About Us

Tim Zickuhr

Owner/Operator

We guarantee that each customer will receive service with the highest degree of quality and professionalism.

Our Mission:
It doesn’t matter whether you are commercial, industrial or residential, our mission is to provide you with a level of service that not only meets but exceeds your expectations.

Service Area:
Contra Costa County
Alameda County
Santa Clara County

Competitive Pricing:
R12 provides competitive pricing, referral, rewards, and commercial billing.

Accepted Payment Methods:
Check, Zelle, Venmo, Pay Pal & invoice billing

Our Story

R12 Window Cleaning was established in 2012
My wife and I have a real desire to bring customers satisfaction back to the level it should be. We are not in this for any other reason then to be known as the go to guys. Our goal is keeping customers happy and willing to refer us to friends and family.

What We Do

Window Cleaning

At R12 Window Cleaning, we specialize in cleaning windows on everything from residential homes to large commercial buildings. We clean both inside and out, tracks and screens for excellent results. We also handle problem windows that require scraping to remove paint, stucco, hard water, and other tough build up. It is our commitment to use only the best quality cleaning products and cleaning techniques so that is why we have chosen to use squeegees and other specialized tools, including de ionized water ( a form of purified water ) as part of our cleaning tool-kit. With R12 you can be assured a streak free shine without any residue that can be left behind from the traditional window cleaning method of paper towels or spray chemicals. Call R12 Window Cleaning at 408.372.7712 for a free estimate (If your windows require extra attention please let us know during your free estimate.)

Gutter Cleaning

R12 Complete Gutter Cleaning Service starts with blowing off roof debris to help prevent further debris build up in your gutters. We then continue and remove all of the debris currently in your gutter system using specialized hand tools. Once the debris are removed from the gutter system, we finalize our cleaning by flushing the gutters with water to remove any remaining sediment and to verify that the gutters and down spouts are flowing at 100% efficiency. Any areas that are not flowing correctly will be inspected and we will remove any missed/hidden debris or build up. R12 guarantees customer satisfaction or we will come back and clean your gutters again.

Bird Abatement

R12 provides bird abatement.
To schedule an appointment call Tim at 408.372.7712

Outdoor Lighting Service

The newest craze is Smart Lighting for programmable automated lighting. R12 Outdoor Lighting Service will provide you with a head start on your home lighting project by doing the hard work of hanging them up for you in the desired locations.

Pressure Washing

R12 Pressure Washing Service offers deep cleaning of your designated surface (cement, driveways, decks, docks, and sidewalks) to remove all sorts of grime build-up or to strip down a surface. From a mild low pressure cleaning for exterior walls to a high pressure surface stripping to prep for a paint job, R12 has the right nozzles, attachments, and detergents to get the job done right using our interior and exterior pressure-washing equipment. Call R12 at 408.372.7712 to schedule an appointment today. We guarantee our work.

Solar Panel Cleaning

R12 Solar Panel Cleaning Service for your home or business utilizes a deionized water and brush system that gets your solar panel glass surface crystal clear. With delicate care we remove all of the hard water, bird droppings, pollen, dust, sap, mold, and other grime and debris. It is this build up that prevents or reduces light from penetrating through the glass to the solar cells, thus reducing energy capture and system efficiency. However, after an R12 Solar Panel Cleaning, energy efficiency can improve from 6 to 15 percent. R12 guarantees customer satisfaction or we will come back and redo our work.

Top rated

R12 Window Cleaning5.0

Based on 108 reviews

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David Nickerson

22 hours ago

What an outstanding experience I had with Tim. Great communication. On time to job. Pressure washed my gutters and downspouts and area was clean like they were never there.

Response from the owner:Thank you David for taking the time to write a review. I really appreciate your feedback and description of the services provided. But most of all. Im so happy to have met your expectations. Tim Zickuhr Owner of R12

Susan Young

1 day ago

Great job pressure washing our roof & cleaning rain gutters for the third year. Good communication; prompt arrival; respectful of our property. Highly recommend!

