If the walls were to be shingled, the same care would have to be taken as in shingling the roof, except that the shingles on the walls may be exposed five or six inches and they may be of a quality called "clears," in which the exposed lower third is free from imperfections. Shingling undoubtedly makes a warmer coating than clapboards or siding, as there are always three thicknesses of shingles to one of clapboards; but the choice between shingles and clapboards is generally determined by the character of the building and the effect desired.

Fig. 40. Piazza Joists.

Fig. 40. Piazza Joists.