Presentation of the different types of interior wall insulation for individual and collective housing.

This article describes the different types of internal wall insulation for individual and collective housing.

Why insulate house walls? The second biggest source of heat loss in a home, after the roof, is poorly insulated walls. To improve home comfort, you need to invest in high-performance insulation that effectively reduces thermal bridges. This investment will quickly pay for itself in savings on energy bills.

Why insulate walls from the inside? This type of thermal insulation is all the more effective if it is installed when the building is constructed. Insulating walls from the inside is also particularly suitable for renovations and new homes, especially where the local town-planning scheme prohibits altering the appearance of the facade in such a way as to prevent the installation of insulation from the outside.

In renovation projects, the installation of interior wall insulation is highly effective, but slightly reduces room surface area. However, interior insulation can also be used to repair existing wall defects, such as cracks or unsightly bulges.

There are three techniques for insulating walls from the inside: bonded complex panels, lining with framing or masonry back-up walls with insulation.

A masonry back-up wall or framed lining is a wall built in front of another. It provides better thermal and acoustic insulation. The space between the two partitions is usually filled with an insulating material.

Knowing the advantages and disadvantages of each of these techniques enables you to choose the best solution for your performance requirements and budget.

For each solution, we provide as much information as possible on the description of the materials, the details of implementation, the advantages and disadvantages.

We do not give precise figures for strength, fire safety, acoustics or thermal performance. This information, which changes regularly, can be consulted on manufacturers' websites, and is specified in the Avis Techniques and DTUs, which are regularly updated.