beams such as rafters struts and purlins are also capable of being employed with the present disclosure no limitation as to any of the above is intended by this disclosure as shown roof portion 20 of building 10 includes struts 16 and purlins 18 mounted atop rafters 14 criss crossing metal bands 22 24 are attached to a bottom surfaces of struts 16 and purlins 18 and well as a top surface of the rafters 14 on ends of building 10 i e the end rafters bands 22 24 may be made of steel if desired the steel may be galvanized and painted white for aesthetics the bands may be energy saver fp u2122 banding available from guardian building products sheeting material 26 is installed above bands 22 24 and rafters 14 but below the struts 16 and purlins 18 see fig2 and 3 sheeting 26 can be notched installed in sections etc to ensure coverage of the entire roof area edges of sheeting 26 can be glued in place to maintain a smooth and environmentally tight structure if desired the sheeting material may be energy saver fp u2122 fabric available from guardian building products such fabric provides fall protection strength condensation control fire and smoke retardation and other benefits at least one insulation layer is typically located atop sheeting 26 as shown a first insulation layer 28 is laid parallel to and substantially between purlins 18 and a second insulation layer 30 is laid perpendicularly across the first insulation layer outer roofing material 32 which can be for example formed metal panels or the like is then attached to purlins 18 if.