Semi-rigid URSA TERRA Panel Papel P1051 mineral wool panel, according to EN 13162 standard, non-hydrophilic with high mechanical performance, with kraft paper. Supplied in panel. The product is recommended for brick walls. Properties: Reaction to fire: F Thermal conductivity coefficient:0.037 W/mK; thermal resistance R=1.35 [m2K/W] -thickness 50[mm], thermal resistance R=1.60 [m2K/W] -thickness 60[mm], thermal resistance R=2.00 [m2K/W] -thickness 75[mm], thermal resistance R=2.15 [m2K/W] -thickness 80[mm], thermal resistance R=2.70 [m2K/W] -thickness 100[mm], thermal resistance R=3.20 [m2K/W] -thickness 120[mm], thermal resistance R=4.05 [m2K/W] -thickness 150[mm],