Algae Resistant Shingles: An effective way of moss and algae control.

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Many homeowners have had their roof fall victim to unsightly algae and moss . This is a common occurrence in areas that experience high levels of humidity. Aside from high humidity, algae can also be carried to your roof through airborne spores. Seattle is located in the national danger zone for roof moss and lichen. Fortunately, today’s homeowner has the option to choose algae resistant shingles, also known as AR shingles, to avoid this problem.


The History of Algae Resistant Shingles

Algae resistant shingles date back to the 1980’s when roofing materials were produced that contained alternative kinds of mineral granules, such as:

  • Zinc
  • Copper
  • Galvanized Metal Powder

When AR shingles were first produced in the 1980’s, they were considered to be a premium option in roofing materials. By the 1990’s, algae resistance became a standard option and was available in most brands of shingles.

How Do Algae Resistant Shingles Work?

AR shingles work by using copper that is included in the roofing granules that make up the shingles. The copper is not noticeable to the eye; however, it will keep algae from being able to survive on the surface of your roof. The copper or zinc materials found in AR roofing materials also respond to rain which activate the algae fighting action. Moisture generally works to help promote the growth of algae, but with these special shingles, it helps to further protect the roof.

AR shingles tend to be more expensive initially, but when considering the cost of having to have the algae removed from your roof on a yearly basis, they are well worth the initial investment and will help to protect your roof for many years to come.

How Effective Are Algae Resistant Shingles?

Some brands of algae resistant shingles can help keep your roof free from unwanted moss and algae for up to 20 years. Products containing copper have been reported to be ten times more effective than zinc at keeping algae at bay. The copper is generally time released and will work to resist algae and moss build-up over a long period of time.

It is also important to note that adding some type of copper ridge or hip shingle containing copper will not work on an existing roof system that already has live algae or moss present. It will not kill the algae, but rather works to provide resistance to it before it starts.

No one wants to think of fungus taking over their roof, causing damage as well as ugly staining. In choosing algae resistant products when replacing a roof, you may be spending more money upfront, but for the protection and peace of mind that comes with it, it’s worth it.

Soft Wash Roof Cleaning Seattle

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Chemical Roof Cleaning

Soft-washing involves the use of chemicals to clean roofs. This method is employed to lessen the amount of damage caused by power-washing. Power-washing on average removes 3-4 layers of granules per cleaning . A roof is known by its years of life:

  •  A 20 year roof has 20 layers of granules.
  •  A 50 year roof has 50 layers of granules.

The soft-wash method when used properly is far more beneficial to roofing substrate then power-washing. No granule loss happens when chemicals are sprayed on your  roofing. Additional benefits include:

  • The elimination of all moss spores that cause moss to grow in the first place.
  • A much longer lasting finished product; on average the process lasts 2-3 years

ARMA [Asphalt Roof Manufacturers Association] recommends soft-wash cleaning for proper roof maintenance. ARMA is the association that governs the making of asphalt shingle roofing. They are the leaders in the industry in the production and proper cleaning methods of roofing materials.

The difference in the finished look of the product : power-washing versus chemical cleaning is nearly indistinguishable, when the proper chemicals are used. A soft wash roof cleaning company generally use a few standard chemical products:

  • TSP [trisodium phosphate]. Known for its ability to remove algae and rust stains
  • Sodium Hydrochloride 10% or higher: known for its ability to kill moss and clean shingle.
  • Borax Lo: A soap like product known to aggressively kill weeds, spores and moss residual.
  • Isopropyl Alcohol: used when aggressive moss has been growing for long periods of time.
  • Surfactant:  used to slow the mixtures path down to the gutter line.

When mixed properly these chemicals generate a long lasting safe products to roofing material. These chemicals are not readily available to the average consumer and the mixtures of this chemical call for exact amounts for a strong enough product. The procedure of soft wash roof cleaning in Seattle is best left to a professional roof cleaning company.

