any insulating material of at least class E-d2 in case of gypsum boards of ≥ 9,5 mm nominal thickness and ≥ 600 kg/m3 core density.
mis tahes substraat vähemalt klassist E-d2 kipsplaatide puhul, mille nimipaksus on vähemalt 9,5 mm ja tihedus vähemalt 600 kg/m3.