Clean the base surface. Laying and bonding of vapor barrier film. Rock slab staggered laying and fixing. Laying and fixing of TPO waterproofing membrane. Measure the overlap size of the coil material. Positioning of overlapping edges of rolls. Overlapping edge machine hot air welding. Hot air welding at the gutter. Fix the closure strip of the parapet wall and apply sealant. Welding of detailed nodes of the skylight.