The surface needs to be cleaned periodically using a stress washer (as many as 150 bar ranking) to eliminate Filth, grime and moss. You should make sure that care is taken not to break the area with excessive stress. Only cold drinking water needs to be used plus the lance https://feriencampsfrkinderundjug99764.wssblogs.com/35021596/5-simple-techniques-for-resin-bound-installers-birmingham