How to make a shelf for installing color steel tile riser

1, lay the roof first, starting from one side, and then laying it from left to right or from right to left in turn. When laying the first board, install a guide line on the board surface, and it will go down vertically along the lower edge. Each board needs to be laid according to this guideline to prevent the position deviation during laying.

2. After laying, it should be fixed with screws, preferably with self-tapping screws.

3. At the lap joint of the edge material, fix it with nails first, and then stick it with glue to achieve the purpose of rain protection.