It's the job that we all love to hate, and put off for months on end, potentially causing more damage than you might think. Despite controversy, moss and algae can be incredibly damaging to your roof both directly and indirectly. Moss thrives in damp or shady conditions, allowing areas of your roof to have an algae bloom which are renown for holding large patches of water, these pools of water overtime can cause gaps in between roof tiles when water freezes, causing much more damage. But that's just the start, structural issues can come into play especially if you hire in people to remove the moss, roofs are not designed to hold the weight of a person, and getting someone in to remove the moss can actually do more harm than it's worth. With so much speculation about whether moss is good or bad for your roof and the different ways it can be removed, we've put together some fail safe methods for removing moss from a roof effectively, and without causing any further damage.

How Do You Kill Moss?

  1. Moss thrives in shady and damp conditions, if you take these key things away from the moss it will stunt their growth and eventually die out. Understandably this is easier said than done as you can't change the position of your house, but you can check the internal structure of the roof to make sure there isn't any leaks or drafts that could be making it worse, and you can look at removing any external trees around the house to allow more sunlight onto your home.
  2. Turn the affected area on the roof into a highly acidic area, in order to work it needs to be above PH level 7. These types of products are extremely effective at killing moss from the roots, a number of standard household products can be used including white distilled vinegar, orange, lemon and tomato juice. These products should be applied directly to the area of moss, as the products are very acidic and you need to be careful it doesn't cause further damage by eroding certain types of surfaces. This can be avoided by diluting the mixture beforehand. When removing the moss, whatever you do, do NOT scrape the moss, and make sure that you rinse the solution off afterwards.
  3. Take away the moisture from the moss which again causes it to thrive and cause potential waterproofing issues further down the line. Like number 1, this can be an expensive and lengthy process, but if done correctly you should continue to live with a moss free roof for a longer period of time, this is not just a quick fix method. By allowing extra sunlight onto the roof and removing the shade this should firstly help to dry out existing moss and water should evaporate and drain away better when there is a heavy downpour. The method of moss removal and prevention like this can be highly effective, but if the weather is overcast, cloudy and rainy it can render it as ineffective.
Preventative Measures

Now that your roof should hopefully be free of moss, it's time to put some preventative measures in place to ensure it doesn't start growing on your roof again. Continue to keep the roof out of the shade by trimming trees, shrubs or removing trees completely. Look to install zinc or copper strips at the top of the roof ridges which make sure that any rainwater washes zinc down the roof, this is a fail safe method which kills anything that is growing on the roof. Lastly, ensure that you keep your roof clean of debris on a regular basis, you can do a quick check of the roof by putting a ladder up against the roof and having a scan.

Even if you are lucky enough to not have a roof plagued by moss, ensure that you put preventative measures in place so you never have to worry about the damaging, and unattractive effects of moss. Do you have any other tips for removing moss from a roof? Do let us know over on our Facebook page, Twitter and Google +.

Post By Nicole Sage