Modern technology and craftsmanship means you get precise fitting vertical sash windows traditionally made by craftsmen.

Noise, weather and drafts are all reduced dramatically with our window.

The design sympathetically copies all dimensions of the traditional wooden windows making these beautifully slim.

4-16-4 K Glass

Box depths are traditional 135mm - This will not protrude into your room if replacing a traditional box.

Our design of timber box sash window copies, almost exactly, a traditional box sash, but will be double glazed to Part L standards.  All bars and meeting rails are exactly the same as the original.

The sealed unit has a 16mm air gap which complies with Part L, therefore we do not rely on argon gas, that may have a tendency to escape, which results in the window not complying with regulations.

Also as an added feature the beauty of natural wood in a slim design means you can fit our ‘sashes only’ into an existing box frame.  “Amazing” but true.

Our Sashes only

Still complying with the Part L regulations our sashes will fit into your existing frame.

Enabling you to upgrade your window to double glazed without the necessity and costs of ripping out your old box, should it still be in good condition.

This is unique to us - all other companies double glazed sashes are 57mm wide, ours are 45mm.

Our prices are Trade prices for both the trade and private/domestic customers.

Factory visits are welcome, so please feel free to make an appointment.

Tel: 01737 826700 Fax: 01737 826800

Email: sales@box-sash.co.uk