Window Sash Balances

Window sash balances are the hidden counterbalance mechanisms that let you open, close, and position window sashes smoothly without slamming or sticking. Found in double-hung and tilt windows across wood, aluminum, and uPVC frames, they use springs and pulleys to offset sash weight, improving safety, comfort, and quiet operation while helping the sash seal properly for better energy efficiency.

Common types include channel balances (block-and-tackle), spiral balances, and constant force (coil) balances. Channel balances use a metal channel with a cord and pulley; they’re popular in non-tilt and tilt applications. Spiral balances use an internal spring and are identified by tube diameter and color tip, which matches sash weight. Constant force balances use coiled springs, often in modern vinyl windows, for consistent lift over time.

Choosing the right replacement is straightforward with a few checks:
- Identify window type: tilt or non-tilt
- Measure the metal channel length end-to-end (for channel balances)
- Note stamp codes and weight capacity
- Match shoe style and width (winged or wingless)
- For spiral balances, confirm tube diameter (3/8 or 5/8) and color tip
- For coil systems, read the number on the spring and count how many stacks per side

Benefits you’ll notice right away include smoother lift, stable stay-open positioning, reduced sash rattle, and fewer drafts thanks to a consistent seal. Properly matched balances also lower strain on locks and frames, extending window life.

Signs you need new balances: the sash drops, won’t stay up, feels heavy to lift, or bangs shut. Replacement is a DIY-friendly task with basic tools. Support the sash, release tension or clips per the balance type, swap hardware, then re-tension (spiral) or re-engage the shoe and clips (channel). A dab of silicone spray on tracks helps long-term performance.

Shop window sash balances, shoes, guides, coils, take-out clips, and tensioning tools to repair or upgrade your window hardware and restore smooth, reliable operation.

Window Sash Balance Pivot Bars 6970, Window Pivot Bar, Sash Balance Parts Replacement, Window Hardware Replacement Parts for Pella, Fit for Single or Double Hung Window
Window Sash Balance Pivot Bars 6970, Window Pivot Bar, Sash Balance Parts Replacement, Window Hardware Replacement Parts for Pella, Fit for Single or Double Hung Window

6970
H 3837 2-3/16 In. White Plastic Window Channel Balance Sash Cams
H 3837 2-3/16 In. White Plastic Window Channel Balance Sash Cams

H 3837
Window Sash Balance Top Guide 60-617-XCP10, Window Track Guide Balancer Parts, Window Channel Balance Lock, Single or Double Hung Window Sash Cam, Top Mount（Pack of 10）
Window Sash Balance Top Guide 60-617-XCP10, Window Track Guide Balancer Parts, Window Channel Balance Lock, Single or Double Hung Window Sash Cam, Top Mount（Pack of 10）

B0F8B4VVFW
- 2640 26-4 Block and Tackle Cartridge Channel Balance
- 2640 26-4 Block and Tackle Cartridge Channel Balance

CWH_B&T_2640
4 Pcs 6970 Window Sash Balance Pivot Bars for Window Accessory
4 Pcs 6970 Window Sash Balance Pivot Bars for Window Accessory

6970