Timber Casement windows offer timeless appeal, elegant functionality, and design flexibility, making them a preferred choice for both heritage restorations and modern new builds. At Mumford & Wood, we manufacture a wide range of bespoke wooden Casement windows, each tailored to complement the character of your home while delivering exceptional performance.
Here, we explore the most popular types of timber Casement windows and where they work best.
Flush Casement Windows
Flush Casement windows feature a sash that sits perfectly flush with the frame, creating a clean, streamlined appearance. Their understated charm makes them a favourite in both conservation areas and modern architectural settings.
Key Features:
- Sleek, flat exterior for a minimalist aesthetic
- Exceptional draught sealing and thermal performance
- Ideal for planners requiring traditional detailing
Perfect for: Period properties, listed buildings, and contemporary spaces seeking a subtle, refined exterior.

Side-Hung Casement Windows
Side-hung Casement windows are a classic style where the sash is hinged on the side and opens outward, similar to a door. They offer excellent ventilation and easy operation.
Key Features:
- Traditional design with flexible opening options
- Excellent airflow and unobstructed views
- Can be specified as single or double sashes
Perfect For: Rooms where ventilation and visibility are a priority, such as living areas or bedrooms.
Top-Hung Casement Windows
Top-hung Casement windows are hinged at the top and open outward, often used in combination with fixed panes or other styles for functional versatility.
Key Features:
- Allows airflow while maintaining privacy
- Rain-resistant when partially open
- Compact and discreet design
Perfect For: Bathrooms, kitchens, or upper-storey rooms where privacy and controlled ventilation are essential.
Fixed Casement Windows
Fixed Casement windows are non-opening units designed to frame uninterrupted views and bring in natural light. While they don’t open, they offer exceptional energy performance and visual clarity.
Key Features:
- Maximum glazed area for uninterrupted sightlines
- Superior thermal and acoustic insulation
- Often used alongside operable windows for a unified design
Perfect For: Feature windows, stairwells, or panoramic views where ventilation isn’t needed.
Double Casement (French-Style) Windows
Double Casement windows open outward from the centre, resembling a set of French doors, ideal for creating a grand opening and connecting indoor spaces with the outdoors.
Key Features:
- Elegant symmetry and wide openings
- Excellent for natural ventilation
- Enhances flow between interior and exterior spaces
Perfect For: Traditional homes, garden rooms, or anywhere you’d like to amplify your connection to the outdoors.
Arched Casement Windows
With their curved head detail and arched Casement Windows, these windows introduce soft architectural lines and elevate the space's aesthetic.
Key Features:
- Graceful, characterful design
- Available as fixed or operable
- Custom-made to fit unique apertures
Perfect For: Historic buildings, ecclesiastical conversions, or homes with classical design features.

Bay Casement Windows
Bay Casement windows extend outward from the wall, creating a light-filled alcove or feature area inside the home. These often combine fixed and operable casement panels.
Key Features:
- Expands internal space and light
- Offers a sweeping exterior view
- Blends fixed and opening panels for balance
Perfect For: Lounges, master bedrooms, or any room that benefits from an architectural focal point and a touch of grandeur.
Selecting the Right Style for Your Project
Choosing the best timber Casement window depends on your property’s location, architectural character, and design goals. Whether you're seeking traditional elegance, weather resistance, or a minimalist aesthetic, Mumford & Wood offers a tailored solution to suit your vision.
All our timber windows are handcrafted using sustainably sourced timber and finished with a factory-applied, microporous coating for lasting beauty and resilience.
Begin Your Journey with Mumford & Wood
From Flush Casements to arched designs, our window collection offers flexibility without compromise. Every frame is made to measure, combining architectural heritage with 21st-century performance.
Request a brochure, explore our full collection online, or contact our team for a tailored quote. Let’s bring your project to life with beautifully engineered timber windows from Mumford & Wood.


















