CONSTRUCTION OF HOUSES 173 



the roofing over the edges of the building and cement- 

 ing it make all joints absolutely air and water tight. 



Double Floors 



The floors are all built double. The under floor 

 may be of any kind of rough boards, and carefully 

 covered over with one ply roofing of any good quality, 

 the laps, as elsewhere in the building, being, care fully 

 cemented and nailed down with large, flat headed, gal- 

 vanized nails made for the purpose. The upper floor 

 should be of a cheap quality of tongued and grooved 

 boards, well driven up and securely nailed. Prefera- 

 bly this upper flooring is laid crosswise of the building. 



The outside of these buildings is covered with any 

 cheap, rough boards obtainable. These should be se- 

 curely nailed over the studding of the building, and 

 then covered with a good grade of two ply roofing 

 paper. On the sides and ends of the building the 

 roofing should be put on upright, but on the roof it is 

 better to lay it lengthwise of the building and lapped, 

 on the plan of laying shingles, the joints all being se- 

 curely cemented and nailed down, and then the joints 

 and nails painted over with cement, to make sure 

 against any possible leaks. 



The inside walls of the building are lined with one 

 ply roofing, with the joints carefully nailed and ce- 

 mented, and then both walls and ceiling are covered 

 with matched flooring. This gives four inches of 

 dead air space to all the walls of the building, making 



