What is a window sash?

Window Sash

If you are not familiar with the design and functionality of your homes windows then you might be confused when it comes time to repair or update them.

What is a window sash?

A window sash is the part of the window that holds the glass and the framework around the glass to keep it in place. Window sashes are fitted into the window frame.

Importance of a window sash

Window sashes are very important to the overall construction and durability of the window. It is crucial that vinyl window sashes are multi-chambered and reinforced so they don’t distort over time.

Understanding sash windows – the individual parts

There are various parts that make up a sash window and keep it working as it should.

They give this type of window its distinctive appearance, as well as making sure it is thermally efficient and will open and close as needed.

These are the main components that make up a traditional, weights and cords sash window:

  • Sash, or sashes. There will usually be two sashes, which are the frames that contain the glass. They are movable to allow you to open the window.
  • Box frame. This is the window frame that contains the sashes.
  • Sash cord. The cord is attached to the side of the sash and is fed through a pulley. It is also attached to the sash weight inside the box frame.
  • Sash weight. The purpose of the weight is to counterbalance the sash to allow the window to open. It will weigh the same as the sash, and will be made from steel, cast iron or lead.
  • Staff bead. A staff bead is an internal trim that sits around the box frame. Its purpose is to keep the sashes in position within their frame. Often, when you have a newer staff bead, it will also contain a draught seal.
  • Parting bead. This is a vertical seal that is fitted into the box frame and creates a channel for the top and bottom sashes. As with the staff bead, when you have a newer parting bead, it will often contain a draught seal.

What are some of the issues that can happen with different types of window sashes.

Wood Windows

Older homes with wood windows are often plagued with problems like wood swelling, rotting or shrinking. This can cause the window to be difficult to move up and down. With the latest technology in vinyl windows, however, homeowners can now enjoy the look of traditional wood windows without the problems associated with wood.

Aluminum Windows

Many older homes have aluminum windows. These were popular particularly during the 1960s, but many homeowners encountered problems when the aluminum oxidized. Aluminum also promotes sweating and condensation inside the panes of glass. Today’s vinyl windows are far superior, as they are tough enough to withstand all types of weather, including the sun’s heat.

Vinyl Windows

Though replacement window sashes can be a temporary fix, installing brand new energy-efficient windows will offer the best performance in the long run. Typically, the custom-milled sash design offers a precise fit and is often 100% maintenance free.

It is important to work with a reputable company such as True Blue Glass who can provide free quotes to replace your windows.