Roof-slate-paint-ireland, slate roofs require proper care to prevent damage when cleaning or painting. moss and algae can grow in and under the joints of slates and pro wash will treat your roof to remove spores of moss and algae from otherwise inaccessible parts of the roof before painting.. Cookie preferences. this website requires cookies to provide all of its features. for more information on what data is contained in the cookies, please see our cookie accept cookies from this site, please click the allow button below., paint for restoring slates or roof tiles there is a paint available for painting on roof tiles and fibre cement slates. we do not stock or sell it ourselves but it is available from colortrend / general paints - their website is phone number 016288224