Safety During Roof Moss Removalĭepending on how you want to remove the moss, either with chemical agents or with a broom or pressure washer, the time of year may not matter. Either way, once the moss is dead, you’ll still need to remove it from the roof. Other products may need to be mixed and applied while on the roof. If you decide to use chemicals to kill the moss, some products come in containers that can be added to the end of a garden hose and sprayed from the ground level (if you have enough water pressure). Once the bigger clumps are removed, give your roof a wash with a combination of equal parts water and chlorine bleach to kill the remaining moss. The same with pressure washing–too much pressure will do just as much damage to your roof as the moss itself. Sweeping up could lift or otherwise damage shingles.ĭon’t be too aggressive because you could be brushing off the protective granules found in some roofing materials. When using a broom (if your roof isn’t too sloped), start at the top and remove the moss by sweeping down the roof.
Removing moss from your roof is a relatively simple process, just so long as you haven’t let it get out of control. If moss treatments are applied to the roof, they will be absorbed along with the rain. The reason for this is that the moss is absorbing as much water as it can. There is a school of thought that you should wait until the moss “growing season,” which is when the rains start falling in the Fall and continues through the Spring. This makes it easier to remove manually, with a broom or a very light pressure wash. Moss turns dormant during the drier weather and becomes more brittle. In some cases, the best time of year to remove moss from the roof is in the summer. To prevent moss damage, it’s a good idea to remove the moss as soon as it appears. By the time you realize there’s an issue, it’s probably too late to fix the problem before repairs are needed. The problem with this damage is it doesn’t happen overnight. This leads to leaks which can lead to problems with the structure of your roof, ceilings, and even the walls of your home. If there are any imperfections in the roofing material, that water can find its way underneath, to the underlayment, and then onto the decking. When moss starts growing on your roof, it can both eventually weaken asphalt or composite roof shingles and absorb water and hold it in place.
Moss growth is as dangerous to your roof as it is unsightly.
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