NF P50-761*NF EN 12939:2001 Thermal performance of building materials and products - Determination of thermal resistande by means of guarded hot plate and heat flow meter methods - Thick products of high and medium thermal resistance.
2001NF P50-761*NF EN 12939:2001 Thermal performance of building materials and products - Determination of thermal resistande by means of guarded hot plate and heat flow meter methods - Thick products of high and medium thermal resistance.