Another method of draining a cellar is to excavate below the level of lowest mason-work, and fill in a depth of about twelve inches with broken stone, which is given a drain connection with proper outlet. The space between stone particles acts as a drain.
MASON-WORK.
The mason-work should be of brick or stone. First, we will consider that of brick, which is common to frame houses and is sometimes used for brick buildings. The foundations, walks, piers, and flues should be of hard burned brick. All should be laid wet, excepting in freezing weather, with lime mortar. The outside exposed brick should be preferably of a dark cherry-red color, laid in white or red mortar. The latter is in most general use. The joints for exposed work should be in form as indicated in Fig. 30; in mason’s parlance, these are called “rodded joints.” The joint is first cut down from above, with trowel, then the rod is placed along the upper edge of the joint, and the mortar is cut away with a knife in the form indicated. Then the vertical joints are trimmed in the same way; thus no mortar projects beyond the face of the brick. This form of joint is desirable for all kinds of exposed work, where one desires better work than is usual in foundations and other exposed brick work. Brick work should have struck or common joints in the cellar and outside exposed walls, only where small cost is of great importance. Brick work should be left rough where it is desired to plaster. Foundation walls and piers usually continue from sixteen to thirty inches above grade; twenty or twenty-four inches is most common. On this is placed a sill in most frame houses. Outside walls and piers generally begin from eighteen to thirty inches below grade line, where not influenced by the cellar. In an ordinarily cold climate the freezing line is four or five feet. Eighteen inches or two feet is usual, however, in the construction of frame buildings, and the results are not unsatisfactory. A damp-course of slate or hard limestone is sometimes placed just above the grade line, to prevent the passage of moisture from the brick wall below to that above. These general statements as to brick work apply alike to that used in brick and frame buildings, as do also the statements as to interior walls, chimneys, etc., which follow.
To prevent the passage of moisture through brick walls below grade from the outside, a coating of Portland cement is sometimes used. Coal-tar is also used, but is not as good as the cement.
CHAPTER XXVIII.
BRICK FOUNDATIONS.—LAYING BRICK.—COLORED MORTARS.—COLORED BRICKS.—BRICK VENEERING.—HOT-AIR FLUES.—DETAILS OF BRICK CONSTRUCTION.—CHIMNEYS AND FLUES.—HOLLOW WALLS.—CELLAR.—ASH-PITS.—GRATES.