Ultimate Range
SPIRAL BALANCES



Blending Heritage with Modern Precision
Timber Sash Co crafts the finest sliding sash windows, designed to preserve the timeless elegance of Georgian and Victorian-era styles. Featuring slim sash sections, narrow meeting rails, ovolo mouldings, and decorative horns, our windows perfectly replicate the charm and character of period architecture. Built from 100% Accoya timber, they are guaranteed not to decay, ensuring exceptional durability for a lifetime of use. Each window is prefinished in your choice of colour, with a low-maintenance paint finish designed to last 12–15 years.
Our Ultimate Window with spiral balance technology combines the aesthetics of traditional sash windows with a modern, streamlined mechanism. This advanced system provides smooth and effortless operation without the need for traditional cords and weights. Triple-sealed sashes and high-performance double glazing ensure excellent thermal efficiency, while secure locking systems and fully suited furniture offer peace of mind. With innovative 'TSC EASYFIT' components for straightforward installation and maintenance, bespoke designs tailored to your needs, and exceptional nationwide service, the Ultimate Window with spiral balances is the perfect blend of tradition and innovation.



Why Choose the Ultimate Range
This traditional sliding sash window has been meticulously designed to replicate, in as much detail as possible, the larger sash windows commonly found in Victorian and Georgian-style homes. The large opening windows of this period were often considerably heavy, requiring substantial frame sections to maintain their structural integrity.
With spiral balance technology, the need for traditional counterbalance weights is eliminated, allowing for a sleeker box construction while maintaining the same overall depth of 165mm (6 1/2''). The 56mm (2 1/4'') deep sashes accommodate 24mm double glazing and feature a decorative ovolo moulding inside, preserving the authentic appearance of period windows.
The 24mm Low-E, Argon-filled double glazing provides an excellent thermal barrier with a U-Value of approximately 1.2W/m²k, making it our most thermally efficient sliding sash window. The Ultimate Window with spiral balances is also suitable for smaller openings, modern properties, and new builds (if the depth of reveal allows), ensuring compliance with current building regulations while delivering outstanding performance and timeless aesthetics.
Technical Specifications
Timber
Accoya Sustainable Timber (Grade 1, 50 year warranty)
Double Glazing
4/16/4 Clear Tough Low-E Argon (Optional Duplex Bar/Grill)
4/16/4 Clear Float Low-E Argon (Optional Duplex Bar/Grill)
Finish
Teknos 3 Coat System
Security
'Secured By Design' Locking Heritage Fitch Fastener
'Secured By Design' Locking Restrictors
Features
56mm sash depth
165mm box section
Colour matched parting bead with integral brush seal
2 x AQ21 seals to sash perimeter
Brush seals to meeting rails
External glazing bead with security glazing tape
Removable 'TSC Easy Fit' staff beads for easy maintenance and installation.
Concealed fixings for pre-glazed fixed sashes
All sashes factory glazed
Optional decorative horns internal and external
Optional moulded meeting rail
Ovolo moulded sash sections & astragals
Narrow 22mm astragal
Narrow 48mm sash sections
Optional 40mm Mid Rail
Deep 96mm bottom rail
Fully suited furniture
Spiral Balances

Ultimate Range
SPIRAL BALANCES