All lumber used for outside finish should be thoroughly seasoned, clear, smoothly dressed, and free from imperfections tending to impair its use, durability, strength, or appearance. Poplar is the ideal building material for outside finish. It takes paint better than other woods used for this purpose. However, pine is generally used, for the reason that it is cheaper. Weather-boarding is usually laid with an inch lap four and one-half inches to the weather; three and one-half inches is better.
Drop siding, or German siding as it is sometimes called, makes a warmer and better wall than weather-boarding. It is usually six or eight inches wide, and in form and construction as indicated by [Fig. 34].
Outside shingle walls are now quite common. Shingles are used for ornamental purposes in a large proportion of the houses that are built; in some instances they are used exclusively for outside covering. In such cases they are undressed, and are stained commonly with one of the proprietary stains now on the market. Before being placed they are dipped into the stain for about eight inches from their buts, and are laid in piles to dry. Any desired color may be secured, and there are instances where stained shingled walls have gone without any attention or expense for eight or ten years.
Dressed shingles are commonly painted. Their form may be as ornamental as desired. Outside shingles are sometimes laid five and one-half inches to the weather, but four and one-half is better. It is not uncommon at this time to leave all shingles unpainted and unstained. The effect is very agreeable when they become weather-stained.
OUTSIDE CASINGS.
All horizontal trimmings and casings should be bevelled on the top to shed the water. They should run back under the shingled weather-boarding or other outside covering. There should be tin covering for all projections in excess of one and three-eighths inch. Ordinary window or door casings outside are usually three-eighths inch thick.
WINDOWS.
All windows in the part of the house regularly occupied should have box frames. Pulley styles should be of hard wood, and the inside bead should be secured with round-headed screws. Sash for plate glass should be one and three-fourths inch thick; side rail, two and one-half inches in rabbet; bottom rail, three and one-eighth inches; and meeting rail, one and one-fourth inch in the rabbet. Sash for common glass may be one and three-eighths inch thick. Other sizes, as given. Sash, for rooms finished in hard wood is better when of the wood in which the room is finished. However, where there is great variation this is not necessary. Quartered oak is the material commonly used for hard-wood sash. Almost any hard wood is more liable to warp than pine. All box frames should be provided with turned axle pulleys. Nothing but the best plaited cotton sash-cord should be used. Necessary weights should be provided.