Do you know how to identify the key parts of a sash window?

Sash windows look fantastic and are one of the best features for period properties. However, they are more complex than modern casement windows. Crucially, there are way more parts to think about. It can make it confusing to determine what kind of repairs they may need. We want to provide some advice here so you know about the different key parts of sashes. Then, if you need services like sash window restoration in Northumberland, you will be in a better position to tell us what is wrong.

Box frame

Firstly, sash windows will have an outside frame. Just think of it as the outside box that holds everything. Generally they will be timber. In some cases they will be thin to save space and create more elegant lines.

External sill

One of the most interesting parts of the sash windows is the exterior sill. The frames sit on this. It has an angled or curving section at the bottom to allow water to run off without impeding it. Interestingly, many sashes don’t have an internal sill. Those that do, generally it is not part of the frame.

Sashes

Next, you have the actual sashes themselves. These are frames that sit within the outer box and contain the glass panes. The best way to identify them is they are the main moving part of the window. However, the designs can differ massively. Some windows will have a fixed upper sash so you can only move the lower one. Others are double hung, meaning you can move the top and bottom sash. Speak to us about sash window restoration in Northumberland.

Glazing bars

Sash window restoration NorthumberlandSome sash windows will be large, individual panes of glass. However, this is often a sign that they are newer. There are even some with glazing bars to mimic traditional designs, but they are purely decorative. Older sashes feature smaller panes of glass with vertical and horizontal glazing bars to separate and hold them. During the Victorian and Georgian periods manufacturers could not produce large pieces of glass. So, the strategy was to create smaller ones and lay the windows out in a grid pattern, generally like 3×3.

Parting bead

This is one of the most important parts of a sash window. It creates separation between the top and bottom sashes, ensuring they won’t come together when they move.

Staff bead

Around the inside face of the box frames you will find pieces of trim. These staff beads keep the sashes in place, preventing them from wandering or even being pushed out of the frame.

Cords and weights

The final thing to look at is the sash cords and weights. The latter will be within channels in the box frame. A cord links them to the sashes via a pulley. The idea is the weight balances with the sash, allowing it remain in place when you open or close it.

Ask the experts for help with sash window restoration in Northumberland

Now you know a little more about the various key parts of a sash window, it should be easier to see if there are issues with any of them. You can look for problems like warping, cracks, peeling paint, rot, and more. Broken cords are a common problem; the cords can last 10-20 years or longer depending on the materials, usage, and upkeep. If they break, it becomes impossible to use the windows.

If you do have issues with sashes and want professional help to restore them, we can provide the best quality services. David Humble can save all kind sash windows, including ones with significant damage. We can tackle problems with the timber, glass, cords, weights, and more. We can even paint them to a high standard.

So, if you want sash window restoration in Northumberland, talk to us.