The filling makes the difference! Poroton knows it best with their Perlit-filled bricks. The natural and ecological insulant made of volcanic rock is applicable in every kind of low energy residence, it is light, non-inflammable, free of pollutants and fumes, does not evoke allergies and is not infested by vermin. The very high static pressure resistance enables stability and masters every weight.

+ natural and ecological insulant made of volcanic rock
+ light and non-inflammable
+ free of pollutants and fumes
+ very high pressure resistance