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Roof Moss Removal
To put it simply, moss is a type of plant. It grows in clumps in damp shaded areas. It does not spread by producing seeds but can develop a spore capsule at certain times. If you see it on your roof, expect it to spread and get larger. Trees do not create moss. Trees provide the shade that allows the moss to fester. Shaded areas of a roof retain more moisture than sunny areas. This is why most roofs have stains or moss predominantly on one side or another. Please do not let anyone talk you into using a pressure wash type method. Even if they tell you it’s low pressure. The bottom line is that if it’s hooked to a gas powered pressure washer it will certainly exceed the specs of what the roof can handle. Low pressure is considered what comes out of a garden spigot. The safest way to remove moss is to apply a treatment to kill the moss. Allow the moss to dry out and decompose. Rain will wash away the dead moss over time. The only way to remove moss instantly is to either scrub or pressure wash the shingle. If you are selling the home than you need to do what you feel is best for your situation.
Besides Looking Ugly, How Does Moss Effect My Roof?
There is not much recorded data on roof moss. Through our personal experience of cleaning thousands of roofs with moss, it does appear that the granules of the roof are slightly thinned out where the moss has been growing. Just like any other plant, moss will produce a vague root system into the shingle. It may be this act that created thinning areas under the moss. Look at this amateur video of the damage caused by roof moss and lichens. Try to notice how the granules have been compromised. The further along it progresses, the further involved the treatment becomes. Moss develops a root system into the shingle which is a major factor how moss deteriorates roofing shingles. The root systems of moss slowly shred away the roof over time. It’s a slow but sure process in deteriorating the roof. This is one of the reason most insurance companies will drop coverage if the moss is not removed. It takes a long time for moss to take hold. Rarely do we see a roof 6 years old or less that has moss. The average age of a roof that needs cleaning is 12-15 years old. Once we treat the moss and kill the root system we can guarantee, in writing, that the roof will remain moss free for a period of 5 years.
What is the Cost of Roof Moss Removal?
I will do my best here. Roof moss cleaning is not “power washing”. It is against manufacturers recommendations to use any type of aggressive high water pressure on any roof, especially an asphalt shingle roof. We look at the job in terms of gallons rather than in hours. By OSHA standards we need to have two men on the job for protection. The price is factored for 2 personnel, amount of product, and overall novelty of the job.
The minimum cost of a roof treatment is $299.00. The job is priced more by “gallons” rather than time. The average roof treatment is $499. Factors involved in pricing include size, shape, landscape and accessibility. If the roof is easily navigable, it allows us to access all areas quickly. Steeper roofs need to be treated from the gutter line. Moving a ladder every 5 feet and negotiating dormers will obviously take a bit more time.
What Are These Guys Up To? Companies Who Fraudulantly Sell Low Pressure Wash or Sell “Green” Earth Friendly Moss Treatment
Low pressure means house pressure or less. Low-pressure means no motorized equipment should be forcing powerful water through any type of device. Bottom Line!!! “Earth-Friendly” means it does not have the ability to kill any living organisms. If it can’t kill moss the problem is not solved. A product can certainly be biodegradable but not be Earth Friendly. These are all selling terms that helps the consumer feel good about their purchase.
Low-End roof cleaning companies will use a device that looks like a floor buffer. On the bottom of that machine are nozzles that connect to a pressure bar. The nozzles on this bar are angled so the forced water propels the bar to spin. There is high pressure water coming out of those nozzles. So what does this mean?
The best way to explain is to first ask if you, the reader, have ever cleaned out gutters. If you’ve ever stuck your hand in a gutter you may notice that, along with the leaves and debris, you will find roofing granules that are gathering in the gutter. These are the granules that released from rain and wind. So imagine what pressurized water will do to the roof. That’s right! It will dislodge large amounts of roofing granules.
Don’t be fooled by this machine. It is an impressive piece of advice that works amazing on concrete and brick pavers, but not for roofs.
Let this video show you what a surface cleaner looks like. A surface cleaner is designed for cement, not roofs. This gadget is hooked up to a pressure washer and is designed to blast the moss off the roof. This is not healthy for the roof and will also blast off much of the roofing aggregate. Any pressure on the roof should not exceed 100 pounds per square inch. To put that into perspective you can get roughly 60 psi from a house garden spigot.
Soft-Washing with the correctly calibrated detergents can achieve a near 100% kill ratio on the moss and algae that stains roofs. Only be eliminating as thoroughly as possible will determine the length of time the roof will stay clean. Most stains at some time may re-occur at. Nothing will keep the roof stain-free forever and there is no coating or after market products that are approved by the roof manufacturer. If you find a product you like, we will apply it for a fee but will not be responsible for any damage that may result.
How Long Will My Roof Stay Clean and Moss Free?
The most accurate time a particular roof cleaning should last is count the number of years it took to get to the point where its at today. For instance: If the roof was installed 10 years ago and this is the first cleaning, you should expect to stay clean for roughly 10 years after treatment. sleep well knowing that every roof treatment comes with our 5 Year Spot Free Warranty!
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Roof moss does not magically disappear after treatment. After the moss is treated it will turn white, then quickly turn beige or brown. The moss will die and begin to decompose. As it dries out the root system will detach on its own. Heavy rains will finish the job. It can take on average 90 days for the moss to wash away. There is no quicker alternative except to pressure wash the moss which can compromise the integrity of the roof. If moss is removed prematurely, roof granules will remove with the moss. It’s best to let the moss release on its own. In some extreme cases where the moss is too big we may have to return and manually rinse large dead moss clumps off the roof. The roof will come clean. It’s not a matter of “if'”, but “when”.
10,000 Roofs Cleaned
Our Soft-Washing System has cleaned over 10,000 roofs successfully in New Jersey for moss, lichens, algae, and black roofing stains. every full roof treatment receives our 5 Year Spot Free Warranty. If any organic staining, like moss, returns in this 5 year period we will treat it for free. No strings, no haggle, no nonsense!
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