What Is a Window Sash and Why Does It Matter?

What Is a Window Sash and Why Does It Matter?

Fixing windows could cost anywhere between $250 to $580 per window.

If you’re going to be spending that much for each window, you should know what the¬†window sash is and why it’s important to the window.

Thankfully, we have the perfect guide to fill you in on the importance of a window sash, so make sure you keep reading!

What is a Window Sash

What Is a Window Sash and Why Does It Matter?

A window sash is the part of the window that’s around the glass. It holds the glass into place in the frame. These sashes are normally movable, which will let the glass go up and down on the track. Some sashes don’t move at all.

You’ll find a lot of modern windows that have sashes. They can either be single-hung or double-hung. A single-hung window will only have one sash that moves and one that doesn’t.

If you have a double-hung window, both sashes will be movable. One sash will be above the other, and the lower one can still move parallel to the upper sash.

Some older windows have upper sashes that don’t move, but you can move the lower one. Newer windows are typically double-hung.

Different Types of Window Sash

Just like there are different types of windows, you can even have different sashes.

Three of the most common materials for sashes are aluminum, wood, or vinyl, but you can find many other materials as well.


You’ll normally find aluminum windows in older homes. These were very popular in the ’60s, but many homeowners soon realized that the aluminum would oxidize over time.

The material also sweats and leaves condensation in the pane of glass. If you like the look of this style, you’ll have to decide whether or not you’ll want to put in a little bit of extra maintenance to make sure they still look new.


Another common material in older homes was wood. However, these windows had problems when the wood would rot, shrink, or swell.

When this happens, it can make it hard to move the sash up or down.


If you love the look of wood but don’t want your windows to get stuck, you should go with vinyl! There are plenty of vinyl finishes that make the window look like it was made of wood without having to deal with any of the rotting or shrinking.

Vinyl windows can be built to fit your home, and they also help to reinforce the structure as well. Vinyl is also the best material to use to make sure that your windows are durable and energy-efficient.

If you’re going for a more modern look, there are also plenty of modern options to choose from.

Importance of a Window Sash

It’s important to have window sashes because they help to construct the window and then make it durable and structurally sound.

For example, if you’re using vinyl as a sash for your window, you have to make sure that there are multiple chambers in the vinyl. You also have to reinforce and fusion weld it so that it doesn’t lose its shape over time.

If a sash gets distorted, it won’t lock or open properly. It could also cause it to leak.

Window Sash Glazing

Another thing you’ll have to consider when getting a sash is whether or not you want double glazing.

This is an option that will help the energy efficiency of your window. It’s basically a window that has two panes of glass that are held in place by the sash. In between them, there will be an air pocket that will help to insulate your room better.

Sometimes these windows are also called double-paned windows.

Identify Problems

If you think you’re having problems with your sash, you’ll first have to figure out what the problem is.

If the window doesn’t open or close, you might have a problem with the alignment. You can usually fix this yourself, by trying to line the window up.

However, keep in mind that if your windows haven’t been replaced in a few years, you might want to buy new windows instead of repairing them. This will help to lower your energy bill and also keep your house’s curb appeal value up.

Fix Issues

If you can’t fix the issues on your own and don’t want to buy new windows, you can call a company like¬†Wandsworth Sash Windows.

If you have older sash windows, you’ll need someone to come out and do regular maintenance on them. Sometimes all you’ll need is a coat of paint, but sometimes you’ll need to readjust them.

If your sashes are old, you may be able to replace just the sash without having to replace the entire window. This is where you can decide if you want glazing on your sash or not.

However, if your sash breaks, you can go out and buy a replacement kit. This will make it easy to do it on your own, and you won’t have to replace the entire window. These kits should come with directions on how to replace the sash on your own!

Learn More About a Window Sash and Why It’s Important

These are only a few reasons why a window sash is important, but there are many more things to keep in mind!

We know that doing any type of home repair can be overwhelming, but we’re here to help you out.

If you enjoyed this article, make sure that you explore our website to find more articles just like this one!

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