How to estimate the price of thermal insulation work per m² in a simplified way?

Thermal insulation is an essential investment for reduce your energy bills and improve the comfort of your home. But how can we determine the cost of this work per square meter? Here is a complete guide to help you estimate the price of thermal insulation.

Understanding the different types of insulation

There are several methods for insulating your home, each with their own costs and benefits:

External insulation: This method involves wrapping your house with an insulating coat. It is effective but more expensive, due to the materials and labor required. Benefits include better overall thermal performance and a reduction in thermal bridges. However, Work may require scaffolding and exterior finishes, increasing costs.

Interior insulation: Less expensive than exterior insulation, it involves installing insulating panels inside the walls. This method can reduce living space, but it is ideal for renovations where the exterior appearance must not be modified. Costs are generally lower because the work is less complex and does not require scaffolding.

Attic insulation: Attics can be insulated by blowing, panels or rolls. This is one of the most cost-effective and effective methods for improving the energy efficiency of your home. Insulating unused attics is often less expensive than converted atticsbecause the materials can be applied directly to the attic floor.

Floor insulation: This method is less common but can be very effective, especially for older homes with poorly insulated floors. It can reduce heat loss through the ground and improve the thermal comfort of living rooms.

Factors influencing the cost of thermal insulation

Several elements can affect the price of insulation work:

The type of insulating material: Materials such as glass wool, cellulose wadding, or expanded polystyrene have different costs. Ecological materialssuch as hemp or wood fiber, may be more expensive but offer environmental benefits. Thermal and sound performance of each material can also influence the price.

The surface to be insulated: The larger the surface area, the higher the total cost will be. However, the price per m² may decrease for large areas thanks to economies of scale. A larger house will require more materials and labor timebut the cost per unit area can be reduced.

The complexity of the work: The accessibility of the areas to be insulated and the current condition of your home can influence the cost. Old houses may require additional preparations, such as removing existing materials or repairing damaged structures. Irregular shapes or structural obstacles can also increase the cost of the work.

Labor : Artisan prices vary depending on the region. It’s important to compare several quotes to get the best value for money. RGE certified craftsmen (Recognized Guarantor of the Environment) can offer additional guarantees and allow access to certain financial assistance.