Our barn roof is Onduline, a/k/a Onadine, an asphalt composition (organic fiber is embedded and the material is pressed so it is corrugated, looking like a corrugated steel roof). The coating is almost off and I want to get some more use from the roof. It is steep so it does not stay wet and seems to still have it’s integrity. I have been told to power spray it and then put on a high grade 100% acrylic. This will require the use of a lift, I suppose. Thanks.
Painting of Asphalt Composition Roof