Types Of Windows

Along the course of their evolution, windows have changed substantially, both in appearance, construction materials and easiness of operation. Their current classifications reorganise old and new features, as follows.

According to their shape, windows can be:

Rectangular (encompassing the majority of windows worldwide)


Circular (in Europe, these are rare and added solely for decorative purposes);

Arched (composed of a rectangle with an arched top, common in historic buildings).

In addition to this, the materials window frames or sashes are made from results in the following classification:

Wooden windows, which have been manufactured for centuries and are seen as the most aesthetically valuable, also providing the advantage of thermal resistance. They do however require regular maintenance such as painting and will deteriorate in time, requiring a renovation process and possibly repairs, as wood tends to swell and corrode when exposed to the natural elements.

Steel windows are preferred by some due to their enhanced durability and low maintenance needs, as well as the fact that many are made from recycled steel and are recyclable.

Aluminium windows are inexpensive, durable and low maintenance, and also fit into the recyclable category – nonetheless, they have little thermal resistance.

Vinyl or PVC windows are very common nowadays and although they don’t require maintenance their lifespan can be reduced in certain condition, as vinyl is not as durable as other materials. They are also less attractive than traditional timber windows. Also, they are sometimes reinforced with durable metals to increase their resistance.

Fibreglass windows suit modern decors and are very durable. Due to the fact that they are not as aesthetic as wooden windows, some manufacturers clad them in wood in order to attain the appearance of traditional windows, which are known to appeal more to customers.