 

Roof Moss Removal Seattle

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Removing Moss from Roofs

The moss on your roof has been introduced to your substrate by airborne spores that periodically pollinate their surroundings. In high winds these spores travel. Regardless of where it came from we are going to be discussing how it spreads, what damages it causes to roofing materials and the proper way to remove it.

How Moss Grows

Moss spreads thru its spores, it has no vascular system. It is of the plant family Bryophytes. Bryophytes absorb water through their leaves. It receives nutrients by absorbing it through photosynthesis. Since it has no vascular system it must find a damp place to live. Roofing makes a very great abode, as it is one of the dampest places on a home. Seattle has an average of 150-days of rain a year, making Seattle one of the rainiest places in America. The combination of location and environment make roof moss in Seattle, a normal occurrence.

Damage to Roofing

Moss grows in mats 1-3 inches tall. These mats act as a dam and do not allow water to flow freely down your roofing into your gutters. Water begins to pool at portions of your roof affected with moss growth. The shingles underneath aren’t allowed to naturally repel water or breathe.  In a very short amount of time, when left untreated, moss will completely destroy a roof.

Methods of Removal

There are several methods of removal that are practiced by roof cleaning contractors in Seattle:

  • Power washing
  • Manual Scrubbing with a  stiff bristle brush
  • Chemical Treatment

Chemicals to Kill Moss

No method is complete without the use of a biocide after the cleaning has been done. The preferred chemicals to kill moss are:

  • Zinc Powder
  • Copper Powder
  • Sodium Hypochlorite

Roof cleaning contractors in Seattle know that cleaning a roof, without administering of moss inhibiting chemicals is likely to cause moss to return very rapidly. When applying chemicals the manufacturer’s directions for proper application should be observed. Improper application or insufficient use of chemicals when mixing will cause damage to the roofing material or dilution to potency not suitable for killing moss.

Conclusion

Moss is a very destructive force to roofing materials. Proper application of moss killing chemicals can only be administered by an experienced roof cleaner in Seattle. There are several methods of roof cleaning but all must end with the application of moss killing chemicals.

We provide roof moss removal services to the following cities in Washington State:

Alderwood- Ames Lake- Arlington -Auburn- Ballard- Bellevue-Belltown-Bothell-Bridle Trails-Brier-Burien-Covington Crossroads -Des Moines-Edgewood-Edmonds-Everett-Evergreen-Fall City-Federal Way-Ferndale-Granite Falls-Hunts Point-Issaquah-Issaquah Highlands-Juanita-Kenmore-Kent-Kingsgate-Kirkland-La Conner-Lake City-Lake Forest Park-Lake Goodwin-Lake Stevens-Lynnwood Madison Park-Magnolia-Maltby-Maple Valley-Marysville-Medina-Mercer Island-Mill Creek-Monroe-Mountlake Terrace-Mukilteo Newcastle-North Bend-Overlake-Parkland-Puyallup-Rainier Valley-Redmond-Renton-Rose Hill-Sammamish-Sand Point-SeaTac Seattle-Sedro-Woolley-Shoreline-Smokey Point-Snohomish-Snoqualmie-Spanaway-Stanwood-Tacoma-Totem Lake-Tukwila -University Place-White Center-Woodinville-Yarrow Point

Roof Mold Removal Seattle

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Just what exactly is that on your roof? That green plant growing unchecked and unchallenged? The dictionary description for moss is as follows:

any tiny, leafy-stemmed, flowerless plant of the class Musci, reproducing by spores and growing in tufts, sods, or mats on moist ground, tree trunks, rocks, etc.
 
So what does this tell us about combating moss in Seattle? Kill the spores, kill the moss, in order for this flowerless plant to reproduce it must reproduce through spores.
As sad as it might sound there is only 1 way to kill moss. Using an herbicide that kills it and its spores . As members of the RCIA, we have developed a complete and time-tested way of eliminating moss in Seattle. Keep following us and learn those methods.