What method determines finish coat coverage when planning a project?

• A. The product's coverage rate per gallon and area; adjust for porosity and waste.
• B. The painter's favorite brand.
• C. The color chosen.
• D. The time of day.

Answer: (A)

You determine finish coat coverage by using the product’s stated coverage rate per gallon, the total area to be coated, and adjustments for surface porosity and waste. The coverage rate shows how much area one gallon will cover under typical conditions. Multiply that by the total area (and by the number of coats you plan). Then adjust for porosity—porous or rough surfaces soak in more paint and require more gallons—and add a waste factor for spillage and overage. For example, if a product covers 350 sq ft per gallon, the area is 1000 sq ft, and you’re applying two coats: you’d estimate about 2000 / 350 ≈ 5.7 gallons, then add a typical waste allowance (say 10%), bringing it to roughly 6–7 gallons.

Brand, color, or time of day don’t determine finish coat coverage; they can affect appearance or application conditions but not the calculation of how much finish is needed.