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northeastern Ohio | We have many many old bank barns around the farm. We've had a airless sprayer for 30 years and a manlift for almost 25 years. I spent many days scraping the old wood siding, renailing boards and spraying on many different kinds of paint. None of them last forever and some didn't last but a few years. 30 years ago we used oil base paint with some Penetrol mixed in (I have no idea if it helped or not). Sometime ago we switched to latex.
I've tried the cheap stuff (BARN and fence paint) from TSC and I've used the Behr premium from Home Depot. The Behr has held up much better. Dad came home with some buckets of Valspar StormCoat tonight. Looks cheap to me and I'll probably regret putting it on.......
I'm sure that everyone would recommend putting on metal siding and never paint again. It's not in the budget this year, so lets save that discussion for another day.
I want the paint to stick!
My neighbor had his barn siding sandblasted and it has held up great. But the cost was great too!
I've seen "professional" guys pressure wash the old siding and then paint the next day. I've never tried that. How does latex paint stick to wet wood? Latex is water based, so does it help to have the moisture content of the wood higher or should it be drier? I know the old oil base paints liked dry wood better.
I know prep is the most important part. Need to get all loose paint off. Need to fix so that the water stays on the outside of the structure. But why does one paint stick better than another? What's the magic ingredient and how do I know if I'm getting the good stuff (is price the only way to tell?)?
Here's a picture of our home barn. Painted it about 12 years ago. This is the west side that takes the most abuse. We put two coats on the far section. Two coats definitely lasted longer. I'm pretty sure this was the cheap barn paint from TSC....
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 055 (Large).jpg (136KB - 196 downloads)
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Time to paint old bank barns again... need tips to make it last longer
