Fix It! Repairing Single Hung Window Springs Like a Pro

Understanding window functionality is key to home maintenance, especially when dealing with single-hung windows. A common issue homeowners face is spring failure, impacting the window's ability to stay open. This guide will empower you with the knowledge of how to repair single hung window springs like a pro. With the right tools, like a flathead screwdriver and replacement springs, and understanding the mechanics, even dealing with brands such as Andersen Windows becomes manageable. Mastering how to repair single hung window springs saves time, money, and ensures a smooth-operating window.

Image taken from the YouTube channel The Pirate Handyman , from the video titled EASY Single Hung Window Repair - Single Hung Balance Spring Replacement .

How to Repair Single Hung Window Springs Like a Pro

Single hung windows, where the bottom sash moves up and down, rely on springs or balances to operate smoothly. When these springs fail, the window can become difficult to open, prone to slamming shut, or simply stay stuck. Knowing how to repair them can save you money and keep your windows functioning properly. This guide provides a step-by-step approach to fixing single hung window springs.

Understanding Single Hung Window Springs

Before you start repairs, it's important to understand the different types of springs and how they work.

Types of Window Springs/Balances

There are several types of springs or balances used in single-hung windows:

• Coil Springs: These are encased in a metal or plastic housing and use a coiled spring to counteract the weight of the window sash. They often run along the sides of the window frame.
• Spiral Balances: These consist of a metal rod that twists to provide tension. They're usually found within a tube or housing mounted along the window frame.
• Block and Tackle Balances (also called Cord and Weight Balances): While less common in modern windows, these use a system of cords and weights concealed in the window frame to balance the sash. We won't cover cord and weight balances in this guide.

Identifying the Problem

• Window Slips Down: This usually indicates a broken or weakened spring.
• Window is Difficult to Open: This could mean the spring is seized or has lost its tension.
• Visible Damage: Inspect the spring mechanism for any obvious signs of breakage, corrosion, or detachment.
• Listen: When you move the window, listen for unusual noises such as grinding or scraping which can indicate a problem.

Tools and Materials Needed

Gather the necessary tools and materials before starting your repair:

• Safety Glasses: Essential to protect your eyes from debris.
• Gloves: Protect your hands.
• Screwdrivers (Phillips and Flathead): For removing and installing screws.
• Pliers: For gripping and manipulating small parts.
• Putty Knife or Flat Pry Bar: For carefully removing window stops.
• Replacement Springs/Balances: Be sure to get the correct type and size for your window. Measure the old spring or balance before purchasing.
• Measuring Tape: To ensure proper alignment and placement.
• Level: To ensure the window is properly aligned after repairs.
• Work Surface: A clean, flat surface to place the window sash during the repair.
• Lubricant (Silicone Spray): For lubricating moving parts (optional, but recommended).

Step-by-Step Repair Guide

Follow these steps to repair your single hung window springs:

1. Prepare the Work Area: Cover the work area to protect it from scratches. Lay down your drop cloth.

2. Remove the Window Sash:

   • Carefully remove the interior window stops (the trim pieces holding the sash in place) using a putty knife or flat pry bar. Gently pry them away from the window frame, being careful not to damage the wood.
   • Once the stops are removed, carefully tilt the window sash inwards and lift it out of the frame. Some windows have a tilt-in mechanism; if so, engage it to release the sash.

3. Identify and Remove the Old Spring/Balance:

   • Examine the spring mechanism. Note how it is attached to the sash and the window frame. Take photos for reference.
   • Depending on the type of balance, you may need to unscrew it, detach it from a clip, or release a tension mechanism.
   • If the spring is broken or damaged, carefully remove all pieces.

4. Install the New Spring/Balance:

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   • Follow the manufacturer's instructions for installing the new spring/balance.
   • Typically, you will attach it to the window sash first and then to the window frame.
   • Ensure the new spring is securely fastened and properly aligned. Double-check that it matches the orientation of the spring you just removed (take pictures!)
   • If using a coil spring, ensure proper tension adjustment, as specified by the manufacturer.

5. Reinstall the Window Sash:

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   • Carefully tilt the window sash back into the frame, aligning it with the spring mechanism. Ensure it engages properly.
   • If your window has a tilt-in mechanism, make sure the sash is locked in correctly.
   • Test the window movement. It should move smoothly up and down without sticking or slamming.

6. Reattach the Window Stops:

   • Reattach the interior window stops using finishing nails or screws. Make sure they are flush with the window frame.
   • If the old stops are damaged, consider replacing them with new ones.

7. Test and Adjust:

   • Open and close the window several times to ensure it operates smoothly and securely.
   • If the window is still sticking or slamming, recheck the spring tension or alignment.

Troubleshooting Common Problems

Safety Precautions

• Always wear safety glasses and gloves to protect yourself.
• Be careful when handling sharp tools.
• If you are uncomfortable with any step, consult a professional window repair service.
• Ensure the window is properly supported while you are working on it to prevent it from falling.
• If you are working on a second-story window or higher, take extra precautions to prevent falls.

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