Wood sash windows


Replacement timber window and door specialists. Manufacturing and installing bespoke wooden windows and doors.

At The Sash WindowWhich? Trusted Trader Workshop all our windows and doors are bespoke and manufactured in-house at our workshops in Berkshire, ensuring that our products are manufactured to the highest standards.


Our materials are selected to provide a high quality, beautiful product to suit your home. We recommend manufacturing your windows and doors in Accoya™ or hardwood, which has high durability and a longer life span.

For properties in London and Southern England, we can provide a supply and fit replacement service. Established in 1994, we have extensive experience working in homes and commercial properties across London, Bedfordshire, Berkshire, Buckinghamshire, Essex, Hampshire, Hertfordshire, Kent, Oxfordshire, Sussex, Surrey and Wiltshire. We also provide a supply only service of new timber windows and doors across the UK.


We offer a range of bespoke sash windows, including cord hung, spiral hung and fixed windows. The majority of our replacement wooden sash windows are double glazed, but we can also manufacture single glazed windows if required for listed building requirements.
Accoya sash windows
Bespoke casement windows Buckinghamshire


All our replacement casement windows are bespoke and designed to be as energy efficient as possible. The majority of casement windows that we manufacture are double glazed, but we can also make single glazed windows if required for listed building requirements.


Our external French doors are designed to be sympathetic to your property. The majority of our new wooden doors are double glazed, but we can also manufacture single glazed doors if required.

External timber doorset
High quality front door


Our Front doors are all bespoke and crafted in our workshop. We have experience manufacturing and installing Front doors on a range of period homes, including Georgian, Victorian, Edwardian and 1920s/1930s properties.


Our external timber sliding and bi-fold doors help open up your home to the outdoors, allowing you to benefit from larger entertaining space in the summer months.  New doors are designed to complement your home.

Accoya BiFold Door
casement secondary glazing


Our secondary glazing service is popular in listed buildings, where double glazing may not be permitted. All our secondary glazing is bespoke and can be manufactured to match your existing windows.

New Sashes into Existing Window Frames

If your window frames are still in a good condition, but the moving parts require replacement, we can manufacture and install new sashes into the existing window frame. This is not only saves you money, but also minimises disruption to your home.

Unsure what type of windows you have? Sash windows slide up and/or down to open, whereas casement windows open on hinges, like a door.
To view examples of our previous work, view our gallery pages.