Before finish-coat application of Portland cement plaster, the base coat should be _____?

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Prepare for the CR-21 Landscapes and Irrigation Test. Utilize flashcards and multiple-choice questions featuring hints and explanations. Get exam-ready!

Multiple Choice

Before finish-coat application of Portland cement plaster, the base coat should be _____?

Explanation:
Moistened. Before the finish coat goes on, dampen the base coat to a light, damp condition. This reduces the suction from the base coat and makes the surface receptive so the finish coat can hydrate properly and bond well. If the base coat is completely dry, the finish coat can draw moisture too quickly and bond poorly, leading to adhesion issues or surface cracks. A lightly damp surface provides the best balance: it supports bonding without oversaturating the base.

Moistened. Before the finish coat goes on, dampen the base coat to a light, damp condition. This reduces the suction from the base coat and makes the surface receptive so the finish coat can hydrate properly and bond well. If the base coat is completely dry, the finish coat can draw moisture too quickly and bond poorly, leading to adhesion issues or surface cracks. A lightly damp surface provides the best balance: it supports bonding without oversaturating the base.

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