One huge factor for prospective homeowners when looking for a house, is the age and condition of the roof. There are a lot of things that affect the lifespan and health of your roof if not maintained properly. In this article we will discuss different types of roof fungus, what causes them to grow, and how to treat and prevent it in the future.


There are four common types of roof fungus that cause the most problems, whether it be damage to your home or your health.

roof fungusThe first one we will talk about is Algae. This fungus is particularly damaging to the roof itself when not taken care of as soon as it’s noticed. Algae will devour your shingles, and is also attracted to moisture. So when the spores land on moisture deposits on your roof, they will make a home for themselves there. Spreading across your roof, the ideal place for algae to spawn is somewhere damp and humid. Households in the deep south, northeast, Midwest and Pacific coast should look for the black-green hue on their roof.

The next roof fungus is something everyone will know. Moss. If properly maintained, this fuzzy green fungus can be a beautiful aesthetic piece for the outside of your home. However, like most fungus, moss is also attracted to moisture, which can be detrimental to your roof health. The more the moss spreads over your roof, the more it will add to your moisture problem on your roof. This can seep into the wood of shakes and shingles and lead to roof rot.

Mold is one of the most problematic fungi there is for a homeowner. Not only is it unsightly, it is extremely hazardous to the health of you and your family. It’s easy to notice because of its distinguished smell and the way it looks. It can be a slimy black, brown or even dark green color. Again, moisture deposits attract mold. The most common place for mold to grow is on wood and drywall, where water might seep in.

The last one we will discuss is Mildew, which like mold, is very dangerous if left to fester and grow. Unlike its fungi counterparts, mildew spreads extremely fast in warm and wet places. This includes roofs that don’t have proper drainage systems in place. You can spot this nasty fungus due to its wide color range; light grey, pink or black.

Common Factors 

After discussing these fungi, there is an underlying factor they all have in common: Moisture, dampness, humidity. Excess amounts of moisture on your roof can lead to any one of these fungi infestations. Remember, the two most dangerous fungi are Mold and Mildew. These can cause serious respiratory problems in your family if exposed to it for too long.

How do you treat Roof Fungus?

If the roof fungi haven’t damaged the structural integrity of the roof, you should be able to clean it yourself. You can do this easily with a 1:1 ratio of bleach and water. Bleach kills fungus on contact. Simply mix the bleach and water, spread the mix over your roof with a mop, and hose the roof off. This will be the perfect time to check on your gutters to make sure they are draining properly.

After cleaning off the roof, treat the roof with a moisture resistant solution to help keep moisture off. Next, try trimming branches that may be hanging over your roof. Over hanging branches may causing excess water buildup. Finally, make sure your attic and roof can vent heat and humidity properly with ridge vents.

So, if you notice water marks, peeling paint, peeled plaster or discoloration you might have a leak cause by unwanted fungus. Call us today, we would love to come take a look and help you get back to healthy, fungus-free living!

One of the least exciting things that can happen to a homeowner is roof rot. It might not sound like much of an issue, because “out of sight, out of mind” right? When this problem becomes evident by water spots on your ceiling or even plaster falling off, you know its past time to check in the attic for the cause. Here at Beneficial Roofing, we are experts at not only dealing with this problem, but also preventing it.

What causes Roof Rot?

There are a lot of things that can ultimately lead to roof rot, but the three main causes are:  humidity due to temperature changes in the attic, moisture from the condensation caused by the temperature, and ventilation problems. You may be asking yourself, “What exactly is roof rot?” Roof rot, or dry rot as it is commonly known, is what happens when there is too much moisture in your attic. Another cause could be a water leak somewhere in your roof, allowing water to seep into your attic.

Whatever the cause, our technicians can find it and help you move forward with fixing the problem and helping to ensure that it won’t happen again.

How do you deal with Roof Rot?

It is possible to “repair” dry rot, if the areas that are affected are not responsible for structural stability. If it is not a beam, joint or flooring, it might be worth looking into repairing instead of replacing. Before dealing with the damaged wood itself, make sure you find the cause of the problem. Whether it’s a leaking roof, poor ventilation, plumbing leaks or a damaged gutter, once it is fixed, you can focus on the wood.

Should you Repair or Replace Roof Rot?

The repairing process starts with removing as much of the damaged wood as possible. The best tool to use is a wood chisel. Injecting a consolidant into the wood will help reinforce the affected wood that you might not be able to reach with the chisel. This will help the wood fibers bond with the undamaged wood, making them strong again. To finish the repair, apply a wood patching product, a putty like material. Doing this yourself could be dangerous. Not removing all the affected wood could lead the rot to seep deeper into the rest of the wood. This will eventually causing the same problem.

The replacing process is a little different. You will need to remove all the rotted wood, including three feet of surrounding wood. Then remove the plaster, skirting paneling, linings and ceilings to make sure you got all the fungus. Next you must clean all the surfaces and steel pipes in a five-foot radius of the rotted parts. Next, you will need to apply a fungicide to all the surface area in that five-foot radius. Then you replace the wood you took out, preferably with one that has a preservative coating already on it. Lastly, you have to re-plaster and paint, typically with a zinc oxychloride product.

All of this is a very complicated, tiresome, and sometimes dangerous process that is best left to professionals, so you don’t have to stress and worry.

How can Roof Rot be prevented?

The best way to make sure that your roof is rot-free is to have regular inspections done. Having a professional come to check your attic will insure that if there are any signs of moisture, leaks or excess humidity, you will be able to take measures to rectify these problems. Another thing to do is to make sure that you have a proper roof ventilation system. Without a ventilation system in place, the moisture from the humidity has nowhere to go, thus sinking into the wood and causing this problem. You should also keep track on how your shingles are holding up. Make sure that there is no debris on your roof preventing water from running off the roof.

Don’t let the troubles of a rotted roof weigh down you and your family, give us a call! We are more than happy to help make sure that roof rot won’t bother you again.