When adding stories to the iron shed, it is necessary to cover the iron with tiles, then fix them with nails, fix them with cement at the junction of the house, then cover the tile ridge, fix them with screws at the lower end of the tiles, and finally seal them with glass glue.

The roof of the tin shed is relatively light in size, convenient to install, good in sealing, waterproof and free from water leakage in the house.