How to calculate the U-value for the outer wall?
120 x 60 Brick
25 mm Air gap (well-ventilated)
30 mm Climate board (mineral wool)
145 mm Mineral wool with vertical studs 45x145 c/c 600
45 mm Mineral wool with horizontal wooden studs 45x45 c/c450
12mm Plywood
13mm Gypsum
