How to Replace Sash Window Springs

A sash window is the 2nd most popular type of window after casement windows. They include a set panel, and a mobile ‘sash’ panel, which can sliding up and down to permit the window to open and close. This is possible thanks to a complex arrangement of cables, weights and springs, that are hidden into the frame.

Given that these systems are concealed, they tend to boast a long life expectancy. When they do fail however, it can be challenging to correct the issue and get the window operating once again– however possible.

Here we’ll stroll you through how to eliminate and replace among these components: the moving sash window springs.

What Do Sash Window Springs Do?

Traditional sash windows operate via a system of weights and sheaves that keep the sash in position. Weights are thoroughly picked to stabilise against the sash, so that when you open the window, you don’t have to really bear all of the weight on your own.

Obviously, this vastly increased the weight of the window. While you can still get weight-and-pulley sash windows, modern options utilise springs instead. This implies that instead of the weight of the sash being reversed by the weights in the frame, it’s counterbalanced by a set of springs, each attached to the sheave just as a weight might be.

A spring-based sash window will come with one spring on each side, with the pair stabilising the weight of the sash between them. When among the springs fails, your window will fall down on one side, and will not stay open. Now, it might be that it’s the cable connected to the spring that’s snapped rather than the spring itself. The only method to discover is to open up the window and check.

How to Replace Sash Window Springs
You will not need any specialised tools to do this task, though you will require:

  • A flat-head screwdriver
  • A brand-new sash window spring
  • Someone to help you.


Let’s run through the process, step by step.

Step 1.
You need to eliminate any stops that might be avoiding your sashes from rising too far within the frame. These are generally plastic, and removable with simply a little bit of force. You’ll discover them on the inside, near the top of the window.

Step 2.
Next, you’re going to take out the clips, which you’ll discover a couple of inches above the sash. These clips are created to keep the weights in place while the window is total. You may need to prise these away with the head of your screwdriver. You do not want to eliminate them completely; you just need enough room to raise the sashes.

Step 3.
You’re now going to eliminate the sash from the frame. If it’s a big sash, then make certain your volunteer has hold of the other end. You’re going to be lifting it up on one side, following which the other must slide out quickly. Lay the sash on the floor, someplace safe.

Step 4.
You’ll have the ability to see the spring balances now. Push on the top of them to launch the clips, and keep hold of the springs to prevent them unwinding. Raise the spring balance until there’s no more stress on it, and you’re able to quickly unhook it from the bottom of the frame. Don’t release it under tension, or you’ll run the risk of hurting yourself and harming the window.

Step 5.
Having eliminated the balance, it’s time to measure up for a replacement. To do this, determine the width across the back of the balance, and the height of the channel (not consisting of any accessories at the top or bottom of the channel). You’ll need to match those attachments up when you’re looking for a replacement channel.

Step 6.
If you don’t already have a replacement spring balance, you’re going to need to acquire one. It’s great to leave the window without a spring throughout this time; you simply won’t be able to open it.

Step 7.
As soon as you have your replacement spring to hand, you’re going to be connecting it utilising the hook at the bottom. There need to be a gap at the bottom of the frame that’ll accommodate it. To get the balance into the frame, you’ll need to push down until you can get the top of the balance below the screw. Once this is done, you’ll have a brand-new spring inside the frame, and all that’s left will be to change the sash itself.

Step 8.
Getting the sash back in might well be a 2 person task. You’re going to be lifting the sash right to the top of the frame and pressing the opposite side into position. You then lower the whole sash till you can feel it moving versus the spring balances. You’ll know if you’ve done it right, because the weight of the sash will right away reduce.

Step 9.
Lastly, we’ve got to re-insert the clips so they’re flush with the frame. Do this in exactly the same way as you took them out.

Step 10.
Prior to we complete, it’s worth inspecting that whatever relocations as it should. Be sure to lift and decrease the sash entirely, several times. When this is done, you can safely declare the window repaired.

Now, if all of this looks like a lot of work, we ‘d recommend you save yourself a long time later down the line and replace both springs in one go.

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