Internal float and set is a traditional method of coating the interior of constructed walls. It is by far, the most common and cost effective, smooth finish available, predominantly used in covering or hiding unwanted brickwork.
Firstly, a cement mortar consisting of Portland cement, lime and sand is applied to the brick face. Given time to semi-set, the applicator will then work the material with specialist tools and create a straightened flat and true grey in appearance first coat, also known as a base coat.
This finished coating now requires curing. Because the substrate contains water which needs to fully dry and cure, you must allow at least 1-2 weeks as all cementious products shrink as they set.
During this period installation of ceilings and perimeter cornices are installed. Now your rendered walls are ready to receive a white set coat that consists of lime putty and hardwall plaster- (a gypsum based compound that when combined will harden .) This white creamy paste is troweled onto the base coat. The coating is worked by passing a trowel over its surface to produce an even smooth flat finish. Allowed several weeks to cure this final coat is followed by a suitable paint coating.