Is Moss Bad For My Roof?

An abundance of rainfall and year-round moisture is one of the many benefits of living in the Northwest. The downfall is that pervasive moisture can lead to the growth of things like mold, mildew and moss on and in the infrastructure of your home.

All three are detrimental to your home’s structural health and moss, which loves to grow in the shingles of rooftops, is one of the most damaging.

Moss Growth on the Roof Causes Irreversible Structural Damage

Moss is a type of plant, called a simple plant, that doesn’t grow any flowers. Typically, you see moss growing in moist, natural environments, like along streambeds, in fallen logs, rotting sections of trees or even in rocks that have enough decomposed matter to create an anchor for the moss’s root beds. It’s a beautiful plant and it adds a forest-esque charm to all it blankets. However, don’t be fooled by its charm if you notice it on your roof.

Is Moss Bad For My Roof?
Is Moss Bad For My Roof?

Moss likes areas that are damp and shaded. It absorbs the moisture from the environment like a sponge, and decomposes the organic substance it’s chosen as its home in order to suck up nutrients. If you notice moss growing on your roof, you are watching your roof’s decomposition in action. Once the organic roofing materials have been infiltrated, the decomposition of their structure will make your roof less waterproof and more vulnerable to further moisture and other environmental damage.

If left long enough, your home will begin wicking this moisture in, allowing mold and mildew spores to take up residence there as well. The combination of moss, mold and mildew is devastating to wood and drywall structures. It can lead to thousands of dollars of damage – if not an entire roof replacement – as well as the repair of any attic, wall or interior crawl or wall spaces that may have been compromised as well.

Moss-Covered Roofs are Dangerous

Moss-covered roofs are also dangerous. First, they are dangerous for anyone who is working up on the roof because the moisture, moss and potential mold and mildew make a roof’s surface more slippery than it already is. If the damage has been left too long, sections of roof can cave in, posing further danger to the building’s occupants or the possessions you have stored inside.

Treat Moss Roof Problems ASAP

If you notice moss growing on your roof, it’s important to act sooner, rather than later. Like any new plant that is establishing itself in a new environment, moss is easiest to remove when it is just getting started than it is when it has taken up residence for a year or two. And, of course, the longer it has been there, the more damage it may have caused.

While moss can be removed by DIYers using a garden hose and hand-scraping, the job is best left to the professionals. Many homeowners try to use a pressure washer on their own, which can do further damage to the roof and the home’s structure. Pressure washing a roof should only be done by professionals who know exactly what they are doing.

Plus, as mentioned above, established moss makes for a very slippery environment and a professional moss removal crew will have the proper protective clothing and fall-protection equipment to make sure the moss is removed safely.

Have you noticed moss growing on your roof? Do you have a moss colony that has been there for years? Contact Proman WC and schedule our crew to remove the moss safely and efficiently. Call 425-908-9121 or 510-478-4880