BUILDING MATERIALS 159 



the above materials, comes from the factory very regular in 

 shape and true to dimensions. Fire brick is pressed brick 

 made of fire clay. It is used in fire-box lining and comes 

 in slightly larger sizes than common building brick. Paving 

 brick is a vitrified clay brick which has been annealed. It 

 does not conform to regular brick dimensions. Sand-lime 

 brick is pressed to shape under a pressure of about 175 

 tons per brick and cured in a steam bath. Glazed or enam- 

 eled brick may be any type of brick which has been given 

 a special hard and polished surface. Such bricks are made 

 in regular and special sizes and some special shapes and are 

 used where their impervious or ornamental qualities are an 

 advantage. Facing or finishing bricks of clay are of any type, 

 but are selected from the kilns with the idea of getting an 

 .even run of color. A single kiln may furnish several varieties 

 of finish or face brick. 



Tile made of either clay or concrete is made much the same 

 as brick, the difference lying in the mechanical form of the 

 product. Hollow tile is used extensively for foundations, 

 walls, and interior partitions. 



For concrete and cement mortar, see chapter viii. 



Wall sidings. The oldest and most common material for 

 the siding of ordinary buildings is wood. There are a 

 number of milled shapes of siding which in the order of their 

 popularity are: shiplap, rustic, drop siding, beveled siding, 

 and long-beveled drop siding. A cross between shiplap 

 and drop siding is rustic ; and one between drop siding and 

 beveled siding, long-beveled drop siding. The last makes a 

 very desirable sheeting for light buildings, such as poultry 

 houses, garages, and machine sheds. Its appearance is that 

 of beveled siding, and there is no reason why it cannot 

 replace this for house surfacing. See Figures 118 to 124, 

 pages 117 to 120. 



Stucco . The popularity of cement has encroached to some ex- 

 tent upon that of lumber as an outside covering for buildings. 

 For composition and application of stucco, see chapter viii. 



