Problem Solving Forum
July 24 - July 28, 2017
How many times can a building be repainted before the paint becomes too thick to perform properly?
Zenith Czora of Durotech Industries, Inc. on
July 30, 2017:
It is dependent on the integrity of the existing c ...read more It is dependent on the integrity of the existing coatings and not compromising the permeability or breathability of the existing coatings. Adhesion and permeance of the coatings should be checked first. The thicker the film, the more it retards or prevents moisture from escaping. The new paint to be applied should have at least have the same permeability rating or even slightly higher to allow moisture to escape but does not allow bulk water to penetrate in. The existing coating should be able to provide a good inter-coat adhesion to the new coating being applied. Test patch is always recommended.
Paul Gardner of Paul N. Gardner Company, Inc. on
July 28, 2017:
Repaint 5 times. ...read more Repaint 5 times.
Richard Fost of ArchiTech Consulting Inc. on
July 28, 2017:
I will say 14 times. When working for a school di ...read more I will say 14 times. When working for a school district in Chicago, we engaged KTA-Tator to analyze wall samples from an 80-year-old school auditorium in effort to determine why the new coating was failing in multiple locations. Final report from KTA showed the auditorium had been painted 14 times previously. The overall "assembly" was about 74 mils thick prior to new coating.
john lienert of nehalem bay paint on
July 27, 2017:
5 repaints ...read more 5 repaints