Our Spring Sliding Sash Windows retain the appearance of a classic sash while using a modern spring balance system in place of cords and weights. This makes them slimmer, easier to install, and straightforward to operate, while still providing smooth sliding movement.

Each window is manufactured in engineered timber, available in redwood, hardwood, Accoya or oak, and finished with a durable three-coat factory-applied paint or stain. With U-values as low as 1.4 W/m²K and acoustic ratings up to 39 dB, they meet today’s performance expectations without compromising style.

Options include applied glazing bars, varied cill projections, concealed trickle ventilation, and a choice of ironmongery finishes.

Tested for weather resistance and designed to last for around 60 years with maintenance, these Spring Sash Windows provide a practical, long-term solution for both traditional and modern properties.

Features and benefits:

They deliver classic style, but incorporate a simpler, more compact and modern spring balance mechanism in place of weights and pulleys.
Double-glazed as standard, they are available with safety glass, obscured glass, acoustic glass or solar control glass. Triple glazing is also available to special order.
Twin gasketing ensures reliable weather containment.
Bespoke windows and doors are available; consult manufacturer for details.
FSC certified.

Guarantees:

TRC Contracts Ltd offers robust guarantees on all TRC window ranges we supply and install. The following general terms apply on all new windows:

Expected Lifespan: All our windows are designed with a 60-year service life guarantee.
Manufacturing and Material Defects: ten-year guarantee.
Finishes: The standard three-coat opaque finished joinery is guaranteed for ten years, and the stain finishes are guaranteed against blistering or flaking for six years.
Seals: The seals on double-glazed units are guaranteed for ten years (from the date of delivery).
Ironmongery: Functional failure is guaranteed on ironmongery for two years.

PAS24:2016 Enhanced Security Sash Spring Balance