Box Sash Window: Classic London

Specifications

While every window is made bespoke, these are the core specification areas worth considering before finalising your project.

Glazing

Box Sash Classic frames accommodate the following glazing units, depending on sash depth:

50mm Vacuum glass – 20mm DGU
56mm Vacuum glass – 24mm DGU
73mm 40mm triple glazed

A range of glazing specifications is available to suit thermal, acoustic and visual requirements.

Refer to our Design Guide for further information, or contact our team to determine the most appropriate solution for your project.

Timber

Our sash windows are manufactured from premium, sustainably sourced timber, including pine, sapele, European oak, Accoya, and engineered hardwoods such as Red Grandis.

Additional timber species can be sourced for bespoke applications, subject to availability and suitability.

Refer to our Design Guide for further information on timber specification options.

Trickle vents

Where required, trickle vents are fully concealed through the head of the frame.

They are invisible on both the internal and external faces of the product.

Concealed Trickle Vent

Finish

We offer an extensive range of stains and colours, including any shade from popular paint ranges.

If you have a specific colour in mind, we can match it.

Take a look at our Design Guide for further information.

Paint Colours

Stain Colours

Ironmongery

Working closely with leading component manufacturers, we carefully select high-quality hardware that delivers both excellent performance and refined detailing.

Take a look at our Design Guide for our full standard catalogue.

If you have a particular product in mind that is not covered in our ranges, please let us know and we can check compatibility.

A PAS24-tested window is available, compliant with Part Q of the Building Regulations.

Enquire for further details on ironmongery and certification.