Energy renovation: the advantages and performance conditions of aluminium joinery

According to the French National Union of Window, Façade and Related Construction (SNFA), windows and doors play a significant role in a building's energy efficiency. The trade association, citing the French Agency for Ecological Transition (ADEME), indicates that glazed surfaces can account for up to 15% of heat loss.

Performance depends on the glazing and installation

Equipped with thermally broken profiles and suitable insulating glazing, aluminum windows can limit heat loss in winter. Their glazed surfaces also promote natural solar gain, although the effectiveness of this depends on the orientation of the openings and the building's design.

In summer, bay windows must be combined with appropriate sun protection to limit overheating and the need for air conditioning. The quality of the installation, particularly the airtightness at the junction between the window frame and the building structure, also remains crucial for achieving the expected performance.

More natural light and architectural possibilities

The mechanical strength of aluminum allows for the design of slim profiles and large glazed surfaces. This characteristic promotes the entry of natural light, strengthens the connection between the interior and exterior, and facilitates the creation of large openings.

According to the SNFA, the thermal performance of current joinery can also help to reduce the feeling of cold walls in winter and improve comfort near windows.

For 2026, the professional organization is highlighting nature-inspired shades such as mineral grays, sand, sage green, and terracotta, alongside black, anthracite, and deep blue. Matte, textured, and wood-effect finishes are also expected to gain popularity.

Bicoloring, on the other hand, allows you to choose a different shade for the interior and exterior faces of the joinery, in order to match both the facade and the layout of the dwelling.

Renovation grants available under certain conditions

In 2026, window replacement may benefit from several support schemes, subject to compliance with their technical criteria and conditions relating to housing, household income and the nature of the work.

MaPrimeRénov' can, under certain conditions, finance the replacement of single-glazed windows as part of a "renovation by gesture" program. Using a certified professional (RGE) and submitting the application before work begins are required.

The zero-interest eco-loan and the reduced VAT rate can also be used for certain energy renovation projects. Eligibility and the amount of aid must be verified on a project-by-project basis before signing any quotes.

The industry wants to strengthen the recycling of removed joinery.

The SNFA (French National Union of Aluminum Manufacturers) indicates that the aluminum sector is continuing to develop systems for collecting, sorting, and recycling end-of-life joinery. It aims to eventually recycle all aluminum doors and windows removed during renovation or demolition work.

However, the environmental benefit depends on the effective collection of old joinery, its referral to a suitable channel and the quantity of recycled material reintroduced into the manufacture of new products.