It is much easier to square a roof without the strength of the elements of the wall structure. Once the roof coating or roof steel is in place, it's much easier to drill into the corners of the building. With the roof in place and the walls open, a concrete slab can be installed if desired. Having the roof finished before the wall straps are placed helps protect the poured concrete from the elements, especially rain or heat in summer.
Premixed trucks can access and pass through any accessible side or end. This can negate the need to pay for a pump truck. In many cases, with the plans of the purchased house, the details of the construction of the roof are included, including the design of the beam. Building Design + Construction reported that “this alternative process for constructing tall concrete or steel buildings consists of a permanent movable roof, a roof lift mechanism, a protective enclosure and a high-capacity elevator.
The construction of roof structures is one of those carpenter skills that seems quite complicated and, in fact, some roof designs are difficult. Next, a protective metal and canvas cover is installed up to the parapet, which protects the construction site against inclement weather, while the roof lift mechanism allows the roof to move upwards as each floor is completed.