Three Treatment Options

We offer three treatment options.

Protect Natural Cedar Oil clear treatment is for cedar shake roofs that have recently been cleaned. It goes on clear and has a three year no-moss warranty.

Protect Natural Cedar Oil with color stain added is actually a stain sprayed on your roof to give it color for cosmetic purposes only as seen in the picture to the left. It has a 3 year no-moss warranty.

image of bellevue home after
before color treatment
image of home with roof repair in bellevue
after color treatment
image of roof contractor cleaning a seattle home's roof
Atco Shake Color Treatment


Weathershield is a water-based roof treatment. It is evident in color and has no offensive odors. Weathershield is environmentally compatible. It is not flammable. It has some degree of retardancy. Weathershield can extend the remaining roof life by 30 to 50%.

One of our trained professionals will begin by gently removing debris from the roof using air or light water blowoff This can be done rain or shine. Next, we will make necessary repairs to the roof. Your bid includes a 1/2 bundle of shake or ridge cap replacement or a 1/2 hour of re-nailing loose shake or ridge caps.

Should any additional repairs be required, you will be informed with a written estimate of additional recommended repairs once the cleaning has been done.

Weathershield will only be applied on a dry day to attain maximum application and penetration. Efficient employees and custom-built equipment do this. Please note that roofs previously treated with colorants or stains will not turn to the gray colors shown.

Weathershield is carried into the shakes by water, and the water evaporates, leaving the safe chemicals behind. Weathershield then begins its process from liquid to crystals, activated by the rain, sun, and cold and warm weather and will kill the moss and lichens in time and turn the roof a light silvery grey.

This repeated process pushes out and breaks down the unsightly mosses and fungi on your roof, and with every rain action, it is gently rinsed away. Depending on the roof’s age, deterioration, pitch, and quality, the full cleaning effect is generally attained within 6 months and lasts for 5 years.

Weathershield not only cleans the shingles on your shake roof but also prevents the mosses from returning. This is achieved by changing the ph factor in the wood to an alkaline environment. Moss, fungi, and lichens only grow in an acidic environment which will keep your roof clean and free of moss and lichen for a 5-year period. The rest of the process is done by nature. The more rain, the quicker the results.

Weathershield comes with a 5-year no-moss warranty. This service is provided to the greater Seattle area, including Arlington, Renton, Kirkland, and Lynnwood.

Why Alpine Roof Care?

Established in 1992, Alpine Roof Care has been providing the greater Seattle area – including Mill Creek, Arlington, Edmonds & Renton – professional, punctual and affordable roof cleaning services. With the ability to service all aspects of roof maintenance including roof repair, roof sealing, reroofing, and roof cleaning there is no need to bounce around from company to company. Instead, get all your clean roof needs met here and keep your family warm and dry.

We are a forward-thinking company and are proud to be one of the first in the area to implement “green roofing”. Our “green roofing” program recycles 90% of its tear-off materials accumulated during a roofing repair or roof replacement service. Along with the use of environmentally safe products, we strive to give you the best possible reroof and roof replacement services while taking care of the environment.

We proudly serve the greater Seattle area including: