The Layher Keder roof system is a lightweight weatherproof enclosure (using an aluminium modular truss system) that can be assembled in clear spans of up to 18 meters without a crane and larger spans if lifting equipment can be used. In conjunction with keder rails for the wall covering, the entire structure can also be expanded into lightweight temporary building.
Possible applications vary widely and include covering buildings while extra storeys are added, repair of roof trusses and re-roofing, weatherproofing for construction sites, for refurbishment sites on motorways and over bridges, and many other possible uses at events and festivals.
Keder roof systems can provide monopitch roof systems as well as the traditional gable. Keder roof spans of up to 24m have been achieved, roof pitch 20 degrees and bay width 2.57m.