Posted July 06, 2016 - 08:44 PM
My house was a spec house so the builder cheated out on some things. My porch railing and ballisters rotted out after about five years. I replaced them with pressure treated lumber. I bought my lumber, stickered it in my garage and let it air dry a good six months or more. I cut everything to size, sanded it, primed it(twice) with exterior grade Kilz, filled knot holes with bondo, sanded and primed again before two topcoats of exterior enamel. I paid a lot of attention to the ends to keep water from wicking up the grain. Then I pre drilled and screwed it all together. Then more bondo in the screw holes, primer and another layer of paint.
That was 8 years ago and it has shown no signs of rot or peeling. I suspect it's going to outlast me.
Pressure treated can be painted but must be dry and prepped. I would not paint a deck floor. I use stain on it.
sodisr and toomanytoys84 have said thanks