Window Cleaning, Gutter Cleaning, Concrete Cleaning, House & Roof Washing

Top Rated, High-Class Exterior Cleaning Services

white house with black shudders and bushes before roof cleaning

Amazing job!!! My windows are sparkling!!! The young man who cleaned our windows was on time, professional, and very pleasant. He gave great attention to his work! I would highly recommend this firm. I would like to add: when I called Tasha got someone out to quote our needs immediately and we received that quote immediately… excellent staff from first call to job done!

Demarks profession using pink solution to clean side of white house

Make Your Home Look Amazing Again

Cleaning Your Home to Perfection With DeMark's Window Cleaning and Pressure Washing

At DeMark’s we pride ourselves on providing the best exterior cleaning service to you. We strive for five-star service with our pressure washing, roof washing, and gutter cleaning services for our residential and commercial clients. Our innovative and cutting-edge technologies and products have produced superior results for over 15 years.

DeMark’s fully insured team will bring your home or business back to life with our full complement of exterior cleaning services. DeMark’s is your #1 window and pressure cleaning service serving Madison, and the greater Milwaukee areas.

Our Services

Window Cleaning

Get a streak-free shine and enhanced view with sparkling clean windows!

House Washing

Expert house washing to remove black streaks, green algae and other dirt and debris from the outside of your home.

Roof Wash

Dirty roof? Expert house washing will remove black streaks and restore your roof to a like-new look.

Dirty Roof?

Get the Dirt Off Of Your Roof With DeMark's

Your roof will look new again with expert roof washing service.
In Wisconsin’s humid climate, algae, mold, and more can grow on your roof causing damage, like shingle rot. The eyesore of a dirty roof combined with the damaged shingles can become more expensive than it needs to be. It is important to clean your roof and our DeMark’s Window & Pressure Cleaning professionals are here to help with getting your roof clean and healthy again.
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. Once you make the decision to clean your roof, you are making the decision to maintain the beauty and structure of your home. Give us a call today to have your roof restored and protected with the best roof wash service in Milwaukee and Madison.
Roof Washing Cost

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 Our Clients Say About Us


With over 200+ 5 Star Google reviews.

Quality. Value. Peace of Mind.

Demarks cleaning professional cleaning windows on brown home
Professional Window Cleaning

Dirty Windows?

Make Your Windows Sparkle Again

Dirty windows can make your home look unappealing. Dust can take away the shine and your reflection will be one that is hard to find. Unclean windows can also block the view of what beauty lies outside of your home. Without them being properly cleaned, your windows will build up dust and dirt.

If you don’t have the time to thoroughly clean your windows, our DeMark’s Window & Pressure Cleaning professionals can clean them for you and bring the sparkle back. Our window cleaning process will bring you satisfaction and restore the streak-free shine that you might have forgotten exists.

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.


Professional. Affordable. Reliable.

Make Your Neighbor Jealous Because Your Home Looks So Good

Commercial Service Professionals

Keep Your Professional Image Maintained With Commercial Cleaning

Your employees and business partners will love the cleanliness of your building after a professional cleaning.

For over 15 years, DeMark’s Window & Pressure Cleaning has provided premier interior and exterior cleaning services for commercial businesses and properties. The cleanliness and beauty of the exterior of your building are the first impressions to employees and those who visit. Our commitment to superior service, innovative approaches, and techniques allow you peace of mind that your commercial building is well maintained.

Your business will beautifully stand out with a thorough and professional cleaning from DeMark’s Window & Pressure Cleaning. Once our professionals arrive, you will be able to go about your day, as our highly trained and skilled technicians are fully insured and trained on commercial safety standards working within the ANSI I‑14 Window Cleaners Safety Standards. Our high-rise building technicians are trained according to ANSI/OSHAIWCA I‑14.1 safety standards in rigging, fall protection, and rope access. So, if you are ready for your commercial property to be cleaned, contact us today.
Demarks cleaning professional cleaning windows on brown home

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.

FAQs for Window Cleaning & Pressure Washing

There are a few different recipes you can use to make a vinegar-based window washing solution that will help remove hard water stains.

