A treatise on architecture and building construction . , and eaves, around scuttles, sky-lights, gables, flanks of dormer-windows, etc. 163. On hip roofs, where angle rolls are not used,pieces of flashing are laid on the /iij? over each courseof shingles or slate inthe same manner thata shingle or slate itselfwould be laid, if it couldbe bent to fit around thecorner as shown at a, For, while the jointsbetween the various piecesof roof covering may bebroken, or alternated, asat d, in the main flatslopes, the hips must havea continuous row of jointsfrom the eaves to theridge, as at c, an
A treatise on architecture and building construction . , and eaves, around scuttles, sky-lights, gables, flanks of dormer-windows, etc. 163. On hip roofs, where angle rolls are not used,pieces of flashing are laid on the /iij? over each courseof shingles or slate inthe same manner thata shingle or slate itselfwould be laid, if it couldbe bent to fit around thecorner as shown at a, For, while the jointsbetween the various piecesof roof covering may bebroken, or alternated, asat d, in the main flatslopes, the hips must havea continuous row of jointsfrom the eaves to theridge, as at c, and theinsertion of flashings un-der the shingles, at thesepoints, prevents the waterthat would work its waybeneath the covering fromgetting into the interior, and carries it to the flat slopes,where it may harmlessly run off. 163. In valleys the means adopted are different, as theconditions are in some respects reversed. On the hip ofthe roof there is no accumulation of water at any time, andwhat little may fall there is immediately drained off by the. Fig. 09. 94 CARPENTRY. pitch; but in the valley we have a depression between twoslopes, and all the water falling- on each of them is immedi-ately carried to the valley. The valley, therefore, acts in the capacity of a gutter, andis flashed accordingly. The tin is joined, generally at theends, to form a continuous gutter in the depression, and itsedges are turned up under the shing-les about G inches. Theshingling is not carried down to the intersection of theslopes, but is stopped about 5 inches from the valley rafter,and the gutter, thereby, is left open. The flashing of all suchsituations will be treated in detail in SJiect-Mctal Work. 164. Along the ridge the roof is rendered water-tightby a number of different methods, two of which are illus-trated in Fig. 70,{a) and {p). At {a)is a method used ona shingle roof andrequires no flash-ing, while at (/-) ametal flashing isused on a slate,. orflat tile, roof. At{a) the ridge plate
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