When you Installed the rafters in the right way and attached them to the mauerlatians, it is to start a crates that is nailed surpendicular to the rafters with No more than Fifteen Centers for the Slate and Big Step For Other Coatings. Any Selected Waterproofing Material is Rolled to the Crate, and the Proper Material Itself Is Laid in Accordance with the Prescribed Technology. In Fact, The Assembly Is Quite Simple and Does Not Require Any Special Knowledge Or Skills.