Spiral Window Balances

Spiral window balances keep sash windows easy to lift, position, and close by counterbalancing the weight of the glass. Housed in a slim tube with a wound spring and spiral rod, they provide smooth operation, help prevent slamming, and improve energy efficiency by letting the sash sit squarely in the frame. If your double-hung, single-hung, or tilt window feels heavy or won’t stay open, a replacement spiral balance is a simple upgrade that restores safe, quiet performance.

These balances are common in vinyl, aluminum, and wood windows and are popular for tilt-in sashes used for cleaning. Typical tube diameters include 3/8-inch and 5/8-inch (often listed as 9/16-inch measured, but sold as 5/8-inch). Tip colors—such as red, blue, green, and black—identify spring strength to match a specific sash weight range. Options include pre-tensioned units, corrosion-resistant coatings, and compatible pivot shoes, brackets, and pivot bars.

Choosing the right spiral window balance is straightforward:
- Measure the tube length (not including the tip) and diameter.
- Weigh the sash or use the manufacturer’s size chart to select the correct color tip strength.
- Confirm tilt versus non-tilt design and match the correct shoe style.
- Replace balances in pairs for even lift and alignment.

Installation is DIY-friendly with basic tools. Remove the sash, release the old balance, swap the pivot shoe if needed, and pre-charge the new balance with a spiral charging tool. Start with two to four turns of tension, test the sash travel, and fine-tune until the window holds at multiple positions. A light silicone-safe lubricant on the spiral can reduce noise and wear. Signs you need new balances include a sash that drops, binding on travel, or visible spiral deformation. Quality spiral balances extend window life, improve comfort, and reduce maintenance. Many models are made in USA and ship pre-tensioned for faster installs today.