The Content Of The Article:

Insulation is a key element in the comfort of a home. A well insulated habitat keeps the heat in the winter and stays cool in the summer. Insulating with eco-materials means paying attention to the fact that the materials used are part of a global approach to sustainable development in terms of their components, their manufacture, their implementation and their recycling.


Hemp is the ecological plant par excellence. Naturally resistant, it does not require a herbicide, insecticide or fungicide for its cultivation. It has excellent insulation against cold in winter but also against heat in summer. It has the ability to absorb the humidity of the air, without alteration of its insulating qualities, and to be able to restore it when the atmosphere becomes too dry. It is not irritating and is easy to recycle.

It is used for thermal and sound insulation of walls, partitions, floors and roofs. It comes in the form of loose wool or straw, rolls, semi-rigid panels or bricks. Mixed with lime, it allows for insulating slabs or insulating coatings.
It can be mixed with linen and cotton.


Just like hemp, flax requires little fertilizer and even fewer pesticides to grow and its qualities are identical. It can absorb up to 10 times its weight in water without losing its insulating characteristics.

It is used for thermal and sound insulation of floors and roofs. It comes in the form of rolls, panels or in bulk. Incorporated with lime, it allows for insulating coatings.
It can be mixed with hemp and cotton.

Sheep's wool

If the sheep wool is an excellent thermal insulator, its treatment is less. Generally the wool is washed with soap and soda and protected by an anti-mite. We will therefore prefer unwounded raw wool despite its smell. But it keeps the soot that naturally protects mites. Fortunately it disappears with time.

Hollow fiber, wool can absorb more than 30% of its weight in water without losing its insulating qualities. In summer, it will naturally regulate the hygrometry. Hardly flammable, it is also light.
The wool is a very good thermal insulation recommended in altitude. It comes in the form of rolls, panels, loose wadding or felt.
There is also recycled wool wadding.


Naturally, wood is an excellent insulator in winter and even more so in summer to preserve heat. Permeable to water, it regulates the ambient hygrometry.
It comes in wool or wood fiber. The wood wool is in the form of flexible or semi-rigid panels or bulk for the insulation of lost attics, walls and under roof. Wood fiber panels are stiffer. They are used to insulate partitions, walls or floors.

The cork

Made from the bark of cork oak (which is harvested without damaging the tree), this insulation is versatile, rot-proof and lightweight. It is particularly efficient for sound insulation.
The expanded cork is composed of bark reduced in granules and agglomerated under the action of the resin naturally contained in the material.

In the form of panels, it is used for thermal and sound insulation of walls, floors and ceilings. In bulk, it allows the insulation of attics lost or mixed with sand and lime to make insulating slabs. The light bulb presented in rolls is perfect as an insulating underlay under a floating floor.

Expanded carbon beads

Those are carbon beads (3 to 5 mm in diameter) expanded with steam. They are rot-proof, hydrophobic, insensitive to fungi and mold. Very light (only 16 kg / m3) and fluids like water, they are very powerful even in thin thickness. They are ideal for the interior insulation of partitions and floors without overload and without settlement. The balls weave through every nook and cranny, even the most inaccessible to other types of insulation.
Mixed with concrete, they allow the construction of slabs lighter and insulating qualities reinforced.

Did you know?
Thermal bridges are a source of great heat loss, which is why it is important to identify them and reinforce their insulation. They are located at the junction points between walls and floors or roofs as well as at the doors and windows. In a well insulated house, they can represent more than 30% of the losses.

Video Instruction: Fire Testing Insulation Materials