The evolution of standards relating to environmental requirements has led to the development of many new insulating materials. This is why, today, it can be difficult to find your way around. Between traditional materials and bio-based insulation, how can you be sure to choose correctly? Should you focus on cost, ecology or comfort? Whether you are planning to build anew house or renovate your home, it is important to know the advantages and disadvantages of each solution for a comfortable and sustainable home. Here are some basic definitions and an overview of thermal insulation materials to help you find your way around.
Mineral wool is the first major family of insulation materials used in the building industry.
It is inexpensive and has the advantage of being thermally and acoustically efficient. For all these reasons, it is often selected for building or renovating a building.
However, it presents some disadvantages: it is sensitive to humidity and increases indoor pollution. Moreover, it is not compatible with ecological criteria...
Three categories of mineral wools can be identified:
The second major family of insulating materials is vegetal wools, which are fully bio-based thermal insulators.
They offer much greater ecological and sustainable advantages than mineral wools, with varying costs depending on the material (straw, for example, is very cheap, but requires more available space).
Examples of vegetal-based materials for insulation:
The third major family is made up of animal wool-based insulation materials.
Animal wool is not easily inflammable and is interesting because it regulates humidity. However, sheep or goat wool, which can be found in rolls or panels, must first be treated with fungicides, insecticides and fire retardants before being used.
This is the case with sheep's wool, which is then sold in rolls or boards.
To conclude this overview, we should mention “thin” insulators, composed of layers of aluminium foil interspersed with layers of felt. These are called “back-up” insulations, as their quality varies according to their thickness. You might as well choose a high-performance insulation from the outset...
Finally, there is synthetic insulation in the form of rigid panels, such as polystyrene panels. Again, this is preferable for correction or reinforcement work.
In short, you get the idea, finding the right thermal insulation material for your building project will depend above all on your objectives, your needs and your budget. For example, for high technical performance and low cost, mineral wools are the best choice. However, if you prefer to avoid irritating materials, choose animal wool (which is generally more expensive). If ecology is important to you, choose vegetable wools (whose price varies greatly depending on the material). Finally, for reinforcement work, opt for thin and synthetic insulation!