Seattle-Bellevue Roof Cleaning Photos

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Most people seeking a roof cleaning,cedar roof restoration or deck restore do some research on a business before actually calling. Seattle is home to the most tech savvy consumers in the nation. Bellevue is home to many professionals who are accustomed to diligently checking references and using friends and family as their source for home improvement recommendations.

The saying goes that a picture is worth a thousand words so this post will focus on photos taken by 1 of our 3 crews to help serve as a reference to how we clean roofs, restore decks and bring back to life cedar roofing:

 

DECK RESTORATION BELLEVUE

BEFORE DECK CLEANING BELLEVUE,WA

This deck was covered in algae. It took 3 washes with oxygen bleach and an oxalic acid treatment to restore it.

Here the power of experience comes into play. The use of per-carbonate cleaner before a power-wash was the only way to effectively remove the deep stains. A light coat of sodium hypo helped kill moss.

The final step in a restoration is applying an oxalic acid treatment.

The restoration of this wood deck that had very little maintenance took  4 different chemicals and 6 hours. A dramatic difference from the photo above.

ROOF CLEANING SEATTLE

BEFORE-ROOF-CLEANING-SEATTLE

This roof had moss growth over its entire surface. We manually scrubbed and then applied moss killing and stain inhibiting chemicals.

Composition roofing is an inviting environment for moss growth in Seattle. Make sure to not destroy your roof while having it cleaned! We NEVER use power washing on asphalt/composition roofs.

After manual scrubbing, a moss and stain removing chemical mix was sprayed on this home in Seattle.

Using the soft wash roof cleaning method can clean a composition roof without destroying it. The difference in the pictures couldn’t be any more stark. All our roof cleanings come with a one year no moss warranty.

CEDAR ROOF RESTORATION BELLEVUE

Before and After Cleaning-Bellevue, WA

This roof in Bellevue, Washington was restored in a 5 step process. The roof was oiled to prevent cracking and warping during the cold winter months.

Cedar roofs are some of the trickiest projects to undertake for a roof cleaner. Safety and using the right chemicals are serious concerns. The roof above was suffering from severe weathering and the photo above was snapped mid way during the cleaning process.

Bellevue Cedar Roof Restore

After a thorough cleaning and acid wash this cedar roof was oiled to prolong the cleaning process.

Oiling a cedar roof deflects the harsh winter months we face in the pacific northwest. Choosing the right products and adhering to a maintenance schedule can lengthen the life of your cedar roof in Bellevue, Washington.

CONCLUSION

Trusting recommendations can go a long way in choosing the right contractor . We hope the photos above served as a reference to what we do. We have serviced over 200 clients in the last year and have many referrals upon request.

 

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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.

Moss on Roof

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What You Need to Know about Preventing Moss On Roof

Roofs that have a porous surface, such as wood and asphalt shingles, have a tendency to develop moss on roof. What can you do to prevent this happening to your roof? If you don’t want to replace the roof, you should clean the entire surface with gentle raking and then treat the roof with a chemical treatment  mixed correctly and done by a professional. This sort of care, performed regularly can work very well to remove moss on roof and prevent its return.

If your existing roof is of a material that can be painted, there are types of paint that have a metallic or mineral content that will help deal with the problem of moss on roof. Again, this is a solution that will have to be tended to regularly.

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Your roof has a tremendous amount of exposure and takes a beating from the elements day-in and day-out. Any maintenance measures or treatments used on your roof will need to be repeated at least annually and possibly two times a year, dependent on the shade and vegetation your home is surrounded by.

In the long run, the best thing to do to prevent moss on your roof is to start out with a roofing material that is moss resistant. Among moss resistant roofing materials are chemically treated shingles that are algae resistant and metal roofing, such as aluminum sheeting, galvanized steel and copper. In fact, metal roofing is so effective at preventing moss on roof, that the addition of metal strips to the peak of a non-metal roof will help kill off existing roof moss and prevent it from returning.

If you don’t like the idea of metal roofing, you can get specially treated roofing shingles of a variety of types that will help control moss problems. Shingles that are intended to deflect moss on roof are called AR Shingles. The acronym stands for “algae resistant”. This type of shingle material is treated with granules of copper or zinc to retard moss growth. When it comes time to replace your roof, be sure to look for materials with the AR designation to help keep the moss off your roof.

