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REPAIR SERIES- Venetian Blind Restringing

Writer's picture: Pulse Blind WorxPulse Blind Worx

Updated: Jan 20

Restringing Venetian blinds may appear intimidating, but with some patience and the appropriate tools, it becomes a feasible DIY project. Here's how to accomplish it:

What You’ll Need:

  • Replacement cord (make sure it’s the right size and length for your blinds)

  • Scissors

  • Small flathead screwdriver (if needed)

  • Needle-nose pliers (optional)

  • Tape (optional, for holding the blinds in place during the process)


Step 1: Remove the Blind from the Window

Before you start, carefully remove the blinds from the window. Depending on your type of blinds, this may involve unhooking them from the brackets or sliding the headrail out of the mounting brackets.


Step 2: Assess the Blinds

Lay the blinds down on a flat surface such as a table or floor. This will give you a better view of how the cords are threaded and allow you to easily manipulate the blinds as you restring them.


Step 3: Identify the Broken Cord

If only one cord is broken, you’ll need to replace that particular cord. If multiple cords are damaged or broken, you’ll need to replace each one.


Step 4: Remove the Old Cord

Use your flathead screwdriver or needle-nose pliers to carefully remove the old cord from the blinds. You may need to pry open the top of the headrail (where the cords are threaded through) to access the old cord. If the cords are attached with knots, untie them gently, or cut them carefully with scissors.


Step 5: Measure and Cut the Replacement Cord

Measure the length of the old cord to determine how much new cord you’ll need. Typically, the new cord should be around 1.5 times the height of the blind to ensure there’s enough to thread through each slat. Add a little extra length just to be safe.

Cut the new cord to the required length using scissors.


Step 6: Thread the New Cord Through the Headrail

At the top of the blind, there are small holes where the cords are threaded. Use your new cord and carefully thread it through the holes in the headrail. You may need to thread it through multiple small channels or pulleys depending on the style of your Venetian blinds.

If necessary, use a needle-nose pliers or small hook to help guide the cord through difficult-to-reach areas.


Step 7: Thread the Cord Through the Slats

Now that the cord is through the headrail, it’s time to thread it through the individual slats. Start at the bottom and work your way up. The cord should go through the lift holes in each slat, usually in a zigzag or "ladder" pattern, depending on your blinds' design.

Be careful to make sure the cords are not tangled as you work your way through each slat. For easier handling, you can secure the bottom of the blinds temporarily with tape to keep them from moving while you thread the cord.

Step 8: Tie the Knots


Once the cord has been threaded through all the slats, tie a knot at the bottom of the cord to secure it in place. The knot should be large enough to hold the slats and prevent them from slipping off. Ensure the knot is tight and secure to prevent any slats from falling.


Step 9: Adjust the Tension

Now that the cord is securely in place, check the tension by raising and lowering the blinds. If they don’t move smoothly, you may need to adjust the tension in the cords. You can do this by adjusting the knot or the amount of slack in the cord. Make sure the blinds lift and lower evenly.


Step 10: Reinstall the Blinds

Once the cord is threaded correctly and the tension is adjusted, carefully rehang the blinds back in the window. Slide the headrail back into the mounting brackets or rehook the blinds to their original position.


Step 11: Test the Functionality

Finally, test the blinds by pulling the cords to raise and lower the slats. Ensure the blinds move smoothly, and the new cord is functioning properly. Adjust the cords as needed to get the perfect tension and operation.


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Close-up of broken white window blinds with frayed strings against a black and gray background.

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