Learn How to Measure the Wet Film Thickness of IFTI's Fire Protective Coatings

Coatings are often used for thermal barriers over various substrates such as spray polyurethane foam, wood, I-joists, and gypsum. When applying a fireproof coating to any substrate, the thickness of the coating is extremely important and needs to be measured and recorded accurately. Wet ﬁlm thickness, or WFT, is the measured thickness of any liquid applied coating while it is still wet. A wet ﬁlm thickness gauge should be used by the applicator, as the coating is being applied, to ensure that the average applied thickness is representative of the tested wet ﬁlm thickness required to meet Code.

Why is WFT important? Measuring the Wet Film Thickness (WFT) of a coating enables the applicator to adjust the spray gun speed, a number of spray passes and to make spray gun adjustments to ensure sufficient coating is applied to meet the fire testing without over-applying, over-application can have a significant impact on your profits.

*Code compliance made easy- measuring WFT of our coating during the application process and recording it on a Job Work Record helps assure your Authority Having Jurisdiction (AHJ) that the correct film build has been applied and that they have documentation to support their inspection.