It is often desirable, for the sake of effect or for the purpose of protecting the lower part of the walls of a building, to arrange a horizontal projecting band or "course," as it is called, which will slightly overhang the lower part of the wall. This is called a "belt course" and usually occurs at or near a floor level or across the gable end of a building at the level of the eaves. A belt course is formed by placing blocks or brackets at intervals against the face of the outside boarding, these blocks being cut to the required shape to support thin pieces of molding. This arrangement is shown in section in Fig. 279. Here, A is the studding, B is the boarding, C is the block or bracket, D is the finish under the block, E is the wall shingling, F shows where the shingles come down over the belt course and the furring G supports the finish and provides nailing surface for the first course of shingles. A similar belt course may be placed on a building with any other kind of wall covering, the principle being the same in every case, and the purpose being always to form a projecting ridge from which the water will drip without injuring the wall surface beneath. Sometimes the wall covering is not brought out over the top of the belt course, but is stopped immediately above it, and in this case care must be taken to see that the top of the course is well flashed with galvanized iron or copper so that the water can not get through the wall around it. It is best to cover the entire top of the belt course with the flashing and to run it up onto the vertical wall 4 or 5 inches with counter flashing over it. The method of flashing will be explained later.

Fig. 279. Details of Belt Course

Fig. 279. Details of Belt Course.