1 part white vinegar to 1 part water: This is the most basic recipe and will work well for light cleaning.

1 part white vinegar to 2 parts water: Use this solution for moderate cleaning.

1 part white vinegar to 4 parts water: This is the strongest solution and should be used for tough stains or stubborn dirt.

To use, simply mix the ingredients together in a spray bottle and spritz onto your windows. Wipe clean with a lint-free cloth or a squeegee.

*Thanks to Professional Window Cleaning for this great information!

There are two ways to clean windows – with a squeegee or with pure water.

Professional window cleaners prefer to use a squeegee because it’s faster and the results are more consistent. However, if you don’t have a squeegee, using pure water is the next best thing.

Here are the steps for cleaning windows with a squeegee:

  1. Use a bucket of warm water and add some mild dish soap or window cleaner.
  2. Dip the squeegee into the soapy water and then wring it out well so that it’s not dripping wet.
  3. Hold the squeegee at an angle against one side of the window and push downwards towards the bottom of the window.  The angle will push water away from the middle of the glass towards the edges.
  4. Simply use a dry cloth to wipe the excess water from the edges of the window.

Here are the steps for cleaning windows with pure water:

  1. You will need pure water.  This is water that has 0 parts per million and will be able to rinse off the glass perfectly. (This is very similar to the spot-free car wash rinse)
  2. Using a window cleaning brush, scrub the glass to loosen all dirt and agitate the debris.
  3. Now use the pure water to carefully rinse off the glass
  4. That’s it, let  it air-dry, and it should be spot-free!
*This great information was provided to us from Windows Gutters Etc in Denver.



There is no definitive answer to this question since there are a variety of siding materials and power washing methods. However, in general it is recommended that you avoid power washing siding made of vinyl because the high water pressure can damage the material. If you must power wash your vinyl siding, be sure to use a low-pressure setting and avoid getting the water directly onto the siding.

For other types of siding, consult your local power washing professional to find out if it is safe to use a power washer and what settings to use.

Soft washing and power washing are two methods of cleaning exterior surfaces. Power washing uses high pressure water to blast away dirt, mold, and grime. Soft washing uses a lower pressure stream of water that is combined with detergent or soap.

Power washing is a more aggressive approach and can damage surfaces if not done properly. Soft washing is a more delicate approach that is less likely to cause surface damage. Both methods can be effective when done by a professional who knows how to use the correct equipment and techniques for each situation.

We appreciate our friends at Wash Masters Cleaning in Minneapolis, MN for helping answer this question!


A professional window washer will use a variety of commercial cleaning solutions, depending on the type of window and the level of dirt or grime. For example, an ammonia-based window cleaner can be used for general cleaning or for removing grease and oil, while a vinegar-based cleaner is effective for removing light built-up dirt and residue. In most cases, the pro will start by spraying the cleaner onto the window, then using a squeegee to remove the liquid and any dirt or grime. Finally, they’ll use a towel to polish and dry the windows.

Thanks to Frisco Window Cleaning Service for providing this information!


A dirty roof can cause a number of problems, including decreased insulation, increased energy usage, damage to the roofing materials and adversely effect the appearance of your property.

Dirt and dust on a roof can also lead to the growth of mold and algae, which can cause further damage to the roofing materials as well as posing a health risk to the occupants of the building. Finally, a dirty roof can be a breeding ground for insects and other pests.

Washing your roof regularly is an important way to prevent these problems from occurring. A good rule of thumb is to wash your roof every two years or so, depending on how often it rains in your area.

According to our friends at Superior Softwash Solutions, there are a few methods that can be used to clean a concrete driveway:

Pressure washing the driveway – this is the most common method, and it involves using a high-pressure stream of water to remove the dirt and debris from the surface of the driveway.  Caution should be used when using this method to ensure the correct amount of pressure is used so as not to damage the driveway’s surface. 

Chemical cleaning – this method uses a chemical solution to break down the dirt and debris on the surface of the driveway. It is less common than pressure washing, but it can be more effective at removing stubborn stains.

For best results, it’s recommended to hire a professional pressure washing company to clean your driveway. They will have the experience and expertise to safely clean your driveway using the right techniques and equipment.