CSLB C-33 Painting & DecoratingPlanning and EstimatingEasy
A painting contractor is preparing a bid for a commercial office building project. The specifications call for a specific brand of low-VOC (Volatile Organic Compound) interior latex paint to be used on all walls and ceilings. The contractor has used this brand before and is familiar with its coverage rate of 400 square feet per gallon per coat. The total surface area to be painted (walls and ceilings combined) is 20,000 square feet, and two coats are required. How many gallons of paint should the contractor estimate for this project, assuming no waste?
- A100 gallons
- B400 gallons
- C200 gallons
- D50 gallons
Show answer & explanationAnswer & explanation
Correct answer: A. 100 gallons
To calculate the total paint needed, first determine the total area to be covered across all coats (20,000 sq ft * 2 coats = 40,000 sq ft). Then, divide this total area by the paint's coverage rate per gallon (40,000 sq ft / 400 sq ft/gallon = 100 gallons).
Why the other options are wrong
- B. This amount is significantly more than needed for this project, indicating an overestimation of paint.
- C. This would be the amount needed if the coverage rate was 200 sq ft/gallon, or if only one coat was applied to 80,000 sq ft.
- D. This would only cover one coat if the coverage rate was 200 sq ft/gallon, or two coats if the coverage rate was 800 sq ft/gallon.
Paint Material Quantity Takeoff
The process of accurately calculating the amount of paint and related materials required for a project based on surface area, coverage rates, and number of coats.
- Involves measuring surfaces (walls, ceilings, trim).
- Considers paint coverage rate (sq ft/gallon).
- Accounts for the number of coats required by specifications.
Memory trick: Coverage Counts: Total Area, Coats, then Divide.