and through the use of an elongated section of clamping strip 15 which has an integral outwardly and downwardly hook flange 16 formed continuously thereon and inwardly of its upper and lower edges a perspective view of a section of the clamping strip may be seen in fig3 and in fig2 of the drawings the clamping strip 15 will be seen installed with the uppermost flange thereof which is tapered as at 17 pushed upwardly so as to be frictionally engaged between the remaining portion of the vertical section 11 of the lower section of metal siding and the upturned arcuate flange 13 of the horizontal section 12 of the upper section of metal siding the arrangement is such that the outwardly and downwardly extending hook flange 16 is positioned immediately below and in contact with the horizontal section 12 of the upper section of metal siding as seen in fig2 of the drawings the lower cutaway section of metal siding 11 is then provided with a plurality of crimped or bulged fastening configurations 18 along its uppermost cut edge as best seen in fig4 of the drawings and then pushed upwardly into frictional engagement with the inner surface of the outwardly and downwardly extending hook flange 16.