Wet Film Thickness (WFT)
The thickness of a coating measured immediately after application with a comb gauge, before any solvent or water has evaporated.
On an actual building
It is the only chance to correct thickness while the material is still workable. Knowing the solids content lets you calculate the wet film needed to achieve the specified dry film.
What we most often have to correct
That checking DFT afterwards is sufficient. By then a shortfall means recoating rather than adjusting.
Terms that come up alongside this one
Wet Film Thickness (WFT) — questions we get asked
What does wet film thickness (wft) mean in waterproofing?
The thickness of a coating measured immediately after application with a comb gauge, before any solvent or water has evaporated.
Why does wet film thickness (wft) matter on a real project?
It is the only chance to correct thickness while the material is still workable. Knowing the solids content lets you calculate the wet film needed to achieve the specified dry film.
What do people commonly get wrong about wet film thickness (wft)?
That checking DFT afterwards is sufficient. By then a shortfall means recoating rather than adjusting.
Have a building showing this?
If a term on this page describes something you are looking at, a site inspection will tell you how far it has gone and what it needs. It costs nothing.
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