Optimally 40s for

The edges of the rafters form a wooden cornice on the sizes, which depends on the durability of your walls, the larger the cornice, the more the walls will be. The minimum ledge of the cornice should be at least 20 centimeters, optimally 40s for the distribution of uniform load on the walls under the edges of the rafters, the bars are substituted. The rafters are more often installed every 60 centimeters and connected to the log house also with iron brackets. A vapor barrier lies on top of the ceiling ceiling, and it is covered with small slag or sawdust.