
Sash Window Add On Weight - Half Pound (0.23kg)
Sash Window Add-On Lead Weights – Half Pound
Perfect for all double-hung sash windows, these half-pound add-on lead weights are designed for fine-tuning and achieving precise counterbalance when restoring or repairing traditional sash windows.
Why Add-On Weights Matter:
- The total weight of the counterweights should match the full weight of the glazed sash for smooth operation.
- Weights must fit comfortably side-by-side inside the weight pocket and move freely without clashing.
- The length of each counterweight must allow vertical travel within the sash box equal to the sash's full movement range.
Our unique round and domed design allows these add-on weights to slot neatly onto existing sash weights, offering smooth and seamless movement inside the box without the jamming issues common with square weights.
This half-pound version is even smaller, making it ideal for more intricate adjustments where precision is key.
Before ordering: Always check the internal dimensions of your sash box to ensure compatibility with the weight size.
Product Dimensions:
Diameter: 36mm
Height: 32mm
Important Shipping Note:
Sash weights are heavy and bulky. Standard flat rate shipping does not apply. Shipping costs will be calculated at checkout based on your location.
Proper Handling & Safety
Lead is a hazardous material and must be handled with care. Use these products in a well-ventilated area or outdoors, and always wear personal protective equipment (PPE) when handling. Dispose of any waste responsibly and in accordance with your local regulations.
For more safety information, please refer to the Safety Data Sheet here.
You might need...

- Phone support | 0425 229 090
TIP: We always recommend having all materials onsite PRIOR to commencing any restoration project as sometimes delays occur in the courier network which are outside of the control of Lock and Latch.
Installation:
How to Rebalance Your Double-Hung Sash Window
Remove the sash window: Carefully lift and tilt the sash out of the frame. You may need to remove the staff and parting beads first.
Access the weights: Inside the frame, open the weight pocket cover (behind the parting bead). Untie the sash cord, pass it back through the pulley, and remove the old weights.
Top sash: Weigh the sash using a bathroom scale. Add 1 pound (approx. 0.46 kg), then divide by 2. This is the weight needed on each side of the top sash.
Bottom sash: Weigh the sash and divide the total weight by 2. This is the weight needed on each side of the bottom sash.
Install new cord and weights: Thread a string with a small weight through the pulley to pull the new sash cord through. Tie on the new weights and knot securely to avoid slipping.
Reinstall the sash: Carefully place the sash back into the frame. You may need assistance. Pin the cord to the sash using galvanised nails and test for smooth operation.
Tip: Make sure both sashes are properly balanced before sealing up the frame. This ensures safe and smooth operation.
🚚 Shipping & Delivery Information
Please note: We are unable to guarantee any delivery times. If you are in urgent need of your items, please contact us on 0425 229 090. We may be able to arrange an express delivery service, if available.
Local Pick-Up Option: We have a warehouse in Warriewood, Sydney where local pick-up is available. This is by pre-arrangement only. Please contact us to organise a suitable time before visiting.
Important: We always recommend having all materials onsite prior to commencing any restoration project, as delays in the courier network can occur and are outside the control of Lock and Latch.
🌍 International Orders
For international shipping quotes, please contact us on +61 425 229 090.
📦 Estimated Delivery Times
NSW, QLD, VIC
Metro areas: 2–5 business days
Regional & Country areas: 3–14 business days
Western Australia
Perth & Metro areas: Up to 10 business days
Regional areas: 3–14 business days
Public holidays, especially around Christmas, tend to cause delays due to increased volume and reduced working hours. Many courier services experience slower processing times, and there's often a backlog of parcels. Please allow for delays during this time.