THE ADVANTAGES OF GLASS WOOL
Insulation is necessary in order to minimise dispersions and glass wool is one of the best insulating solutions on the market.
Eurofibre offers products and solutions with certified and reliable performance that are able to reduce thermal dispersions in an efficient and long-lasting manner. The main feature of any insulating material is its thermal conductivity or "lambda" (λ).
Thermal performance of two or more insulating products must be compared by this parameter and not, as it often happens, by their densities: the lower the thermal conductivity the better the insulating capability.
Those products with a thermal conductivity lower than 0,065 W/(m·K) are defined as "insulating products". Glass wool has a thermal conductivity between 0,045 W/mK and 0,030 W/mK, when measured at 10°C. This value also varies with the density of glass wool.
Energy efficiency and cost/efficiency ratio.
In order to make a fair assessment of energy efficiency and cost/efficiency ratio, it's necessary to take into consideration the Thermal Resistance. This is defined as the ratio between the thickness of the insulating material and the thermal conductivity (R = s / λ as m²W/K). Since the retail price of the product depends on the ratio between the quantity of insulating material over a certain surface (expressed in kg/m²), sometimes it may be more convenient to use thicker and less dense materials with the same thermal efficiency. This becomes clear with the chart below.
A higher thermal resistance can be obtained by using a material with a lower density but a higher thickness. As a result of this the cost per sqm becomes more convenient.
|Resistance to airflow||kNs/m4||>5||>10||>15||>25|
|Resistance to airflow||kNs/m4||>5||>12||>18||>30|