns create the authentic aesthetic of ‘real timber’ sliding sash windows.

external flourishes

Georgian & Astragal Bars

All of our uPVC Vertical sliding sash windows have options such as the astragal and Georgian bars which create an authentic aesthetic of period windows.

Sliding Sash Windows

Why Choose A Vertical Sliding Sash Window

Traditional sliding sash windows design is as popular today as it was centuries ago. Our sliding sash windows have maintained the characteristic deep bottom rail and of course the Georgian bars keeping an authentic look.

Sliding sash windows are easy to operate, can be cleaned easily and safely from inside the home. Because a sliding sash window can be opened either at the top or the bottom, purge ventilation can be achieved safely and securely.

Vertical sliding sash windows

Simple, Easy To Operate Sliding Sash Window

Traditional sliding sash windows were often draughty and difficult to operate due to warping or a build up of paint over many years.

Our Sliding sash windows are easy to operate, thanks to anti warping design and spiral balanced spring openers which can be adjusted to suit.

Our timber windows come with traditional style weights which are perfectly balanced to the sashes, ensuring effortless opening at all times.

Anthracite Windows, Doors and Conservatories Cornwall

Why Choose Best Glaze For Sliding Sash Windows

Best Glaze LTD is a friendly family run business based near Newquay In Cornwall. We have over 20 years of experience installing quality uPVC, Timber and aluminium products throughout Cornwall.

We do not sub-contract out work out, we do not employ any pushy sales people and we will not sell you something that you do not need or is not suitable for your requirements.

Our ethos is simple, we believe in honesty and integrity being the best way to build close working relationships with all of our customers

What Our Customers Say About Us

Our reputation is important to us, as a local company based in Cornwall we strive to achieve 100% customer satisfaction on every home improvement project.

We also offer window repair services. If your windows have suffered damage, then we can fix them for you in no time. Replacement handles, hinges, and seals are all available for most common windows, including double glazed windows. Visit our window repair page for more details.

About Us


We have been installing Windows, Doors & Conservatories in Cornwall for over 20 years, we are a local, family run business offering quality uPVC products from our family to yours in Cornwall. We offer unbeatable value and an outstanding finish on all of our work.

North Cornwall




  • Redruth
  • Cambourne
  • Helston



Can you get double glazed sliding sash windows?

Vertical sliders

Double glazed sash windows are the perfect choice for properties situated in conservation areas or for homeowners that want to keep the authentic look and feel of a period home but with the benefits of modern double glazing. You can choose between authentic double glazed timber sash windows or opt for a maintenance free uPVC vertical sliding window with a woodgrain finish.

Which part of a window is the sash part?

The sash part of a window is the part that opens. Window sashes are integral to the overall construction of the window it prevents draughts and water ingress.

Whats the difference between sliding sash windows and casement windows?

The main difference between a sliding sash window and a casement is that sliding sash windows open vertically whilst casement windows usually open out.