This allows you to get light, durable, reliable roofing material of the widest spectrum of colors and textures. It will not be superfluous to learn more about the construction of monolithic foundations.
Small weight (standard sheet of 0.95 x 2 m weighs no more than 5.5 kg) allows you to use ondulin even on the old roof or not to change the crate, provided that it meets the technological requirements: when tilting the roof to 10 degrees — the frame should be continuous, at 10-15 degrees-a step of axes up to 45 cm, at 15 degrees-not more than 61 cm.