Box Sash Windows

Spot The difference: Windows above are ours.

Windows below are original

(Regents Park London - click above for larger pic)

Our Speciality Window

At United Windows, we have refined the sliding sash to make it technically superior to its predecessor and virtually draught free.

The modern sliding sash can be double glazed. In some cases, it might be necessary to replace lead weights with adjustable balanced spring counterweights (spiral balance). This is because the larger weights which would be required, could restrict sash movement.

Box sashes are usually made in high grade treated softwood but can be made in hardwood if desired. (See History)

If your weight box surrounds are still sound, it is possible to make new double glazed sashes to be fitted into them.

Glazing Bars (Astragals)

If individual double glazed units are used, the glazing bars (Georgian in the top two pictures) are wider than traditional in order to hide the hot-melt border around a double glazed unit.

If this concerns you, we also make a 'duplex' system where a single double glazed unit is used and narrow bars are fitted to the glass both outside and inside.

Traditional single glazing  bars are used where single glazing is required or listing demands it

Please click the glazing bars button below for more information.

And for the standard bar layouts, click below

For a brief history of the box sash window, please click here

For information on the timbers we use, click on the button below

For more details of the various parts of a box sash window, please click here

For the technically minded click here for a cross section drawing & catch details

.It is possible to have the sashes tilting as well as the normal operation. Click here for more information

.....and for further photos of work we have done around the country

But!, we still make exact duplicates of existing windows where listing or preference demands it. (see left)

BENEFITS OF THE FAIRMITRE BOX SASH WINDOW:

• Greater creative freedom, especially in historic buildings.
• The old style of window profile can be retained even when using the most modern fairmitre technology.

MAKE UP

TREATMENT: Protim 800c

TIMBER: In accordance with B.S. Specification.

GASKET: Reddiseal

GLUE: Borden U.K. Ltd.

REBATE: 32mm x 15mm for 16mm double glazed unit.

Weight or spring balances.

Wide choice of quality natural wood, ranging from Scandinavian Pine to hardwoods, harvested from well-managed forests.

Highly flexible system providing a quality solution for all your needs.

United Windows reserve the right to alter or modify technical specifications due to continuous development and improvement without prior notice.

Website design by Nigel Haffner