Facebook-f
international windows group logo uk

Timber Casement Windows

Discover the timeless charm and modern performance of timber casement windows, crafted to enhance your home’s aesthetics while providing exceptional energy efficiency and security.

casmenet windows budowa 1

What Are Timber Casement Windows?

Casement windows are designed to open outward, much like a door.
Available in top-hung or side-hung configurations,
they are also commonly referred to as:
  • Hinged windows
  • Side-hung windows
  • Outward-opening windows

Rooted in history and widely used across the UK,
modern wooden casement windows have embraced contemporary advancements
in window technology.

These versatile designs not only surpass their historical counterparts
but also rival the traditional box sash windows. With a wide range of
customisation options, casement windows effortlessly blend
with your home’s envisioned aesthetics, making them a perfect choice for any style.

Discover more

Key Benefits of Timber Casement Windows

Explore the key benefits of timber casement windows, including versatile design options, enhanced energy efficiency, and improved security features, all crafted to elevate your home’s style and functionality.
Learn more
Wide variety of design

Choose from different types such as push out, tilt-and-turn, outward-opening, and many more.

Improved Energy Efficiency

Reduces heat loss, helping to lower your energy bills.

Improved Security

Features a multi-point lock system for enhanced security.

Technical Specifications
& Colour Options

Explore the wide range of technical details and colour options available for our casement windows. From high-quality wood materials, advanced glazing, and versatile opening mechanisms, to custom paint finishes and seals – our products are designed to offer flexibility, durability, and aesthetic appeal. Select from a variety of colour finishes to seamlessly match the style of your home, and discover how our technical features ensure top performance, energy efficiency, and security for years to come.

WOOD

Soft wood: pine, Hard wood: meranti, accoya, oak and other 3 layer glued engineering wood

STRUCTURE

Traditional Open out and Tilt and turn European system (open in)

PROFILE

Classic, Flush casement

PAINT

Scumbles emphasizing wood structure, opaque in full RAL palette, 4-layer system for painting with highly dilutable ecological Sikkens paints, single and double colored joinery

GLAZING

Standard: “thermofloat” glazing Ug= 1,1 W/m2K optionally: Safe and anti-burglary window panels, absorptive and reflective panels, sound absorption panels, ornament, satin panels

OPENING

Side-hung with a possibility of sliding the sash vertically in order to facilitate cleaning from the inside of the room, Tilted to the outside, Fixed glazing

HANDLES

Standard: Securistyle with a key

SEALS

Q-lon made by Schlegel

SILICONE

Bilateral silicone covering

GEORGIAN BARS (OPTIONAL)

Mullions in colors of RAL palette bilaterally glued in a color of the window, traditional „leads”

SPACING FRAME

Aluminum – standard plastic – colors: silver, black, light brown, dark brown – optional warm

ADDITIVES

Ventilator, opening limiter, sills
kolorysash

ACCESSORIES & OPTIONS

Explore a wide range of accessories and options designed to enhance the style and functionality of your windows. Choose from various finishes and designs to perfectly match your needs and preferences.

CHROME

GOLD

SATIN CHROME

WHITE

Timber Casement Windows – Traditional Craftsmanship with Modern Performance

Timber casement windows remain one of the most popular window styles across London thanks to their clean appearance, excellent ventilation and outstanding thermal performance. At International Windows Group, we design and install bespoke wooden casement windows that combine traditional joinery with advanced glazing technology to meet modern expectations for comfort, security and efficiency.

Whether you are renovating a period property or upgrading a contemporary home, timber casement windows provide a refined architectural look while significantly improving insulation. You can view completed installations in our portfolio.

What Makes Timber Casement Windows a Smart Investment?

Unlike sliding designs, casement windows open fully outward, allowing maximum airflow and unobstructed views. This makes them particularly effective for improving indoor air quality while also increasing natural light.

For homeowners comparing styles, our timber sash windows offer a more traditional vertical aesthetic, while casement windows deliver a cleaner, more contemporary profile.

Exceptional Energy Efficiency with Double Glazing

Our double glazed timber casement windows are engineered to minimise heat transfer and reduce draughts — an essential factor for properties throughout Greater London. High-performance glazing paired with precision seals helps maintain stable interior temperatures and lower heating costs.

To understand how our systems are constructed, you can review detailed specifications in our technical drawings.

Flush and Classic Profiles to Suit Every Property

We offer both flush casement windows for a sleek, heritage-style finish and classic storm-proof designs for enhanced weather resistance. Each window is manufactured from carefully selected timber such as engineered pine, meranti, accoya or oak — materials known for their structural stability and longevity.

All finishes are available in a full RAL colour palette, allowing you to match existing architectural details or create a completely new look.

Security Without Compromising Design

Security is integrated into every window through multi-point locking systems, reinforced glazing options and premium hardware. These features provide peace of mind while maintaining the elegant proportions expected from high-quality wooden windows.

Our manufacturing standards are supported by verified documentation available in the certificates section.

Tailor-Made Wooden Casement Windows

Every home has different structural and visual requirements, which is why our timber casement windows are produced to order. From opening configurations to glazing upgrades and decorative elements such as Georgian bars, each detail can be customised to suit your property.

If you are planning a full exterior upgrade, you may also wish to explore our timber front doors or elegant French doors to create a consistent appearance throughout your home.

Expert Installation Across London

Even the highest-quality window performs poorly without precise installation. Our experienced teams manage the entire process — from consultation and measurement to final fitting — ensuring airtight performance and long-term reliability.

Learn more about our approach on the About Us page or  contact us directly to arrange a consultation.

Upgrade Your Home with Timber Casement Windows

If you are considering timber casement windows in London, our specialists can guide you through the available options and recommend solutions tailored to your property. Combining natural materials with modern engineering, timber windows remain one of the most durable and visually appealing investments a homeowner can make.