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I have been in the business for 27 years and know from experience that on new work 3 total coats is better than 2 any day. It is the difference between a 3 to 4 year job and 6 to 7 year job. Now there will be paint on the house way longer than this but it will be so broken down as to cause problems down the road. Also people need to check over their houses every spring and fall for problems of cracked paint or loose caulk and take care of those little things then and the total paint job will last longer.
Have a great day.
Putting on two top coats effectively doubles the amount of mildewcide - and once it is gone provides twice the amount of paint to stand up to weather and the environment.
I have been in the business 18 years - making paint - selling paint - painting.
Any written warranty work I have ever done (where the paint company supplied the warranty) was done with two coats. No paint company I know will write a warranty on one.
In any case - it sounds here like we should agree to disagree on this one. We all give some good advice - and we all have our little things we know from experience or training - so - I am done posting on this one.....
See you all on another thread!
So now I am done with this.