Product description
Spiral Sash Balance Kit D4
Spiral sash balance kit D4 is a compact spring-assisted counterbalance system designed to support smooth sash window movement. The internal spring mechanism helps maintain controlled positioning during opening and closing while reducing the need for traditional counterweight cavities.
Compact Spring Balance System
The balance mechanism operates using an internal tensioned spring housed within a protective tube. As the sash moves vertically, resistance adjusts automatically to support controlled movement and stable positioning.
Because the system operates without traditional lead or steel counterweights, it is particularly suitable for slimmer timber frames and refurbishment projects with limited cavity space.
D4 Spiral Balance Performance and Reliability
Correctly specified balances improve sash usability by supporting smooth and predictable movement. Balanced operation also reduces unnecessary strain on surrounding hardware and helps improve long-term reliability.
The compact design simplifies installation while maintaining dependable support during everyday use.
Suitable Applications and Installations
This spring balance system is commonly used in replacement sash projects, modern timber joinery, and refurbishment work where traditional counterweight systems are impractical.
Proper specification ensures stable movement and helps maintain the traditional sliding operation expected from sash windows.
Compatible Sash Components
For best performance, the balance system should operate alongside compatible sash hardware including:
Installation Guidance
Accurate installation and adjustment are essential for smooth operation. Matching the correct spring strength to sash weight improves consistency and reduces wear over time.
Properly installed systems provide reliable support and help maintain smooth vertical sash travel.
Further Guidance
For additional information on traditional timber window maintenance and refurbishment, visit Historic England .
Choose spiral sash balance kit D4 for compact installation, controlled movement, and dependable long-term sash performance.