The Architecture Puzzler
Created by Dave Guadagni
Solution to Last Week's Puzzler
Architecture Puzzler #274
You specified an elastomeric coating with a dry film thickness of 10 mils (0.25 millimeters). The contractor says that it was applied with a wet film thickness of 15 mils (0.38 millimeters) and that, therefore, the application will be okay. Is the contractor correct?
You better check the thickness for yourself. Typically the thickness shrinks by about half during drying and 15 mils (0.38 millimeters) wet is likely to be less than 8 mils (0.20 millimeters) dry and not up to specs.
Dave Guadagni, AIA, is an architect with Robertson/Sherwood/Architects
Quizzical Pursuit is Copyright 2006, Dave Guadagni.