With increasingly hot summers, it's becoming essential to consider thermal insulation right from the construction stage of your home. There are many factors to consider for successful summer comfort, and surrounding yourself with the right professionals is even more important in this context. Maisons SIC, builder of new and cool homes for over 50 years, explains how to optimize your summer comfort.
Summer comfort: anticipate the heat before even laying the first stone
Summer comfort is ensure a pleasant temperature inside the home, even during heatwavesThis thermal comfort is prepared from the planning stage, well before the choice of insulation.
Orientation of the house is the first lever to limit solar gain. A main facade facing south, combined with roof overhangs or sunshades, effectively protects against overheating.
Conversely, the openings too many in the west or southwest can turn the house into a greenhouse. Compactness The construction also plays a role: the less surface area there is for exchange with the outside, the less heat enters.
The choice of land also counts. A plot with trees or one well exposed to the wind allows you to take advantage of shade and natural ventilation.
Summer comfort also depends on greening : deciduous trees, hedges or plant pergolas are real natural air conditioners.
At Maisons SIC, these thermal principles are taken into account from the preliminary design stage. The objective is to optimize summer comfort without additional energy costs, by combining architecture and thermal efficiency. This global approach reinforces the effects of the building's thermal insulation.
Which insulation should you choose for a real barrier against heat?
To ensure good summer comfort, the choice of insulation is crucialIt is not enough for it to be efficient in winter: it must also limit heat entry in summer.
To do this, two criteria should be prioritized:
- thermal capacity (ability to store heat)
- thermal lag (time taken for heat to pass through the insulation).
Bio-sourced insulation, such as wood wool, cellulose wadding, or wood fiber, show excellent results on both counts. Their high density allows them to effectively slow the entry of heat, even during a peak in outdoor temperature. In summer, these materials create a real thermal buffer: the interior remains cooler, even without air conditioning.
Cellulose wadding, in particular, offers a very good compromise between performance, price and environmental impact. In bulk or in panels, it is suitable for walls, attics or floors. As for wood fiber, it combines rigidity, thermal efficiency and humidity regulation.
Conversely, mineral wools (glass or rock wool), often used for interior thermal insulation, offer good winter performance, but are less effective in summer. Their low thermal capacity makes them less relevant for combating overheating. In roll thermal insulation, however, they remain interesting for roof thermal insulation when looking for an economical solution.
At Maisons SIC, each solution is studied according to the local climate and the client's expectations. The objective is to gensure sustainable thermal insulation of the building, whether it is thermal insulation of walls, from the inside or from the outside.
Good insulation is one that protects the house all year round.
The crucial role of the roof in thermal regulation and summer comfort
En été, the roof is the surface most exposed to solar radiationIt can alone raise the indoor temperature by several degrees if it is not properly insulated. To maintain summer comfort, it is therefore essential to make it a priority.
One of the first things to consider is the roof's thermal insulation. It slows the transmission of heat between the exterior and living areas. The higher the thermal resistance, the more effective the insulation.
We often use thermal insulation materials in rolls, such as glass wool or rock wool, laid in a double layer under the slopes. Other solutions, such as wood fiber or cellulose wadding, allow for better thermal lag: the heat then takes several hours to penetrate inside, which avoids heat peaks at the end of the day.
Attic ventilation also plays a key role. Poorly ventilated attics retain heat and accentuate the greenhouse effect. Well-designed ventilation allows the evacuation of hot air accumulated under the roof, especially at night, when the outside air is cooler.
Finally, the color of the roofing materials is not insignificant. A light roof reflects more solar radiation than a dark roof. This limits surface heating and reduces the amount of heat transmitted to the interior.
A well-designed and well-insulated roof therefore contributes significantly to the thermal insulation of the building. It acts as a primary factor in keeping the building cool in summer, without resorting to energy-intensive air conditioning.
Walls, windows, floors: every surface counts in summer
During periods of intense heat, the coolness of a home depends on its entire envelope. While the roof remains a priority, the walls, windows, and floors also play a fundamental role in summer comfort.
Exterior walls are particularly exposed. Good thermal insulation of walls, whether installed from the outside or the inside, helps to slow down heat transfer. External thermal insulation is the most effective: it eliminates thermal bridges and protects the building structure from overheating.
Internal thermal insulation of walls, simpler to implement, remains an effective solution, provided that the junctions between walls are correctly treated.
The Windows are sensitive points : in summer, they let in light but also heat. It is therefore essential to limit the greenhouse effect with solar-controlled double glazing, exterior shutters, blinds or sunshades. The orientation of the glazing must also be thought through in advance: avoiding large west-facing windows helps limit overheating at the end of the day.
floors are often forgotten. However, an uninsulated floor can store heat from the ground floor or basement. Thermal insulation from below, when possible, improves overall comfort. In new homes, a layer of insulation is often integrated into the slab.
For ensure complete thermal insulation of the building, each wall must therefore be treated with care. The more the exchanges between the interior and the exterior are limited, the easier it becomes to maintain a stable temperature without resorting to active cooling systems.
Know how to combine insulation and ventilation to avoid overheating
Good insulation is not always enough to guarantee true summer comfort. To avoid overheating, it is essential to consider the building's thermal insulation as part of a comprehensive system, where ventilation plays a complementary and decisive role.
During the day, sunscreens and high-performance insulators (such as external thermal insulation, roof thermal insulation, or internal wall thermal insulation) can slow the rise in temperature. But at night, the accumulated heat must be able to escape.
This is the whole point of nighttime ventilation : by opening windows ideally placed on two opposite facades, we create a natural air current which effectively cools the interior.
In modern constructions, This system can be reinforced by a double flow VMC, which allows controlled air renewal, without energy loss. This type of ventilation recovers calories from the extracted air to preheat or cool the incoming air. It thus becomes a powerful lever for maintaining a pleasant temperature, summer and winter.
At Maisons SIC, we don't just install insulation. We design each house as a coherent whole, where openings, materials, equipment and the use of the home are thought out together. It is this know-how, refined over the course of projects in all regions of the Southwest, which allows us to guarantee our customers optimal thermal comfort, including during peak heat waves.
Call on an experienced professional like Maisons SIC, it is the certainty of having a well-insulated, well-ventilated house that is pleasant to live in for a long time — without energy-consuming air conditioning.
