Residential Services

Roof Washing

A clean roof not only adds to curb appeal but will last longer as a more efficient component to your home. In Wisconsin’s humid climate, algae, mold, and more can grow on your roof causing damage, like shingle rot. Cleaning your roof as regular maintenance can help it last longer against the elements, as well as save your wallet by avoiding premature repair and replacement. Roof washing is actually one of the lowest costing maintenance tasks with a large return on investment when it comes to curb appeal and sale-ability.

In Wisconsin especially, our climate creates the perfect place for particular algae to grow. Drive through any neighborhood around town and you’ll probably see a house or two with black stains on the roof. That isn’t molded, it’s algae called Gloecapsa Magma.

Spread through airborne spores, this algae can quickly accumulate on your home's asphalt shingles. Besides being an eyesore, this algae is actually living off your roof, and limestone fillers commonly used in shingles. If left alone, it can take years off the lifespan of a roof. This means you could be replacing your roof much sooner than you should need to, which can cost THOUSANDS of dollars. However, maintaining your roof with DeMark’s low-pressure method can keep your shingles clean and happy.

Cedar Shake Roof Maintenance

Cedar or redwood shakes roofs have been around for centuries and are one of the original roofing materials. Cedar/redwood shakes will not decay on their own! Decay is caused by moisture and some form of infestation (moss, mildew, lichen, mold, or fungi). The only way to achieve the full life-span of your cedar shakes is to maintain it with regular cleaning.

If there is no regular roof maintenance or cleaning, over time the shakes lose their integrity, which can lead to interior water damage and premature roof replacement.

Many cedar/redwood shakes roof homeowners weren’t told they needed to regularly maintain their roof to reach the natural life span of 40 to 60 years. Typically, cedar shake roofs should be cleaned every 10 years of the green moss, mold, lichen, or the dark brown to the black coloration of fungi that accumulates to maximize the roof’s life span.

In addition to cleaning, DeMark's makes sure there is no debris left in the valleys, and no over-hanging trees over the roof as this will cause moisture and shade.

DeMark’s uses Wood Wash, a soft washing additive for use on wood surfaces like wood shakes (roofing or siding). Wood Wash is specially formulated to foam and bring out the natural color of the wood surface during cleaning. Wood Wash is meant to be used in conjunction with bleach and water to make a soft washing solution that can be applied to wood surfaces.

Wood Wash can be applied at various strengths – stronger for deep cleaning of wood and lighter dilution ratios for cleaning lightly soiled wood surfaces that contain organic growth. Wood Wash, bleach, and water amounts are adjusted to achieve the optimal cleaning result.

Wood Restore Conditioner for your roof is a highly recommended second step.

Restore is a four-fold leave-on conditioner for wood shake roofing and siding that neutralizes the effects from the cleaning process, it moisturizes and conditions the surface, and it contains a UV inhibitor with an antimicrobial element to protect from future damaging elements. Restore can be applied to the cleaned surface while the surface is still moderately wet.

The DeMark's Difference

1. We use a low-pressure method that will not damage your asphalt shingles or void your roof's warranty.

2. We use only environmentally safe and EPA compliant cleaning agents (OSHA and environmental compliance).

3. We have developed a proven custom 100% biodegradable proprietary solution that includes special detergents to kill organic growth at the root.

4. We take every reasonable precaution to prevent damage to plants, shrubs, grass, and trees in surrounding areas. We will thoroughly wet all plants, including grass, shrubs, and trees. Remember the algae, mold, or lichen growing on your roof is a plant and must be killed at the root, or it can grow back in no time.

5. We post-treat your home, plants, shrubs, grass, and trees with a high-quality bleach-neutralizer and surfactant. Ideal for rinsing bleach-washed surfaces to prevent damage to sensitive siding and plants.

Interested in having your commercial roof cleaned by DeMark's? Fill out the request form below or call 262-894-2057.

Cities we serve:

    • Brookfield
    • Delafield
    • Germantown
    • Hartford
    • Menomonee Falls
    • Mequon
    • Muskego
    • Nashotah
    • New Berlin
    • Oconomowoc
    • Pewaukee
    • Waukesha
    • Wauwatosa

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