The sash weight of windows is of very special importance, because its height has a decisive influence on the drive.

But first to the definition: the window sash is the movable part of a window. Usually to rotate or tilt, in the living area often a combination of these (turn/tilt hardware). Quite the opposite of the frame, which refers to the window frame built into the wall.

In principle, the sash consists of three components:

Sash frame

The sash frame forms the element encompassing the glass and is usually made of plastic, wood or aluminum. Plastic windows have hollow chambers for thermal insulation and have steel reinforcement inside. There are also mixed forms, for example wooden windows with aluminum facing on one side.

Glazing

The glass used to be a single 3-4mm thick pane (single glazing), but this has been replaced by double glazing ("insulating glass"), but the current standard in new construction is triple glazing. The pane is built up in layers, so to speak. One layer of glass, one layer of inert gas, another layer of glass...

Common glass constructions are for example 4/16/4, i.e. 4mm glass / 16mm space between panes / 4mm glass (double glazing) or 4/12/4/12/4 (triple glazing)

Fitting

Refers to all parts that cause the movement of the sash. For example, turning handle, locks, catch scissors, hinges.

Sash weight

But how can the sash weight be determined? Well, ideally, you remove the sash and place it on the scale. A bathroom scale should be enough in most cases.

Of course, you can also contact the window supplier and ask for the sash weight.

Provided you know the glass construction or who to call to get this information, you can also get the sash weight relatively accurately by calculation. The most important information for this purpose: one square meter of glass with a thickness of 1mm weighs 2.5kg on our planet ;)

The calculation formula is quite simple:

Sash width incl. frame in meters

Sash height incl. frame in meters

Glass thickness: Simply add the individual glass thicknesses (4 + 4mm or 4 + 4 + 4mm). Please insert in millimeters