Installing self-supporting roofing system eliminate the possibility of a bird building their nest as there is no truss to support their nest. Thus it helps to provide cleaner and hygienic building environments.. #trussless #archroofing #galvaume #Iroofingsheets #Iroofingworks #simplysupported #halfarch #roofingsheets #roofingcompany #archroofingindustry #keralabuilders #keralaarchitecture