Monolithic terrazzo is a mixture of portland cement, marble chips and water, so constructed as to be directly bonded to or integral with the prepared concrete slab. The terrazzo should be five-eighths an inch thick. Monolithic terrazzo is an economical type of terrazzo developed to give the architect a terrazzo floor at low cost. This type of floor should not be confused with other types of terrazzo floors. The concrete slab should be clean and free from all other materials. Mortar or lime, or any other material left on the slab which may cause failure of the bonding action should be removed. The pitch of the floor and the mixer location are important factors to be considered. Starting at the corner, the terrazzo mix should be placed in windrows 15 to 20 feet long along two walls, at a thickness of five-eighths of an inch. These windrows should then be troweled to a level surface. The third windrow should then be placed at right angles to one to the first two and troweled to the same level. This covers the placing of the materials for the entire floor and the direction in which the straightedge will be moved in screeding the floor. This is highly important as a guide. Successive windrows are then placed, and the areas between them filled and screeded to a level surface in one continuous operation. The floor is then hand-troweled and any low area filled with terrazzo mixture and retroweled. The floor should be sprinkled with a wet mixture of marble chips. These chips must be wet so as not to absorb water form the floor surface. Any terrazzo mixture which directly abuts an outside wall should be separated form the wall by one layer of saturated roofing felt, or other suitable material. Rolling should be started along the walls at right angles to the direction in which the floor was screeded. After the rolling of the area has been completed in lone direction, it is then rolled at right angles to the first direction, and finally on a 45 degree angle. The floor is cured bor 6 days.