What is a Window Sash and Why is it Important?

Your windows are such a vital feature on your home so it’s important to know as much about them as possible. Knowing the components of your windows, such as the window sash, will help you stay up to date on them and you’ll be able spot any mishaps early.

what is a window sash

Plus, the more you know about your windows, the better you’ll be able to make decisions when it comes to repairing or replacing them. The window sash is one of the most important aspects of your windows.

What is a window sash and why is it important? We’ll go over everything you need to know about window sashes in this article.

What is a Window Sash?

First thing’s first, what’s a window sash? In simplest terms, the sash is the section of the window that opens and closes. Depending on the type of window, there could be more than one window sash that’s operable.

You might be wondering what makes up the window sashes? Typically, the window sash has a very basic design and structure.

The overall sash is a frame that’s designed to be easily placed inside the entire window casement. Within the sash frame, there’s the window glass along with any framework that your window may have such as grids.

The sash locks into the window frame on a set of runners that allows it to be moved up and down.

The frame of the window sash usually features a locking system for added safety and security.

Why Are Window Sashes Important?

Window sashes are a crucial element to the overall performance and durability of your windows. If your window sash isn’t working properly, that’ll lead to a multitude of problems such as drafts and leaks.

It’s also important that your window sashes are in good working condition because if they’re not, opening and closing your windows will become a pain.

That being said, it’s pretty easy to tell when your window sashes are damaged or broken. If your window is hard to open and close and it sticks along the tracks, that could mean you have an alignment problem.

Fixing an alignment problem can be done, but if it’s is really bad and continues to happen, then you should consider replacing your windows.

Another reason why you need to make sure the sashes are working properly is for safety and security reasons. If the locks are worn out or broken, that poses a major security threat. Anyone can then break into your home with ease.

Also, if you have children and your sash locks don’t work, they can easily open the windows which is unsafe.

The Different Types of Window Sashes

window sash

Not all windows have the same window sashes. Depending on the style of window you have, the window sash or sashes are constructed differently.

For example, double hung windows feature two operating sashes that slide up and down and are very easy to use and clean. You can simply tilt them in to make sure you cover everything while cleaning them.

On sliding windows, the sashes open and close horizontally. Sliding windows are basically the same as double hung, just flipped horizontally.

A casement window sash is a bit different than the traditional sash. Casement windows operate on a crank and open outward to the left or right. The sash is connected to the crank system as opposed to being in the frame along a track.

Awning and hopper windows also have one sash that’s operable. Awning windows are hinged at the top and the sash opens outwards with a crank. Hopper windows are hinged at the bottom and the sash tilts open inwards.

What to Look For in a Window Sash

Being such a key component of the overall structure and integrity of the window, it’s important to make sure your window sashes are well-constructed.

Living in the Midwest, you know the weather extremes that occur throughout the year. Your windows play a major role in keeping your home comfortable year round.

You’ll want to stay away from windows that have wood or aluminum sashes. Wood is extremely susceptible to rotting, warping and expanding and aluminum isn’t cut out for the Midwest weather as it doesn’t react well to extreme weather conditions.

If you do have wood or aluminum windows and they’re out of shape, replacing them immediately is your best option to maintain an energy efficient home.

When it’s time to replace your windows, vinyl is the way to go. Vinyl windows are energy efficient and extremely durable. They’re perfect for homes in the Midwest because they’ll never warp, rot, crack or expand.

Also, be sure the sashes of your new windows have fiberglass reinforced frames and are foam insulated.

For the Best Window Sashes, Trust Feldco

If you find that your window sashes aren’t working as they should be and they’re beyond repair, you can trust Feldco for all your window replacement needs.

Our vinyl windows are extremely energy efficient with foam insulated frames and sashes as well as double or triple pane glass.

We’ve served over 400,000 homeowners in the Midwest so it’s no surprise why we’re named America’s #1 window and door company. You can get started on your window replacement project today with a free quote online.

Share this article:


Get started with

*View our privacy policy

Or call us at 1-866-4FELDCO®
or visit one of our locations.


remodeling after kids leave for college

Empty Nest Makeover: Redecorating After Kids Leave for College

The Empty Nest Makeover: A Guide to Redecorating After Kids ...
installing roof vents

Step-by-step Guide: Installing A Plumbing Vent Through Your Roof

Step-by-Step Guide to Installing a Plumbing Vent Through Your Roof ...
young woman cleaning her front door

How to Clean Your Entry Door

How to Clean Your Entry Door: A Step-by-Step Guide for ...
Sliding Patio Doors

Why Patio Doors Drop and How to Fix Them

Why Your Patio Door Drops & How to Fix It ...
fiberglass front entry door security

How are front doors made? A Detailed Look into Exterior Doors

How are front doors made? The front door is not ...

Book Today and Save!

Over 500,000 homeowners have trusted Feldco with their windows, siding and doors. Click the button below and we’ll get started on your quote!