In Luxembourg, high temperatures can quickly make a house or apartment uncomfortable. Attics, large bay windows, and facades that are heavily exposed to the sun promote heat accumulation, sometimes lasting late into the night.
However, air conditioning is not the only solution. Several measures can help limit overheating, preserve coolness, and improve the performance of the home year-round.
Block the sun before it reaches the glazing
Glazed surfaces allow a significant amount of heat to enter. Curtains and indoor blinds protect against glare, but they come into play after the rays have passed through the window.
Therefore, exterior solar protections should be prioritized: shutters, slatted blinds, awnings, or adjustable sunshades. Their choice depends on exposure, the size of openings, and the aesthetics of the building. Roof windows require special attention.
Prioritize insulation of the roof and attics
The roof is one of the most exposed areas during a heatwave. A roof heated all day gradually transmits heat to the rooms below, especially when the insulation is old or insufficient.
Strengthening the insulation of the attic or roof slows this progression. The technique and materials must take into account the roof configuration and the desired performance in both summer and winter. The intervention can be carried out from the inside or the outside.
Protect facades from heat
Walls can also accumulate heat before releasing it into the home. External thermal insulation limits these exchanges and reduces thermal bridges, while preserving the living space.
This solution also allows for the renovation of the facade appearance. It requires a study of the supports, openings, and local urban planning regulations.
Organize effective ventilation
Good practices play an essential role. During the day, it is advisable to close windows and solar protections as soon as the outside temperature rises. Ventilation should be prioritized early in the morning, late in the evening, and during the night.
Creating a draft between several openings allows for quicker evacuation of accumulated heat. An appropriate mechanical ventilation system ensures air renewal and helps control humidity. In the context of a comprehensive renovation, its sizing must be consistent with the level of insulation and airtightness of the home.
Reduce internal heat gains
Cooking, lighting, and electrical equipment also increase temperature. During a heatwave, limiting the use of the oven, avoiding devices left on standby, and choosing energy-efficient equipment helps reduce unnecessary heat gains.
A fan can improve the sensation of coolness through air movement. It does not lower the room temperature but serves as a simple complement before considering an air conditioning system.
Air conditioning, a solution to consider with caution
In certain situations, cooling equipment may still be necessary. It must be sized after studying the causes of overheating. Without effective insulation or solar protections, it will need to operate more and consume more energy.
What assistance is available to finance the work?
In Luxembourg, certain energy renovation works may be eligible for the Klimabonus 2026 scheme, including the insulation of roofs, walls, or other elements of the envelope. The conditions vary depending on the nature and scope of the project. A renovation involving multiple elements requires energy advice, while a simplified procedure may apply to a single element under certain conditions. The steps must be anticipated before the work begins.
Entrust your project to Avenir Rénovations Luxembourg
Insulation, carpentry, solar protection, and ventilation must be considered in a complementary manner. Avenir Rénovations Luxembourg offers you comprehensive support with a single point of contact.
Your Project Manager analyzes the needs of your home, advises you on the solutions to prioritize, prepares your estimate, and coordinates the various trades. They then oversee the execution of the project until its completion.
This way, you gain peace of mind and enjoy a more comfortable home during hot weather, as well as better performance in winter.
Do you want to better protect your home against heatwaves? Contact Avenir Rénovations Luxembourg for a personalized study of your project.
