The amount of material lost on any project will depend on the amount of spillage/waste, type of application (brush, roll, spray) and configuration of substrate being painted. Once these variables are known, use the following formula to make the calculation:
Practical Sq. Ft. Coverage
At Suggested DFT |
= |
1604 x % Volume Solids
Suggested Dry Film Thickness |
X |
(1 – Material Loss Estimate) |
Sq. Ft. Coverage
At Suggested DFT |
= |
1604 x .43
2 mils |
X |
(1 – 0.10) |
| |
= |
344.86 |
X |
0.90 |
| |
= |
310 sq. ft. at 2 mils DFT assuming 10%
of the material is lost during application. |
The amount of waste can vary widely with method of application and skill of applicator. The generally accepted waste factors are:
Conventional Spray
Airless Spray
Electrostatic
Roller
Brush |
25% to 30%
20% to 25%
10% to 15%
5% to 10%
3% to 5% |
