Alexei Volkov
Windows that won't stay open or slide up and down are often caused by a faulty sash spring balancer. Replacing the spring balancer can be done at home and does not require any special tools, although it is important to be careful when handling the window sashes as the spring mechanism in the balancers can create tension that could snap back. To replace the spring balancer, you will need to remove the window sash, inspect the balancer for any issues, and replace the spring if necessary. You can then reinstall the window sash, ensuring it is properly aligned, and test the window to see if it is working correctly.
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What You'll Learn
Identify the window type
Identifying the type of window you have is the first step in replacing a plastic spring window. There are several types of windows, and they vary in terms of their functionality, style, and shape.
The most common types of windows are picture, casement, bay, single-hung, double-hung, awning, and horizontal sliding windows. Casement windows are hinged and open to the sides, offering great ventilation but lacking in security. Single-hung and double-hung windows open vertically, with the former having only the bottom part moveable, and the latter allowing both sashes to slide up and down. Awning windows have hinges and open outward from the top, resembling an awning when open. They are suitable for rainy climates as they can be open during storms. Horizontal sliding windows are similar to single-hung windows but open horizontally.
Other types of windows include specialty windows, which come in non-standard shapes like arches, triangles, circles, and trapezoids, and offer aesthetic and functional benefits. Tilt and turn windows are common in Germany and Europe but hard to come by in Canada. Skylights are another type of window built into the roof to add natural light to a room with limited wall space.
Window frames also vary and can be made of vinyl (usually PVC), aluminum, or wood. Vinyl window frames are water-resistant and easy to maintain, while aluminum offers a contemporary style and conducts heat and cold well. Wooden window frames do not stick due to expansion and contraction but require annual maintenance to prevent rot and weathering.
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Gather tools and safety equipment
Before you begin the process of replacing a plastic spring window, it's important to gather the necessary tools and safety equipment. Safety should always be a priority when undertaking any home improvement project, and replacing windows is no exception. Here is a detailed list of the tools and safety equipment you should assemble:
Tools:
- Pliers: You will need pliers to grasp the plastic plug attached to the end of the spring-loaded string.
- Screwdriver: A flathead screwdriver is required to turn the brake assembly of the balance frame.
- New spring balancer: Purchase a new spring balancer from your local home improvement store.
- Lubricant: A silicone-based lubricant is essential for maintaining your windows. Lubricate the moving parts annually to ensure smooth operation.
- Cleaning supplies: Regular cleaning of the window tracks is necessary to prevent debris buildup.
Safety Equipment:
- Eye protection: Wear safety goggles or glasses to protect your eyes from debris or any particles that may come loose during the replacement process.
- Gloves: Gloves will provide a secure grip and protect your hands from sharp edges or debris.
- Respiratory protection: Consider wearing a face mask or respirator to avoid inhaling dust or debris.
- Hard hat: A hard hat will protect your head from any falling objects or debris.
- Work clothes and closed-toe shoes: Wear long pants and a long-sleeved shirt to protect your skin from scratches or debris. Closed-toe shoes will protect your feet from any falling objects.
It is important to work carefully and use the correct tools to avoid injury. Window sashes can be heavy, and the spring mechanism in the balancers can create tension that could snap back if mishandled. Always prioritize your safety and, if in doubt, consult a professional.
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Remove the window sash
Removing the window sash from a spring-assisted window can be done by following these steps:
First, remove the inside window stops to expose the edge of the track. This will involve unscrewing the inner stops and removing the screws holding the track in place. Be careful when handling the sash, as it can be heavy, and the spring mechanism can create tension that could snap back if mishandled.
Next, you will need to remove the fasteners in the track. There may be only one fastener visible, but there is likely another at the top, and possibly more, depending on the window. Only two fasteners are needed on each side, top, and bottom.
With the fasteners removed, you can now take out the sash and the spring jambs together. Be careful not to bend or break the spring assembly, as it may not be possible to put it back together correctly. If your window has a release point for the spring, you may be able to release the tension and then remove the spring and sash separately.
Once the sash and spring assembly are removed, you can begin the process of installing the new sash. This will involve reversing the steps outlined above. It is important to work carefully and use the correct tools to avoid injury and potential damage to the window.
If your window has a more complex balancing system or if you are unsure about any part of the process, it is recommended to consult a professional or a specialist, especially for historic or custom windows.
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Inspect the spring mechanism
Inspecting the spring mechanism of a plastic spring window is crucial to understanding the underlying issue and performing the necessary repairs or replacements. Here is a step-by-step guide to help you through the process:
Locating the Spring Mechanism:
First, identify the type of window you have. Older single-hung windows often have rod springs, while newer single-hung and double-hung windows are usually fitted with balance springs. Spiral balancers and constant force balancers are two types of spring mechanisms found in double-hung windows.
Accessing the Spring:
If your window has rod springs, locate the metal latches at the top of the frame and unlock them to remove the window pane. Then, find the window rods on either side of the frame. To access the spring, press down on the top of the rod to compress it, pull the top outward, and unhook the bottom from the latch inside the frame.
For balance springs, you may need to remove both window panes. Slide the window latches to tilt the bottom pane towards you, then tip one side and repeat for the other to free the pane. The balance spring is typically located in the window header.
Inspecting the Spring:
Once you have accessed the spring, carefully examine it for any signs of damage or malfunction. Look for broken or undone coils, as this could be the reason your window is not functioning properly. If the spring appears damaged, it will need to be replaced.
Safety Precautions:
Always exercise caution when working with spring mechanisms. Window sashes can be heavy, and the springs are under tension. Improper handling may lead to injury or damage to the window. Ensure you have the correct tools for the job, especially when tensioning the spiral balance, as improper tensioning can cause balance failure.
Seeking Professional Help:
If you are unsure about any part of the process or encounter a more complex balancing system, consider hiring a professional. Windows with historical or custom designs may require specialist attention to preserve their integrity.
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Replace the spring and reattach the sash
Once you have replaced the spring, you can reattach the sash. To do this, carefully align the sash with the window frame and slide it back into place. Secure the sash by reattaching any screws or fasteners that were removed earlier. Test the window’s operation by opening and closing it to ensure a smooth and balanced movement.
To help your new sash spring balancers last longer and maintain smooth window operation, clean the window tracks regularly to prevent debris buildup. Inspect the balancer strings periodically for signs of wear and lubricate moving parts annually with a silicone-based lubricant. Avoid forcing the window open or closed, as this can strain the balancers.
If your window has a more complex balancing system or if you’re unsure about any part of the process, it might be best to hire a professional. If you’re working on historic or custom windows, consult a specialist to ensure the work is done without damaging the window’s integrity.
To remove the sash, you will need to remove the inside window stops to expose the edge of the track. You will also need to remove the fasteners that are in the track. Unscrew the inner stops, remove the screws holding the track, and take the track, spring, and sashes out together.
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Frequently asked questions
If your window won't stay open, or won't slide up and down, the spring balancer is likely faulty and needs to be replaced.
You will need a screwdriver set, pliers, wire cutters, a spring tensioning tool, safety goggles, protective gloves, a dust mask, and a ladder or step stool.
First, remove the window sash to access the springs. Next, inspect the springs for damage and replace them if needed. Then, reinstall the window sash, ensuring it is aligned properly.
Regularly clean the window tracks to prevent debris buildup. Inspect the balancer strings periodically for signs of wear. Lubricate moving parts annually with a silicone-based lubricant.
