#1 Roof Washing Service

Roof Cleaning For A 'Like New' Look

white house with black shudders and bushes before roof cleaning

We used Demark's for a roof cleaning recently. We worked with Brandon who was great; professional, prompt, and sure-footed on my roof. Highly recommend their services based on the professionalism but also the affordable rate. Thanks, Brandon!

roof washing

Is Your Roof Dirty?

Restore Your Roof to Greatness

If the beauty and glory of your home are gone because of your dirty roof, it is time to clean it. A dirty roof can bring life to a standstill and create an unforgettable eyesore in your neighborhood. Our climate creates the perfect place for particular algae to grow. This is why our DeMark’s cleaning professionals are the best at what they do. With our special roof washing process, your roof will see the greatness it deserves. 

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.


What Our Clients Say About Us


With over 200+ 5 Star Google reviews.

Quality. Value. Peace of Mind.

Restore & Protect Your Roof

Why Do I Need A Professional Roof Wash?

A clean roof not only adds to curb appeal but will last longer as a more efficient component of your home.

Your roof is your protection from the outside elements that float through the air. Throughout the year, it takes a beating from the different seasons and weather. Over time if your roof is not properly taken care of, the life of your roof could build up mold, dirt, and other invasive contaminants. 

Why is pressure washing my roof important?

  • Saves You Money – 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 saleability.
  • Increase Your Roof Life – The shingles and foundation will be saved on your home with a roof cleaning. 

Satisfaction Guaranteed

We guarantee satisfaction with our hard work and professionalism.

Hassle-free customer service

Our customer service representatives are here for you.

Professional and Friendly Staff

We strive to be professional and friendly with the best service.

What Makes DeMark's Different?

You will receive experience and knowledge when you choose to have your exterior areas cleaned. We take pride in providing knowledge about our process with our work.

Professionalism and friendliness are what drives us to be the best. We work hard to show our customers we care about their home and their time.

We use advanced technology cleaning equipment and products for the best results when cleaning your exterior areas. 

Your home will be cleaned with the best cleaning products in the market and will shine with beauty after our professional cleaning process.

Soft Wash Roof Cleaning Cost
Roof Washing Services

What Are The Black Stains On My Roof?

Have black stains or streaks invaded your roof? Those often-overlooked black stains are algae-like bacteria, called gloeocapsa magma. Once these algae-like bacteria make a home on your roof, it is time to get it cleaned. These stains are not only an eyesore but can become a real problem, leading to aging shingles.

We understand your roof is one of the most critical parts of your home, which is a costly investment, and that’s the reason our team brings the advanced technique of low-pressure roof cleaning. Our roof washing professionals can remove the black stains on your roof and restore your roof back to being beautiful. If you want the black stains on your roof removed, give us a call today to schedule an appointment.


Professional. Affordable. Reliable.

Make Your Neighbor Jealous Because Your Home Looks So Good

No More Excuses

Let Go of the Objections

Your roof doesn’t need another objection to getting cleaned. 

If you have been making excuses as to why your roof is not cleaned, it is time to let them go. These excuses are becoming more of a problem and less of a solution. Roof cleaning is more important than you think and more affordable too! Those black streaks aren’t just an eyesore, they’re actually damaging your roof. 

Don’t wait and call DeMark’s today! You will no longer have to push off keeping your home maintained with excuses of doing it later. We will restore your roof with superior roof washing service.

Power Wash Roof Cost

Our Service Areas

Get Ready For Amazing Results

Waukesha County

Washington County

Ozaukee County

Milwaukee County


What's Next?



One quick call to our world-class customer service team will answer your questions and help you solve your problems.



With scheduling made easy, you’ll be able to pick a time that works for you. Your time is valuable. We get it!



Sit back and relax knowing that experts will be doing the work and you won't have to lift a finger.