Soft green growth on roofs indicates moss, which is a rapid-growing, flowerless plant. Roofs with poor drainage are likely to harbor moss, since moss flourishes in moist environments. Abundant shade and vegetation are also responsible for moss growth on shingles. Moss, no matter how cottage-like it appears, is actually harmful to roofs. Failure to control moss on roofs allows it to eventually penetrate and destroy shingles. Moss buildup also inhibits essential water drainage on roofs, which leads to leaks. Remove moss from your roof as soon as possible by calling a profession roof cleaning company.

Moss on roof is a common problem and usually effects roof tiles that are more porous such as those made from granular concrete rather than slate. It is often worse on north facing roofs because these tend to stay wetter for longer. Pitch of the roof is also a contributory factor as lower gradient pitches may not dispel rain water as quickly as a steep pitch roof. If moss dislodges in heavy weather conditions then it can also play havoc with the guttering and downpipes causes blockages and overflows.

Manual Removal : For severe moss issues then it is wise to call in a professional who can gain access to the roof to remove moss manually using a short hard bristle brush. Moss has a very short root system and is easily dislodged from between the roof tiles whether it usually found to get a grip first. A pressure washer is not recommended.

Herbicide Treatment : Once the severe moss clumps have been removed then the moss can usually be kept at bay using a herbicide. Moss is quite a slow growing plant so treatment once a year will usually suffice. The problem is usually how to get good coverage on the roof.

The best time of year to do roof moss removal in Portland is genuinely the summer. The summer usually means that our roofs aren't damp as dampness can cause slips and falls and tiles to become more prone to looseness. Summer offers the best weather conditions in which we can perform our preferred roof moss removal techniques, as the other seasons of the year don't offer the safety that summer does, wet and damp roofs are very dangerous and only using professionals and roof experts in those conditions is recommended if you have an emergency. Overall you must take your roof moss removal seriously, if you think it will be ok in the winter to attempt to remove it, you may have an accident or be at high risk from getting one, instead of putting yourself in these dangers, wait until summer to remove your moss.