The coach-house need not be closely adjoining the harness-room, though in small establishments it may be convenient to place it so. In depth it should be about the same as the stable, i.e. 18 feet in the clear. The length will depend upon the number and class of vehicles to be accommodated. Although few carriages, even with lamps, exceed 7 feet in width, the doors should never be less that 8 feet wide, and are better made 9 feet or over. There is a great convenience in making the doors to slide, as when hung with hinges they are liable to be blown about by the wind. This can be accomplished by a little manipulation of the piers, and the sliding doors are generally hung with sheaves at the top to run along an iron bar. There should be small rollers at the bottom to reduce the friction. The floor may be laid with smooth flags, either natural or artificial, or concrete, but in this case especial care should be taken of the quality of the cement and sand used, as concrete may be very good or very bad according to the materials of which it is made. Asphalt is sometimes used, but is liable to become soft in extremely hot weather. Tiles are not desirable, for the risk of breakage. A coachhouse should always have the means of being warmed. As before stated, in small places it sometimes adjoins the harness-room, and a slow-combustion stove is placed in a recess in the division-wall between, but in larger places a separate means of heating by hot - water pipes will be necessary, and, as in the case of the harness-room, some provision should be made for ventilation.