Hi im a barn painter/sprayer i use a proper rubber coating which protects all metal sheeting and concrete from every day weather . All badly damaged sheets are replaced all holes and leaks are coverd with a special membrane then coated which prevents leaks. The coating is non voc which will not effect any live stock. All sheets will have two coats of rubber coating. If there is any overspray you dont have to worry about it going everywhere as it turns to dust by the the time it will touch the ground. All work carried out gets a 10 year guarantee. Iam from scotland but i do cover all over Britain If you are interested please get in touch
You can call me on 07402658556