As a homeowner, you know the importance of keeping your roof healthy. If you live anywhere where the climate can be damp or humid, you may notice dots of green moss on your shingles. Before you panic and start throwing bleach or lemon juice all over, realize that while you should remove the moss, there's no need to fret.
Why is Moss Bad?
Moss in itself isn't bad, but the effects it can have are. As moss grows, it will spread to underneath the individual shingles on your roof. Growing there, it causes the shingles to lift. Additionally, because of the moss' structure, water will wick underneath your shingles and begin to soak into the underlayment.
Once the underlying felt is saturated, the water hits the wood underneath, leads to all sorts of problems. Rot, water leakage, and (in some climates) buckling caused by icing are all direct consequences. Therefore, it's best to get rid of the moss.
How To Get Rid of Moss
First, do not ever pressure wash your shingle roof for any reason. This is because the pressure will abrade your shingles, removing bits and reducing the lifespan of your roof. Additionally, if the pressure wash angles up under the shingles, it can cause them to lift and crease, which is what you are trying to avoid by removing the moss.
Instead, use a stiff brush to spot clean the moss as needed. If you have severe moss, you may want to try chemical treatment. Avoid sodium hydroxide as that can eat away at the roof shingles.
How Can You Keep Moss Gone
Once the moss is removed, either through mechanical or chemical means, keeping it gone should be your next priority. One of the easiest ways to do this is to install a strip of zinc along the cap of your roof. The cap is the line of shingles at the very top that protects the peak of your roof. The zinc forms a chemical solution when it rains and slowly dissolves and kills any moss spores or rooting plants. You can also use copper wiring, but zinc is generally less expensive.
While mossy roofs may seem to lend an idyllic and cozy air to your home, it can actually be causing damage that you can't see. This damage to the underlayment is expensive to repair and is wholly preventable. If you aren't comfortable doing the moss removal, consult your local roofing company (such as Freedom Roofing) for assistance.