Heritage Reimagined
Our sliding sash windows celebrate the character of classic British design, brought up to date with 21st-century engineering.
Perfect for homeowners preserving original features, and for architects seeking authentic detail with modern standards.
Box Sash Windows
Faithful to tradition, our box sashes feature cords, weights, and pulleys, designed for conservation areas and listed buildings, while offering discreet performance upgrades behind every joint.
Spring Balance Sash Windows
A contemporary take with clean operation and reduced frame depth, ideal for new builds or where space and maintenance are a consideration.
Energy Efficient by Nature
The warmth of timber, combined with high-performance glazing, including slimline PassivGlas options, delivers modern comfort while preserving historic features and style.
Better than triple glazing: we offer PassivGlas, the latest vacuum glazing technology that is thinner, warmer and quieter than triple-glazing. Ideal for both retrofit and low-energy builds.
Key Features at a Glance
Energy Efficient: Lignum Sliding Sash Windows offer the traditional elegance of slim sashes but don’t compromise on high-performance glazing and insulated frames, to keep your home warm in winter, cooler in summer and comfortable all year round.
Security Assured: High security comes first, tested to the latest PAS24:2022 security standards, Lignum windows offer peace of mind without compromising style.
Timber Sustainability: Ethically sourced materials ensure that your wooden Sliding sash windows are as environmentally friendly as they are beautiful.
Security with Subtlety
Tested to PAS24:2022, with built-in locking mechanisms that ensure peace of mind without interrupting the visual purity of the design.
Customised your way
No two homes—or architectural projects—are the same. Each sliding sash window can be customised with horns, bar layouts, finishes, and fittings to deliver a cohesive and considered result.
✓ Authentic detailing for listed properties
✓ Designed for retrofit or new build applications
✓ Flexible construction for full conservation compliance
Accreditations and Performance
PAS 24:2016
Security
Secured by
Design System
Document Q
Compliant
Document L
Compliant
Document M
Compliant
BS6375-1 2009
Weather Tightness
Sliding Sash Window Furniture
Enhance the character of your Lignum sliding sash sash windows with our curated selection of quality hardware.
From timeless period pieces to refined contemporary designs, our furniture range brings your sash windows to life with detail and durability. Every component, from lifts to locks, is built to last and independently tested to PAS24:2022 standards for enhanced home security.
Colours and Finishes
Whether you’re restoring a period home or building something new, our colour palette offers inspiration. Choose from trending shades, natural wood tones, or any RAL colour to suit your project.
Custom Match Available
Have a specific shade in mind? We offer a professional colour-matching service to get it just right.
Our Warranties
Rot & Fungal Decay
Workmanship
Paint Finish
Hardware
Glazing up to
Finishes Designed to Endure
Our finishes don’t just look beautiful—they’re built to perform.
Developed with leading coating specialists, our colour and stain systems withstand the elements and retain their appearance year after year. With minimal maintenance required, your sash windows will continue to impress season after season.
