Timber Flush Casement Windows – Where Tradition Meets Tomorrow
Bring enduring charm and contemporary performance together with our beautifully engineered Lignum Timber Flush Casement Windows. Expertly designed by The Joinery Network, the flush sash window style is crafted to sit flush within the frame, creating a sleek, elegant finish that suits both classic homes and modern builds.
Whether you’re updating a country cottage or styling a new architectural build, flush casement windows bring balance, beauty, and performance to any project.
Craftsmanship Without Compromise
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.
Every Lignum window is built by experienced joiners using sustainably sourced wood and the latest precision technology. With custom detailing, a wide choice of finishes, and enhanced thermal efficiency, these windows are built to perform as beautifully as they look.
From minimalist to heritage-inspired, your windows can be tailored to reflect your home’s unique personality.
Smarter, Greener, Warmer
With energy prices rising, efficiency matters more than ever. Our flush casement windows are fitted with high-performance glazing and naturally insulated timber frames to keep warmth in.
Better than Triple glazing: we also offer PassivGlas – a next-generation vacuum glass technology with superior insulation performance (Ug Value as low as 0.49W/m²K), delivering the benefits of triple glazing in a thinner, lighter profile.
Key Features at a Glance
Energy Efficient: High-performance glazing and insulated frames keep your home warm in winter and cool in summer.
Security Assured: Designed to meet PAS24:2022 security standards, our windows offer peace of mind without compromising style.
Timber Sustainability: Ethically sourced materials ensure that your flush casement windows are as environmentally friendly as they are beautiful.
Built for Security
Our windows are designed with both beauty and security in mind. All components meet PAS24:2022 standards, ensuring peace of mind alongside timeless design.
Whether you’re refurbishing a Georgian townhouse or fitting out a modern eco-home, you won’t have to choose between form and function.
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
Customised
your way
No two homes are the same. That’s why our flush sash casement windows are fully customisable – from period-style features like traditional ironmongery and glazing bars to contemporary colour palettes and clean-lined finishes.
Choose from a variety of glazing bar configurations with either heritage or contemporary window furniture.
Our stain finishes that reveal and protect the timber’s natural beauty, or choose from our long-lasting colour painted finishes in soft neutrals or bold tones.
Hardware options
Choice of Flush Casement Window Furniture
We offer a wide range of handles, furniture and hardware to customise your windows.
Our period collection features the styles and finishes for a classic heritage look, and our range of contemporary design options provides a modern twist. All window handles and locks are rigorously tested and achieve PAS24:2022 certification for security.
Colours and Finishes
Choosing the colours and finishes makes all the difference to the look and feel of your timber windows and doors.
We’ve curated trending colours for traditional-styled casement windows and a fresh colour palette to complement the sleek lines of contemporary design.
Our Warranties
Rot & Fungal Decay
Workmanship
Paint Finish
Hardware
Glazing up to
A Finish That Lasts
We use high-performance coatings designed to withstand the British weather.
Our colour and wood stain finishes stay vibrant, resist flaking and fading, and require minimal maintenance, so your windows look stunning for years to come.
Ready to Design Your Perfect Windows?
With The Joinery Network, you’re not just choosing a window, you’re investing in craftsmanship that respects tradition and embraces innovation. We’ll create windows that add warmth, character and performance to your home.
