Thermoprofile purlins are cut with millimeter precision to the exact sizes needed according to production drawings so there is no waste, with each piece having its place. The panels are 85% insulation material and have a U-value of 0.16 W/m2K, while being compact for transportation, and a team of 3 men plus a project manager can assemble small houses in 1-2 days and bigger houses around 1 week.