Timber Casement Windows
High-Performance Timber Casement Windows Made to Order
Our bespoke timber casement windows are designed to combine period authenticity with modern performance. Each unit is made to order, using high-quality Accoya and hardwoods, with glazing and security upgrades available to suit both heritage properties and new-build projects.
Heritage & Period Casement Window History
Casement windows have been part of British architecture since the medieval period, traditionally hinged on the side and often paired with leaded glass. Today, we continue this tradition by replicating original details for conservation areas while integrating energy-efficient glazing, discreet draught seals, and durable finishes.
Security
What's The Benefits Of Our Bespoke Timber Casement Windows ?
- Choice Of Operating Designs – 3 great ranges to choose from: flush, stormproof and tilt & turn.
- Bespoke – made to measure exactly for the perfect fit.
- Draught Proof – we seal all our wooden casement windows against the environmental elements. Using Q-Lon weatherproof seals ensures optimum draught and noise reduction performance so that your property is comfortable and tranquil.
- Period Property? Conservation and heritage designs.
- High Quality And Low Maintenance - fully finished in the factory with 4 coats of TEKNOS spray paint
- Sustainable - all our timber casement windows are made using the best sustainable timbers from responsibly managed forests.
- Secure – a range of wooden casement window security features incorporating the secured by design Winkhaus multipoint locks. Upgrade to laminated glass for that added level of safety.
- Beautiful Range Of Window Furniture – a choice of different styles of handles to suite all interiors.
What are Astragal Glazing Bars on Timber Casement Windows?
Astragal bars are fixed to the surface of the glass on both sides of the sash. Internally, a duplex spacer bar is sealed inside the double-glazed unit. This gives the appearance of individual panes, while keeping the wooden casement window energy-efficient and suitable for modern building standards.
We offer several traditional astragal configurations that are frequently requested in conservation area applications, including Georgian grids and vertical or horizontal bar layouts.
Our Four Wooden Casement Window Options
We offer a complete range of timber casement window designs to suit different property styles and performance needs. Choose from flush casements with slim, heritage sightlines; stormproof casements for enhanced weather protection; or tilt & turn casements that provide flexible ventilation and easy cleaning. Every design can be specified with single, double, or advanced vacuum glazing, with optional traditional or contemporary glazing bars.
Quality bespoke
Flush Casement Window
Quality bespoke
Flying Mullion Casement Window
Quality bespoke
Stormproof Casement Window
Quality bespoke
Tilt & Turn Casement Window
View our wooden casement windows up close
PAS 24, Conservation Area & Article 4 Options
PAS 24: For new-build compliance, we supply casement windows tested to PAS 24:2022.
Conservation Areas & Article 4 Directions: Our team replicates original mouldings, slim profiles, and glazing details to meet planning requirements while achieving improved energy efficiency.
Paint Colour Options
Our Teknos four-coat microporous system provides a durable finish in any RAL colour. Dual-colour finishes are available, allowing different shades inside and out. Current trends include deep heritage greens, soft greys, and off-white shades for period properties.
Glazing Bar Options
Timber casement windows can be manufactured with:
Integral glazing bars for strength and authenticity.
Applied astragal bars to replicate historic patterns.
Options include Georgian, Edwardian, leaded, and bespoke layouts.
View Our Timber Casement Window Gallery
Explore our gallery to see how our bespoke timber casement windows complement a wide range of architectural styles — from Georgian and Edwardian homes to modern extensions and new-build developments. Each project showcases our attention to proportion, detail, and finish, with options ranging from flush and stormproof designs to tilt & turn and flying mullion casements.
Every window in our collection is individually made to order and factory-finished for lasting performance and visual harmony.
Glass Options
Double Glazing (Standard)
Our standard unit offers excellent thermal performance, with centre-pane U-values from 1.2 W/m²K. It’s suitable for most residential projects and comes with a laminated option if additional safety or security is needed. An energy test certificate is available on request.
Vacuum Glazing (Upgrade)
This ultra-slim glazing option delivers centre-pane U-values as low as 0.4 W/m²K while closely matching the appearance of single glazing. It’s ideal for Article 4 and conservation areas where visual authenticity and insulation are both priorities. Lead time for vacuum units is typically 10–12 weeks.
Single Glazing
For projects requiring a traditional appearance, we also offer 4mm single glazing. This is suitable for properties in strict conservation areas and can be supplied with a bead-glazed finish to resemble a putty imitation, depending on your specification.
Glass Types Available Across All Formats:
Where supported by the glazing type, you can choose from the following glass options:
Laminated Glass – For safety and improved security
Acoustic Glass – Helps reduce external noise, ideal for urban locations
Reeded Glass – For a decorative finish with partial obscurity
Satin Obscure Glass – Provides full privacy with a frosted appearance, often used for bathrooms
We’ll guide you through these choices during the design process, or you can contact us if you need help specifying glass for your property or planning conditions.
Hardware Choices
We offer three distinct ranges of casement window hardware, allowing you to match both style and performance requirements:
Classic Range – durable and practical fittings in polished brass, chrome, satin chrome, black, bronzes, and white finishes. A reliable choice for traditional or modern homes. This range also includes Secured by Design approved handles for clients who require enhanced security.
Classic Plus (Coastal) – premium marine-grade stainless steel ironmongery from Coastal, designed for maximum durability and resistance to coastal or high-exposure conditions.
Deluxe Range (From The Anvil) – hand-forged ironmongery with characterful detailing, perfect for clients seeking authentic period finishes with modern performance.
Our Classic Range includes handles, stays, and Secured by Design approved options for enhanced security.
Timber Casement Window Technical Details
Typical CAD drawings are provided for all casement ranges – including flush, stormproof, flying mullion, and tilt & turn – showing key frame sections, sash profiles, and weather-seal positions. These drawings help architects, contractors, and homeowners understand the technical interface between joinery and structure.
Full specification sheets, performance data, and installation guidance are available on request.
Available as open-in or open-out windows.
Threshold and cill profiles tailored for brick-to-brick, check reveal, or rendered openings.
CAD drawings and specification sheets are provided on request.
Our quality & service are very important to us…
What Our Customers Say
We’re proud to be rated Excellent on Trustpilot, with genuine feedback from our clients who have chosen our timber windows and doors windows.
