Trapezoidal sheeting is profiled sheet metal with repeating trapezoidal ribs and troughs. The profiling increases stiffness and allows large-format roof and wall cladding with comparatively low material use.
What is trapezoidal sheeting? Function and classification
Depending on the profile and material thickness, the sheeting may serve solely as external cladding or also as a load-bearing component. Profile direction, supports, overlaps and fastening determine load transfer and water flow.
Practical use
Trapezoidal sheets are aligned on purlins or supporting structures, overlapped and fastened using system-compatible screws. Junctions at ridges, eaves, verges and penetrations are fitted with suitable shaped pieces and seals.
Designs and variants
Steel and aluminium profiles are available with different rib heights, cover widths and coatings. Roof profiles, wall profiles, acoustic profiles and load-bearing decks perform different functions.
What should be considered in practice?
Fastener spacing, screw seating, overlaps and seals must suit the exposure. Cut edges and coatings must not be left damaged. Where the sheeting has a load-bearing function, project-specific structural design is mandatory.
Current technology and development
Sandwich systems, optimised coatings and PV-compatible fastenings extend the range of applications. Digital laying plans reduce incorrect cuts and uncertainty over overlap directions.