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Why Choose Aluminium Windows for a Sustainable Home

13 May 2023

A home that meets the principles of environmental sustainability is equipped with windows that help to respect the environment and avoid wasting energy. Aluminium is a recyclable and sustainable material that is perfectly suited to green requirements.

An environmentally sustainable home is a choice that requires specific investments and measures.
However, they pay off enormously: not only in the knowledge of having contributed to the fight against the climate emergency, but also in energy savings and the creation of a healthy and comfortable environment for tenants. Those who make this choice can also count on incentives and deductions promoted by the state.

Sustainable windows for a modern home

Achieving a modern and environmentally sustainable home means thinking in terms of virtuous resource management all round, dedicating oneself to the elimination of waste, dispersion and inefficient practices.

The transition to an environmentally sustainable home certainly involves masonry work and high energy class appliances, but to a large extent also the installation of environmentally sustainable windows and doors made of recyclable materials such as aluminium. New technologies have provided efficient housing solutions with low environmental impact, in which windows and doors play a fundamental role in ensuring respect for the environment and energy efficiency, without ever sacrificing the highest level of living comfort.

The basic features of an environmentally sustainable window frame

In order to truly comply with the principles of eco-sustainability typical of bio-architecture, when choosing a window, one must ensure that it is:

  • efficient: it must provide excellent thermal insulation to avoid heat loss and, consequently, energy wastage;
  • recyclable: made of a material that can be recycled without losing its characteristics;
  • durable: to minimise the costs required for replacement and disposal;
  • sustainably produced: it must not contain lead or other volatile organic compounds that are particularly harmful to the environment. Processing waste must be recycled, the water used for its production recovered.

A truly eco-sustainable window frame is always so, at every stage of its life: from its initial production to its transport, from its installation to its recycling.

Aluminium: environmentally sustainable material for ecological window frames

The choice of windows and doors can make a very important contribution to the realisation of an eco-sustainable project, in terms of respect for the environment and energy efficiency. In particular, the choice of aluminium as a material for eco-sustainable windows, i.e. designed to have the lowest possible environmental impact, is advisable from several points of view.

Aluminium is a 100% recyclable material

A material is recyclable when, having completed its cycle of use, it can be processed so as to be reintroduced into the production cycle. This results in a circular economy that minimises the impact of this material on the environment in terms of waste and emissions. Using a recycled material means reducing the costs and resources used for its production: this translates into less consumption, raw materials, greenhouse gas emissions, incinerators and landfills.

Aluminium is an exemplary champion of recycling. It can be completely recycled at the end of its life cycle. Secondary aluminium obtained by recycling remains identical to primary aluminium and does not lose any quality or mechanical properties. Moreover, it is an easily processable material, which makes recycling much cheaper and quicker than extracting it for primary production; thus, production costs can be cut without affecting quality.

As a recyclable material in such virtuous terms, aluminium is a truly sustainable (and therefore very up-to-date) solution for the latest generation of window frames.

Aluminium is an extremely durable material

Thanks to its natural and powerful resistance to oxidation, aluminium guarantees solidity and a truly superior durability compared to wooden or PVC frames. In fact, aluminium frames can last up to more than 50 years without ever deteriorating or reducing their efficiency.

This is an advantage of aluminium also from the point of view of eco-sustainability. Its long service life reduces costs and energy waste due to the disposal of end-of-life windows.

Aluminium provides thermal insulation and high energy efficiency

The elements that contribute to the thermoregulation of a building are mainly the windows and doors, with their ability to thermally insulate and modulate the passage of hot and cold air from the inside to the outside of the house and vice versa. For a house built according to the principles of bio-architecture, therefore, thermal insulation is a fundamental imperative that windows and doors must be able to guarantee.

Aluminium windows and doors are made with a special thermal break, so there is no contact between the temperature outside and inside the house; this prevents heat dispersion, ensuring warm rooms in winter and cool rooms in summer. This is fundamental to ensuring an environmentally sustainable home, as the absence of dispersion allows for much less use of the home’s heating or air conditioning systems, resulting in energy efficiency2. The latter not only saves on energy bills, but also helps to reduce greenhouse gas emissions and the demand for fossil fuels for energy production.

Aluminium saves on artificial lighting

Resistant, ductile, solid: thanks to its characteristics, aluminium is able to support large weights without requiring excessive bulk. For this reason, it is the ideal material to use in situations that require high mechanical resistance, such as the construction of large windows or curtain walls; all without the need for supports and still being able to rely on slender, thin profiles.

With an aluminium frame, large openings can be made in the walls, such as French doors or large windows.
This will allow a large amount of natural light to enter3, which will lead to considerable savings in the electricity used for artificial lighting.

All the other advantages of aluminium

We have seen how aluminium lends itself very well to the creation of frames that fit perfectly into an environmentally sustainable living context, but aluminium has many other characteristics.

It is a lightweight, corrosion-resistant, absolutely non-toxic material that requires minimal maintenance. Due to its robustness, it provides excellent burglary protection4, thus increasing the degree of security in the home. Because of its ductility, it can be customised in all possible forms; thanks to oxidation and painting, it takes on all the colours and finishes to meet any aesthetic requirement.

In this article you can learn more about the unrivalled qualities of aluminium for window frames.

Sustainability guaranteed by METRA Building aluminium windows and doors

In the context of today’s construction industry, a successful company cannot fail to take into account aspects of energy efficiency and environmental ethics.

In this sense, METRA Building has always been committed to ensuring the highest possible degree of respect for the environment.


  • the aluminium used in all METRA Building products is 100% recyclable;
  • the low-carbon alloys used have high percentages of recycled aluminium in them;
  • processing waste is recycled in its entirety within the same plant;
  • production is always energy-saving and characterised by water and flue gas recovery.

The aim is to keep the concept of production circularity in mind at all times, to make all production, design and sales phases involving the company virtuous.

In addition, METRA Building equips all its products for home automation. Thanks to this technology, it is possible to manage windows and shutters5 remotely, thus maximising their efficiency during different parts of the day.

Finally, an aspect that should never be underestimated in the path towards an eco-sustainable home is the installation and laying of the elements. Installing a window frame incorrectly, for example, can affect the performance of the frame itself by up to 70%, thus affecting its insulation and energy efficiency capabilities. METRA Building places experience and competence at the client’s service, carrying out a careful analysis of the living context and an installation that is always impeccable.