The sandwich panels' packaging and stacking for transport are done according to directives of the producer company and are transported without damage until the assembly site is reached. Every panel type has its own stacking method and quantity according to its thickness, isolation type, metal type and thickness and production length. Directives of the producer company are carried out with maximum care in order to obtain the most economical transport.
Packaged sandwich panels on the assembly site are lifted via cranes, using lifting equipment to spread them on the steel construction of the roof if possible; stored in a clean and safe area near the assembly site together with wall panels if not.
Wall and roof panels, with enough mounters according to their production lengths, via motorized mounting equipment and with the construction qualifications of the building in mind, are assembled according to its method and the chosen screw type. Assembly style, type and assembly equipment properties are affected by the panel's being polyurethane or rockwool, and by the subconstruction's being steel, concrete, prefabricated or space truss.
If on-site assembly is preferred for roof systems, all assembly and application basis changes. Using this system, assembly components are stacked separately and assembled with anti-condensation tapes and accessories.
Membrane system roof claddings are initially mounted on the existing subconstruction using appropriate screws according to its method with sandwich membrane panels (premade polyurethane or rockwool and polyurethane). Membrane overlaps on the longer side of the panels are then welded via specific welding robots and heaters in order to obtain total insulation.
Using on-site assembled membrane systems, a first layer of rockwool vapour barrier is inserted after having optimized the trapezoidal type and the metal thickness considering the subconstruction beam spaces and thicknesses. Membranes are then mounted on the rockwool using specific screws, according to the directives of the producer company and considering the wind uplift forces.
For membraned flat roofs, membrane is mounted on a solely concrete subconstruction using different isolation materials but using the same methods.
For snap-lock system roofs, beacuse of aesthetic concerns, OSB plates or Z-profiles are appropriate to use over the isolation layer. On-site assembled snap-lock system with width range of 30 to 60 cm or prepainted galvanized steel or aluminium is then installed via special accessories and methods on the top of the roof.