The sidewalls were first clapboarded, because we were afraid the roof
would not hold us until the framing had been strengthened by nailing on
the siding. Slab boards were used for this purpose. Beginning at the
bottom, the boards were laid on, each lapping over the one below, as shown
in Fig. 141, so as to shed water. In each side we cut a window opening and
nailed on a window casing of the type shown in Fig. 142, which will be
described in a moment. As soon as the clapboards were applied, we nailed
on the rafters and then applied the roofing. The same principle was here
used for shedding water. The lowest board was first laid on, and then the
others were successively applied, each lapping over the one below.
[Illustration: Fig. 141. Nailing on the Clapboards.]
[Illustration: Fig. 142. The Window Casing.]
[Illustration: Fig. 143. The Window Sash.]
The window casings we used each consisted of a frame about 15 inches
square, but with the upper and lower pieces extending 12 inches beyond one
of the side pieces. On these extended pieces a slideway was formed for the
window sash by nailing on two strips of wood about 3/4 inch square and
over them a pair of wider strips projecting inward, so as to overlap the
edges of the sash.
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