In connection with the back plastering, may be done the fire-stopping of plaster or bricks, the principal points being to build up on the underpinning behind the sill to the underside of floor with brick, not only to prevent the spread of fire, but to prevent rats from going from the cellar up into the walls and so all over the house. On the top of girders the same thing should be done, and if they support partitions, the brick work should be carried up between the studs for a distance of three courses or more above the floor. (Fig. 31.) By repeating this upon each partition cap and upon the girts of the outside frame, the whole house will be cut up into compartments and the circulation of fire and vermin materially checked. In the case of a balloon frame where no girt occurs, it is customary to run the floor boards out between the studs and to build up on these with the bricks. A further precaution and a valuable one is to lay a few courses of bricks upon the bridging of partitions; this will cause any fire which may be started below, to break out into the room, where it will be discovered before it is likely to reach the story above. The spaces between stair stringers and around chimneys should also be protected by fire stops of brick or plaster. Furring and Finish. As soon as the roof is on and boarded, the gutters will be put on and the roof shingling begun. The position of the gutters must be carefully noted to be sure that the edge is on a line with the roof boarding, otherwise the gable finish will not work out right. The position of the conductors should be determined, and the gutters set with a slight fall toward them, and holes for the lead goose-necks should be bored, in order that no water shall stand in the gutters. With the completion of the gutters the shingling or slating of the roof can be commenced, and before the roof is completed the furring of the inside will be taken up.

Fig. 31. Brick Filling.

Fig. 31. Brick Filling.

Fig. 32. Horizontal Bridging of Partition.

Fig. 32. Horizontal Bridging of Partition.

Fig. 33. Diagonal Bridging of Partition.

Fig. 33. Diagonal Bridging of Partition.