Problem: Cracked or broken cement mortar bedding to the ridge and hip capping. Solution: The capping should be rebedded or repointed. Problem: Cracked or broken roof tiles (sometimes it’s just one tile). Solution: The individual roof tiles should be replaced.  Problem: Roof tiles displaced  Solution: The displaced tiles should be put back into their proper position.  Problem: Blocked drainage channels under the ‘sidelaps’ of individual tiles. Solution: Any build-up of dirt or debris should be removed.  Problem: Flashings blocked, damaged or displaced. Solution: These problems should be corrected. Problem: Blocked gutters (including valley gutters) and downpipes.  Solution: These should be cleaned out.  CAUTION: If your roof needs checking or if you have a roof leak, it is best to employ an expert to undertake the work for you. Walking around on a roof can be dangerous. (1) Roofing Association, Roof Restoration Consumer Guide 2009