Joists 
Sheathing 
Waterproofing 
Nest Boxes 
1 inch back on the 2X4 studs, so that when the door is closed it will butt 
against the studs and lintel and keep out the cool air. The door may be 
f-inch hemlock, the same as the walls, but made with vertical strips; 
and it should be held together with two f-inch by 8-inch-wide cross-timbers 
and one f-inch by 8-inch-wide diagonal brace inside, as shown. On the 
door screw securely two 4-inch iron T hinges and use a latch, clasp, and a 
good padlock. 
Roof 
Run lengthwise of the building from sidewall to sidewall two 2XG 
selected, straight-grained joists, securely spiking the ends to the studs. 
Cover the top with hemlock sheathing 8 or 10 inches wide and f-inch 
thick, running the boards from front to back and allowing both ends to 
project 1 foot. Nail the end boards so they will project over the side walls 
3 inches. Nail all these boards securely with 8-penny nails. 
Cover the entire roof with waterproof roofing felt. Begin with a 
horizontal layer at the back of the roof, running from sidewall to sidewall. 
Then put on succeeding layers with asphalt cement between them at the 
joints, and give an overlap of 3 inches at each seam. Nail the seams 
3 inches apart with f-inch nails and tin disks. These come with the roofing 
felt. Turn the felt down 2 inches all around the edge of the roof and nail 
it securely with tin disks 3 inches apart. 
Cover all the walls and the door on the outside with roofing felt, making 
the joints vertical. Overlap, cement, and nail them close with nails and 
tin disks. Be careful to have no opening at the wall heads for cold air 
to blow through. 
Interior Equipment 
Build of f-inch material, and as a separate fixture, a row of 8 nests, 
and screw them against the studs under the windows. The bottom may 
Fig. 2 
be of two 8-inch boards. The front board should be 4 inches wide. The 
back may be made of two 8-inch boards. The partitions between the 
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