abrother Report post Posted February 3, 2016 Has anyone else seen clean spots on roofs prior to cleaning the roof then once the solution is applied and you turn to see your results only to find light brown residue?This is very common in the Chinese style concrete s tile.If you have this happen simply reapply explain to your customer that after it rains everything will look normal and clean 1 Apple Roof Cleaning (813) 655-8777 reacted to this Share this post Link to post Share on other sites
