Correct alignment is very important, regardless of what type of roof structure is used. Only in this way can it be mounted closely and neatly. For the gable roof, the vertical line should be 50-70mm from the inside of the sidewall, and the horizontal line should be 150mm from the lower purlin.
Place the first board as close as possible to the vertical construction line, fix it on the first tile of the second vertical row relative to the load-bearing frame. The first row should not be perforated in any way.
Fixing elements should be mounted on the ridge of the tile.
Great care must be taken when aligning the first row. Because even a few millimeters of misalignment per plate will cause problems for long boards.