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Casement Windows: What They Are and Characteristics

31 October 2022

Casement windows are probably the most common choice when a window is needed. They are practical, easy to clean and well suited to any environment. Here is an article on everything you need to know about casement windows: what they are, features, types, pros and cons.

Doors, windows and balcony doors have a casement opening in most Italian homes. This is the most traditional type of opening because it has several advantages, primarily functionality. When it comes time to choose windows or doors, it is good to keep in mind all the characteristics of casement windows, the different types and how they can fit in with the style and aesthetic requirements of the house. Of course, the casement window must meet all the most important requirements: excellent thermal and acoustic insulation, robustness and security.

To understand how best to meet your needs, it may be useful to read a comprehensive comparison of casement and sliding windows.

What are casement windows

Before exploring the different types, it is important to understand what casement windows are.

They take this name when one or more sashes open by rotating on fixed hinges, which allow them to rotate more or less completely. In contrast to sliding windows, in which usually one sash always remains closed, casement windows allow the sashes to open fully, guaranteeing air exchange, brightness and functionality.

Features of casement windows

The casement opening is chosen for windows of traditional dimensions, with sashes that not exceed 80 centimetres in width. They can have one, two or even more sashes, opening outwards or inwards, as well as fixed parts and alternative opening solutions. Hinged windows open and close with a handle and guarantee a very high degree of tightness; this provides excellent thermal insulation, which is beneficial for the energy efficiency of the house.

Casement windows are the ideal solution for homes and offices. They adapt perfectly to any style and requirement, especially when combined with the most appropriate choice of material. For example, METRA Building casement windows, made of aluminium, are finished with high quality hardware, meet every housing requirement, and are an excellent solution for both modern homes and renovations.

Types of casement windows

There are different ways of opening a casement window: they all have in common that the sash opens and closes by turning on fixed hinges. The width of the opening, the type, the visibility of the hinges and other small features vary. Each type of casement window has its advantages. It is essential to rely on professionals who know how to recommend the most suitable one for the different needs of each individual room in the house.

Fixed frame window

A window that shares the typical characteristics of the casement solution, but without the possibility of being opened. It cannot therefore perform the function of air exchange, but still allows light to pass through, and guarantees excellent levels of thermal insulation and burglar-proof security. A window of this type is mainly installed to obtain a light point in the room, in a context where there is no space or need for a casement opening.

Single casement window

As mentioned earlier, a casement window can consist of a single vent that opens and closes by swinging on hinges placed on the vertical side of the window itself, either to the right or to the left as required. This window has a modern character and promises excellent thermal and acoustic insulation; it can exist alone or combined with a fixed window, which allows light to enter the room.

Double casement window

If the size of the room allows it, or if you are obliged to for historical and town-planning reasons, you can install double casement windows. This is the most classic type of window you can find: the two sashes open centrally and pivot on the hinges on the left and right. It is generally a wide window, which therefore allows for excellent brightness and a very effective exchange of air.

The performance in terms of thermal and acoustic insulation and air tightness is excellent, thanks to the pressure that the vent exercises on the gasket on the frame.

Bottom-hung window

The bottom-hung window is a very special type of casement window because, although it also pivots around fixed hinges, it does not allow the sash to open fully. In this case, the sash only opens partially at the top, about 10-15 centimetres inwards.

The basic purpose of the bottom-hung window is to allow air to pass through so that rooms can be ventilated in a controlled manner, even in cold temperatures and adverse weather conditions.

It is the ideal solution for those rooms (small bathrooms, attics, garages, etc.) where you want to ventilate and illuminate the room with natural light and a minimal footprint. Even more convenient, there are motorised bottom-hung windows. A small motor, which can also be added at a later date, allows the window to be opened and closed remotely by pressing a simple switch.
This is the ideal solution in the case of windows located high up and inconvenient to reach.

Top-hung window (Projecting window)

A special version of the bottom-hung window is the projecting window. It has an opposite opening mode: the fixed hinges are on the upper frame, and the sash opens downwards towards the outside. This type of window is suitable for rooms such as offices and attics.

Tilt & Turn window

This type of casement window is the ideal solution for combining the best of both the casement window and the casement window. The window casement can be opened casement inwards and bottom-hung at the top. Simply move the handle to different positions to achieve the desired opening.

Even in bad weather, the casement window can be opened to ventilate the room in a slow and controlled manner without opening the window fully. By turning the handle by 90°, the window can be opened fully to ensure a more rapid exchange of air and to wash the panes in a much more practical way. This is a very popular type of casement window as it meets all functional and living requirements.

Vertical or horizontal pivot window

Of the various types of casement windows, the pivoting window has a single sash that pivots around hinges installed in the centre of both sides of the frame, either at the side or at the top or bottom. The sash can thus rotate 180° on a horizontal or vertical axis, providing a very large opening surface with optimal air exchange.

There are many advantages of the pivot window. It allows very large and easy-to-clean glazed surfaces without mullions; brightness and air exchange are guaranteed.

It is a great design solution, which allows you to give ‘character’ to rooms. In some cases, it is possible to mount the pivot window on an off-centre horizontal or vertical axis.

Pros and cons of casement windows

The fact that the casement window is the most popular type of window in Italy is due to the fact that it is very ductile, practical, functional and efficient.

The various types of casement window allow the window to be opened and closed according to different mechanisms, thus meeting multiple needs in everyday life.
Generally speaking, casement windows offer excellent performance in terms of thermal-acoustic insulation and burglar-proof security: a great advantage when combined with a suitable choice of glass. Aluminium casement windows are strong, yet lightweight, easy to maintain, secure and well insulated. You can read more about all the advantages of aluminium windows here.

The pros of casement windows include:

  1. brightness of the rooms;
  2. easy cleaning of glass surfaces;
  3. excellent external visibility;
  4. room ventilation.

Among the cons, there are two disadvantages of the classic casement window.

Firstly, in most cases the sash opens inwards, causing an obstruction that could prevent freedom of movement and the presence of furniture elements near the window

Secondly, the size of the frame. When the sash is fully open, its weight rests entirely on the hinges on which it pivots: for this reason, it is a good idea to choose the right accessories for the size of the frame.

How to choose casement windows

There are different types of casement windows, each with its own characteristics. The advantages and disadvantages must be carefully considered to be sure that the window frame you choose is suitable for the living and architectural requirements of your home.

How to choose the right casement window? This article is an introduction to the subject, which, however, will have to be considered together with a professional in the sector, who can identify the most suitable type for the customer’s needs, based on thermal-acoustic insulation, burglar-proofing, brightness, available sizes and the design of the house.

METRA Building casement windows meet all the functional and stylistic requirements of any home. Manufactured in aluminium (here is an in-depth study on why to choose an aluminium window frame), they are equipped with perfect mechanics prepared for home automation, ideal for a modern, technological and efficient home.