Roof construction

Claim 1

In a roof construction having supporting purlins or the like, the combination comprising: a plurality of generally elongated panels each of which has a matching standing seam portion along the marginal edges of the long sides thereof, each standing seam portions having an edge portion of said panel folded back thereover toward the center of said panel, wherein said edge portion has therein a plurality of recesses, forming downwardly facing shoulders; a plurality of support clips supported beneath the adjacent seam portions of two adjacent panels for securing said panels to said purlins, said support clips each having a flat upper surface spaced below and perpendicular to the plane of said standing seam portions and with said upper surface having a slot therein; a plurality of generally spear shaped fastener clips securing said panels to said support clips, each of said fastener clips including a body portion arranged for inserting downwardly between said adjacent standing seam portions and through one of said slots, said fastener clips each including means connected to said body portion for engaging said standing seam portions and means for engaging said support clips after passage of said body portion downwardly through one of said slots; an elongated seam cap generally in the cross-sectional shape of an inverted U, mounted over said two adjacent standing seam portions and over said associated clips, said cap having means for forming upwardly facing shoulders for engaging said downwardly facing shoulders of said standing seam portions, for securing said cap thereover; wherein said upwardly facing shoulders of said seam cap form a first sinuous curve, and said downwardly facing shoulders of said standing seam portion form a second sinuous curve, wherein said first and second sinuous curves are of different periods.