How much sash weight

It may also occur if the size of the bricks reveal has limited the size available for the sash weight box. Blog About Us. Steel Sash Weights Originally created in order to replicate the more traditional cast iron weights, Steel weights are sold with a hole pre-cut in the top for the sash cord to be threaded through and a larger hole on the side of the weight to accommodate the knot.

Purchase suitable counterweights for the weight and thickness you have calculated. Choose counterweights that are long and slim in shape for sash windows that are taller than they are wide.

Choose the shortest, thickest counterweights that will fit the sash cavity for windows that are wider than they are tall.

This choice of shape allows a weight to drop the greatest distance possible in its cavity, so the windows open fully. If you replace the glass in an existing sash with thicker panes, this increases the weight of the panel and you will need to fit heavier counterweights. This often happens when you fit double-glazed sashes in place of old single glazing. The weights of glass panes per sqm are as follows; 2mm glass weighs 5 kg per m2.

The weights operate in channels inside the frame - the top sash weight channel is the outer one. Step two - Weigh the sash window. Step three - Replace the weights.

Step four - Reattach the window. An easy balancing act. The oldest surviving examples of sash windows were installed in England in the s, for example at Ham House. The invention of the sash window is sometimes credited, without conclusive evidence, to Robert Hooke. Others see the sash window as a Dutch invention. How does a sash window work?

In simple terms, a sash window consists of one or more movable panels or sashes, which form a basic frame to hold variable panes of glass. These all contribute to the unique look and aesthetic values of a sash window, whilst they also work in harmony to ensure that it moves freely and is fit for purpose.

Mighton also developed the format that lead sash weights are manufactured to today. Namely in mm lengths and six section sizes. Steel sash weights are a cheaper alternative to lead, however, sometimes lead needs to be used when there is not enough room in your box. Lead weights can easily be cut to size and have a hole running through the middle of the entire weight. When choosing sash weights for any window repair or renovation project we recommend that you check your box size first and make sure the weights you have selected fit.