Rectangular Lead Sash Weights
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Rectangular Lead Sash Weights (45mm x 35mm)
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Rectangular Lead Sash Weights (50mm x 25mm)
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Rectangular Lead Sash Weights (50mm x 35mm)
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Rectangular Lead Sash Weights (60mm x 30mm)
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Rectangular Lead Sash Weights
Rectangular lead sash weights are the most widely used counterbalance profile in traditional timber sash window systems. Their flat-sided shape allows efficient movement within narrow box frame cavities while providing reliable and consistent balance.
Why Rectangular Profiles Are Most Common
The shape of rectangular lead sash weights makes them ideal for standard sash frame construction. Their straight sides allow smooth vertical travel without excessive rotation inside the weight channel. This improves operational consistency and reduces wear on internal components.
Many original period windows were designed specifically to accommodate rectangular counterweights, making them the preferred choice for restoration and refurbishment work.
Reliable Counterbalance Performance
Correctly specified rectangular lead sash weights ensure smooth opening and closing. Proper balance prevents sudden dropping or rising, improving safety and usability.
Accurate counterbalancing also reduces strain on critical hardware components such as sash cord and sash pulleys.
Compatibility With Different Frame Types
Rectangular lead sash weights are suitable for a wide range of timber sash window designs. They work effectively in both heritage restorations and modern joinery installations.
Their compact profile allows proper counterbalance even in narrow internal cavities, making them particularly versatile.
Alternative Weight Profiles
Depending on frame design, other profiles may also be suitable:
Restoration and Installation Applications
Rectangular lead sash weights are commonly used in restoration of period properties, replacement of worn counterweights, and new joinery builds.
Their traditional material and efficient profile ensure reliable performance and long service life.
Browse our range of rectangular lead sash weights to find suitable counterbalance solutions for refurbishment and installation projects.