‹‹‹ Vitr. 7.4.2 | Table of Contents | Vitr. 7.4.4 ›››
3They are then to be whited over with lime and water, that the first coat may adhere to them; for, from the dryness they acquire in burning, they would neither take that coat nor sustain it, but for the lime thus interposed, which joins and unites them. The first coat being laid on, the coat of pounded potsherds is spread, and the remainder is finished according to the rules above given.
3Then, whitewash them with lime and water so that they will not reject the rendering coat of burnt brick. For, as they are dry from the loss of water burnt out in the kiln, they can neither take nor hold the rendering coat unless lime has been applied beneath it to stick the two substances together, and make them unite. After spreading the rendering coat upon this, apply layers of burnt brick mortar instead of sand mortar, and finish up all the rest in the manner described above for stucco work.