 

Cost to Clean a Cedar Roof in Seattle

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Cedar Roof Cleaning Cost in Seattle

The cost for a cedar roof cleaning in Seattle for a :  3000 square foot , 2 story, medium roof pitch home, averages between 800-1300 dollars. There are many expenses to cleaning a cedar roof:

  •  Labor
  • Gas for Power washer: 75-85 dollars worth for a 3000 square foot home.
  • Insurance costs
  • Chemicals [oxygen bleach and a revitalizer]

The cost for a cedar roof cleaning quickly adds up for the company performing the task. Cedar roof cleanings require meticulous attention to detail. Every square inch is cleaned for the product to turn out right. The job is very labor intensive and requires a set of skilled eyes and hands.

Cedar roofs are like ice when there is moisture and moss growing on them. A good tool to have is a pair of Korkers©. These shoes with spikes are essential to a cedar roof cleaner in Seattle. The spikes allow the wearer to grab a footing while cleaning the shakes. They do not replace other safety measures such as:

  • Lanyard
  •  Chicken ladders
  • Harness
  •  Rope

There is a lot to pressure washing a cedar roof and the right equipment and experience are necessary when deciding to tackle on the task. Many roof cleaners in Seattle won’t even touch a cedar roof as the liability for something going wrong is too high. Slips-Falls and improper use of a power washer can have serious consequences for the roof cleaner and the roofing substrate.

If you are considering hiring someone to clean your cedar roof always make sure the company’s licensed, bonded and insured. Make sure to ask for references. Cedar roof cleaning is a task that requires many years to master and some of the best roof cleaners won’t try their hands at it.

We provide cedar roof cleaning and oiling to the following cities:

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

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

Methods of Roof Moss Removal in Seattle

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Over 10,000 roofs are replaced per year due to water intrusion, in the Seattle area. Roof Moss is a major contributing factor to the number of roof replacements. Moss grows in patches 1-3 inches wide. Homes with infrequent sunlight or under foliage are the most prone to moss growth. Large patches of moss trapping moisture in 1-3 inch mats create water dams that then begin pushing water underneath roofing substrate. The roofing material is never left to dry out.The consequences are:

  • Rot.
  • Mildew
  • Buckling

What is Roof Mold?

Bryophytes are soft plants that grow in mats and clumps. They reproduce through periodic release of airborne spores. They have no vascular system to feed themselves as plants with roots do. Bryophytes therefore grow where moisture is prevalent. The Seattle region with between 72-88 days of sunshine a year is an inviting environment for moss growth. Our lack of sun is the reason moss grows so heavily in the area. With no ability to control our amount of sunshine, we are left to do periodic maintenance.

Differing Methods of Moss Control

You can speak to any 2 roof cleaners in the country and the proper method for roof cleaning and moss control is always up for debate. There are standard methods of moss control practiced around the country these methods are:

  • Power washing to remove moss.
  • The use of zinc strips.
  • Chemical treatment.

Power Washing 

Pressure washing without adequate chemical treatment afterwards is the least effective method in killing moss. Without the use of a moss inhibiting chemical you’re left with a roof that will need another cleaning almost immediately. There have been several studies done on the damage a power washer can do to asphalt granules.  ARMA [Asphalt Roofing Manufactures Association] recommends not using a pressure washer on asphalt shingles for roof moss removal. Their primary concern is the loss of granules. Although not as good on asphalt shingles, a power-washing is probably the only effective way of properly cleaning cedar and metal roofs.

The metal roofing vent prevents moss growth.

Zinc Strips

Zinc Strips are effective means of containing moss growth. Due to the cost and the amount of coverage required to kill moss, many times it is unfeasible to use this method. For Zinc strips to successfully control moss growth they must be placed every 3 feet from the tip of the roof to the gutter line. This method is very unsightly and many homeowners do not like the look of Zinc strips going down their entire roof line. The picture above shows CLEARLY, that zinc and metal DO stop moss from growing. Where the metal vents are present; no moss is growing directly beneath them.

To effectively use zinc strips:

  1. Two inches of zinc should protrude the asphalt shingle.
  2. They should start at the ridge cap and end 3 feet above the gutter.

Chemical Treatment of Moss

Chemical treatment, also called soft wash roof cleaning, in our opinion, is the most effective means of moss control. Using the right chemicals, completely kills all moss spores and prevents new moss from rebuilding. Most soft wash roof cleaner’s offer warranties of 1-5 years, they are secure in offering these warranties because they know that it took years for this moss to grow on your roof and it will take years for it to grow back, provided the right chemicals are used in strong enough doses.

The decision on what method is the right method for roof cleaning in Seattle is always up for debate. PWNG uses the chemical soft washing method to soundly control moss. We stand by our service and offer a 1-year warranty with every roof cleaning in Seattle. We look forward to any comments or questions our readers might have and we welcome an open discussion on roof cleaning.