Charterhouse School in Godalming, Surrey


Our team at Timbawood worked on the heritage sash windows and casement windows at Charterhouse School in Godalming, Surrey, founded in 1611 and one of the UK’s leading independent boarding schools.

During this project, we delivered a combination of services, including new timber sashes and casements fitted to the existing window frames, and exact-match full replacement sash windows and casement windows. These bespoke timber windows were handmade in our West London workshop with Accoya timber, our first choice of timber because of its remarkable durability and stability, even in wet conditions.

We also used our ‘4/6/4’ 14mm slimline double glazing, an effective solution for heritage buildings as it looks very similar to single glazing. The advantage of using such slim double glazing is that we can also keep the section sizes and glazing bars of the window itself very slim, to give an authentic heritage look that replicates the original design of the windows whilst also adding the thermal efficiency and energy saving advantages of double glazing. Slimline double glazing is filled with specialist gas such as Krypton, which is a dense inert gas and more energy efficient than more standard gases such as Argon or even normal air.

Part of our restoration and conservation work at Charterhouse School involved designing a ‘concealed trickle vent’ solution. Trickle vents are a requirement for new windows to allow for ventilation when the window is closed. Standard trickle vents are made of plastic and not particularly attractive, especially on otherwise elegant heritage windows. They can look out of place on heritage and listed buildings and prevent the preservation of British architecture across different periods

Our CAD designers at Timbawood came up with an innovative solution that involves using the box frame rather than the sash itself to create a vent, which has proved a popular, more discreet option for this and many of our other heritage projects.

This customisation and ability to design bespoke features of any sash or casement windows and heritage doors from our London workshop is, what we feel, makes our service unique.

Here at Timbawood, we are proud of our role in helping to preserve and restore the heritage, listed and conservation buildings like Charterhouse School amongst other prestigious schools in London and the South East. By preserving the original design of the windows while upgrading their performance, we hope to provide students with a more comfortable learning environment that they can appreciate and be proud of.

We believe that the preservation of such buildings’ original features is beneficial for the education of the students as well as preserving the local history. Take a look at our blog post if you would like to read more about why we think preserving heritage buildings is so important for Education.


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