After completing the framework,

Board up the Sides, fitting the boards around openings and corners as neatly as possible.

The Roof is a very important factor in a building of any kind, and care should be taken to make it of water-proof material, for a leaky roof will not only ruin the interior but make it damp and thus unhealthy. Tar-paper will be found a good roofing material, inexpensive, and easily put on. First cover the roof with boards placed about one inch apart. Then cut the tar-paper into lengths equal to the width of the roof. Commencing at the lower edge of the roof tack one strip in place. Lap a second strip two inches over the first, a third two inches over the second, and so on until the entire roof is covered. [Figure 185] shows a tin cap and nail made especially for this kind of work. The cap is punched to fit over the nail, and prevents water from running into the hole made by the latter. It will be unnecessary to coat the paper with tar, as there is sufficient in its preparation to keep it water proof a long time—probably longer than the house itself will be allowed to stand.

Fig. 185.

The Floor should not be laid directly upon the ground, but be supported upon four-inch sleepers set as shown in [Fig. 186], with cinders rammed in between them. The bed of cinders should not be more than three inches thick, so there will be an inch of air space between them and the floor. This will help to keep the floor free from dampness. Four-inch boards stood on edge will do very well for the sleepers.