Hello, I am new to this site. Can anyone advise me regarding outside rendering? We had our outside walls rendered and once dry we painted, two years down the line, the paint bubbled and blew and the rendering underneath falls off like sand when you rub it. Does anyone know a solution to this problem. We live in Spain and as most people probably know, they have never used dampcourses so any help would be welcome to resolve our problem. Many thanks. 
