Monolithic floor coverings

The suggested monolithic floor covering can find application in the following venues ... 

Nonisocyanate Polyurethanes for Use in Monolithic Industrial Floor Coverings and Coatings... 

If it is desired to apply either monolithic toppings or acid brickwork to timber floors, it is best, first, to verify that any anticipated loading will not cause visual deflection of the floor surface. If any movement at all is visible, additional supports must be supplied, or the floor and supports rebuilt. Next, sand the floor surface until a smooth, uniform surface has been attained, then nail over it sheets of marine plywood, at least %" thick, making sure that all edges are carefully matched, with absolutely no open cracks between them anywhere, and that the nails are all countersunk and covered smoothly with plastic wood to a uniform smooth surface. 

The floor should not be made of tiles (to avoid joints where contamination might accumulate) but should be covered with a monolithic, impermeable material, which should be continuous from the floor to the walls, without edges. 

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