To have a representative and fair indicator, we need to use the standardised indicator “total primary energy” which takes into account all energy consumptions of a product during its complete lifecycle from the extraction of raw materials making up the material to its end of life (demolition and recycling or landfilling).
Energy consumed to make glass wool is mainly used to melt the sand and recycled glass (“cullet”) and cure the binder in an oven. The use of recycled glass reduces the melting energy consumption. The life cycle analysis of glass wool compared with most of other insulation products including those made of animal or vegetal raw materials such as hemp wool to choose a product sold by Isover, shows that glass wool consumes less energy than the others.
In addition, the energy savings related to glass wool are much higher than the energy consumed to manufacture it even if including the all life cycle. After few months of use, the savings are compensating the consumption 

Back to FAQ list