Types of Windows: a guide to the most innovative models and opening systems

Starting with the basics: what is a window made of?

A window can be defined as an opening in the wall that allows light to enter and air to flow, between the inside and outside of the building. Typically, doors and windows consist of four main components: the frame, the sashes, the hardware and the glass.

The frame is the fixed structure attached to the wall, while the sashes are the movable parts (often referred to as “panes”). The hardware includes the metal components that enable assembly and movement, such as hinges and locking systems, which are essential for home security. Lastly the glass, which can be double or triple-glazed, is mounted inside the sashes and secured with glazing beads.

All window types, along with entrance doors and interior doors, fall under the category of “fixtures” – those architectural elements designed to divide and insulate spaces, ensuring protection, comfort and functionality.

Casement windows (with tilt and turn openings)

Let’s start with the classic casement window, which usually has a square or rectangular shape. Modern window designs offer not only the standard opening we’re all familiar with, but also the tilt-and-turn option: this feature allows the upper part of the sash to tilt inward by turning the handle 180° upward.

Another remarkable feature of modern windows, included as standard in DQG models, is the micro-ventilation system: this ensures consistent air circulation, preventing humidity and mold without compromising indoor heat.

Bottom-hinged windows (with vasistas opening)

Vasistas windows (also called hopper or bottom-hung windows) are ideal for small or specific spaces like bathrooms, garages, or storage rooms.

These windows allow ventilation and natural light passage without occupying additional space; they can also be installed in hard-to-reach places and equipped with a secondary handle or motorized opening for a more practical use.

Fixed, arched and odd-shaped windows

A fixed window is a non-opening fixture that can be made with large frames and minimal size restrictions: they are perfect for creating striking effects in spacious living areas, visually expanding the space and forming a seamless connection between the indoors and outdoors.

Additionally, fixed windows don’t always have to be square! It’s possible to choose for windows in many shapes, such as rounded edges or triangular and trapezoidal designs.

Lift-and-slide doors and windows

Doors and windows with lift-and-slide systems are perfect for large walls, maximizing natural light passage and creating a seamless visual connection with the outside.

The sliding mechanism allows even large glass panes to open easily: the sash is slightly lifted off the track to ensure a smooth opening, while ensuring a hermetic seal when the window is closed.

Tilt-and-slide doors and windows

Doors and windows with tilt and turn slide systems are perfect for medium-to-large openings, featuring sashes that align perfectly when the fixture is closed.

When opened, the sash slides inward before moving parallel to the fixed sash: that’s how tilt-and-turn sliding doors and windows combine modern aesthetics with practical functionality and optimized space.

Parallel sliding doors and windows

Doors and windows with parallel sliding systems are particularly suited for warm climates, verandas, terraces or commercial spaces such as hotels and restaurants.

This system features a fixed sash and a sliding sash that moves horizontally on an aluminum track: parallel sliding fixtures typically allow configurations with one or more sliding sashes, up to a maximum of four, offering both flexibility and practicality.

French doors and balcony doors

French doors facilitate access to outdoor areas and allow natural light to flow indoors. Modern models can be designed in very large dimensions, featuring tilt opening systems or aluminum thermal-break thresholds: these innovations help eliminate architectural barriers while optimizing the insulation of the fixture.

Compared to French doors, balcony doors serve as a secondary entrance. They are characterized by reinforced sashes for enhanced stability and security, along with dual handles – one installed inside and the other outside.

Explore all types of windows made by DQG

Choosing the best window types for your home means finding the perfect balance between aesthetics, functionality and comfort. With so many types of fixtures available on the market, it’s essential to carefully assess your specific needs.

If you’re considering purchasing or upgrading your doors and windows, and would like to receive expert support, DQG is here for you! Explore our product range and technical details, or contact us for personalized advice and learn how we can help you.