Heat is transferred from the outside through the insulation structure in three main ways:

• by conduction along the insulation material (lambda value)

• by radiation

• by moving along the air currents inside the insulation (convection), or along the air leaks (construction defect) occurring through the insulation structure.

The thermal conductivity (lambda value) of thermal insulation describes how little the insulation conducts heat. The actual air-binding capacity of the insulation has not been taken account in these theoretical values, but it strongly effects the actual thermal insulation capacity. The better the air remains inside the insulation, the better the thermal insulation capacity of a material and the superb insulation capacity of Ekovilla is based on this very property.

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The most effective thermal insulation solutions come from nature. Creatures living in cold conditions are especially well adapted to extreme cold – their guard hairs are hollow, containing plenty of insulating air. Between guard hairs they also have furry down hair which prevent air from moving inside the coat. Ekovilla offers the same superbly natural kind of warmth for your home.

The material of Ekovilla insulation is natural wood fiber. Inside the fibers are cells – these contain pockets of air and keep the air still, forming a very effective thermal insulation. There is also plenty of insulating air between the Ekovilla fibers, this is achieved by milling the fibers in a special way during the manufacturing stage. This way the fibers become short, fluffy and interlocking, forming a loose thermal insulation which locks the air inside.

The forming air pockets are very small, which prevents any unwanted airflow inside them. Regardless of installation method (blowing, spraying or insulation slab), Ekovilla has minimal air permeability which is an important feature, especially in wall structures.

The temperature difference between the sides of insulation causes airflow (convection) inside the insulation material. The warm air on the inside tends to rise and the cold air on the outside tends to fall. The denser and fluffier the fibrous material storing the air, the smaller the cooling effect on the structure.

The airy pocket of wood fibers and the air circulation inside the pocket create a levelling effect.

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The breathable Ekovilla product has the ability to level the humidity of indoor air (see Breathable for more information)

The humidity of indoor air also effects how we experience the warmth in our home. At the right humidity, the room temperature may be lower, yet we experience it as pleasant as when the temperature is a couple of degrees higher, but the air is too dry or too humid. This means that in a properly insulated home you can drop the indoor temperature without compromising comfort.

Even a drop of one degree saves about 5% of heating energy.

The Ekovilla insulation has high moisture capacity, meaning it can absorb moisture from the room air without losing its insulating properties. The insulation receives and releases air humidity depending on the environmental situation. The pleasantly cooling effect of a breathable structure in summer heat is based on this very property. When the structure is heated by the sun, the humidity stored inside evaporates and dissipates into the air, cooling the structure (phase change). This property brings free comfort to the living space.

One of the requirements for a warm insulation structure is that air should not be able to pass through it. This is prevented by an air barrier installed on the inner surface of the structure. The breathable Ekovilla insulation is used together with our water vapor permeable air barrier sheet.

Ekovilla solutions in decades of experience have proven such houses to be extremely airtight in numerous airtightness measurements.