Response from the owner:Thank you Susan for taking the time to write a review. And for mentioning the specific services provided. It has been a pleasure meeting your expectations. Tim Zickuhr Owner of R12

Mike Fossan

6 days ago

Very pleased with the cleaning of our gutters. On time. Professional

Response from the owner:Thank you Mike for taking the time to write a review. Im really happy to have meet your expectations.

Jason Martin

3 weeks ago

Response from the owner:Thank you Jason for taking the time to write a review. Your feedback is vital. And meeting your expectations are my goal. Tim Zickuhr

aleksandr korenblyum

3 weeks ago

Been working with Tim and his crew second year in the row, great prices and customer services. I highly recommend them.

Response from the owner:Thank you Alex for taking the time to write a review. It has been a pleasure providing gutter cleaning to you. Looking forward to many more. Tim Zickuhr

Wen-Liang Hsu

1 month ago

Due to the height of our house, not many vendors are comfortable working on the roof top. That’s how we started our relationship with R12. Tim has provided us gutters and windows cleaning services a few years now. He is very courteous, a trustworthy professional, always provides quality job. His charges are also very reasonable. If you ever need similar type of service, I would highly recommend you to contact R12, you would not be disappointed.

Response from the owner:Thank you Wen for taking the time to write a review and discuss the services provided. Im so glad to have met your expectations. And look forward to continuing to do so. Tim Zickuhr

Tom Anderson

1 month ago

I've lived in the house for 8 years and the gutters have never been cleaned. After Tim cleaned them out I'm looking forward to a winter without the gutters overflowing from too much gunk. He also cleaned the transom windows and they look great! Thanks Tim!

Response from the owner:Thank you Tom for taking the time to write a review. Andvto mention what services I provided. And remember you get a 1 year guarantee on the gutter cleaning. So if by some chance something does not perform up to standard. I will come back out at no expense to you. I really appreciate you choosing R12. Tim Zickuhr

Tricia Hinkle

1 month ago

Tim did a fantastic job for my mother’s home today! He is always professional and takes time to chat / visit with her - very thoughtful man !

Response from the owner:Thank you Tricia for taking the time to write a review. I appreciate the opportunity to clean windows for your amazing Mother. Roll Tide. Tim Zickuhr

Kristie Turner

2 months ago

This was my first time working with Tim and I had a great experience. Tim will be my go to from now on!!!!

Response from the owner:Thank you Kristie for taking the time to write a review. Im so glad I was able to meet your expectations. Looking forward to working with you again. Tim Zickuhr

Sandy Hagerty

2 months ago

Tim always does a fantastic job cleaning our windows! Thorough, on time, courteous!

Response from the owner:Thank you Sandy for taking the time to write a review. It has been my pleasure providing you services over the years. Tim Zickuhr

Judy Sigward

2 months ago

Just had my home soft washed and windows cleaned by Tim. My house looks freshly painted and he removed a large hornet’s nest from the roof trim. So grateful for his meticulous work and how efficient he is at fulfilling his mission. Exceeding his customers expectations. I highly recommend him and his service. See you next year my friend!

Response from the owner:Thank you Judy for taking the time to write a review. And also for your review being so detailed. I really appreciate you. Tim Zickuhr

Ritu Favre

2 months ago

Tim does great work! He has cleaned my windows and gutters for years. He is meticulous and responsible. So happy with all the work Tim did for me.

Response from the owner:Thank you Ritu for taking the time to write a review. I really appreciate you choosing R12 for all the years. Reaching your expectations motivates me. Tim Zickuhr

Mo Dawud

2 months ago

Tim is the “Go to person” for window , gutter and solar panel cleaning. He always does a great job. Thank you Tim for yesterday’s job. Mo

Response from the owner:Thank you Mo for taking the time to write a review. I really appreciate you mentioning the services I have provided. Im glad to be able to meet your expectations. Tim Zickuhr

Robert Buchanan

3 months ago

Tim did a great job washing our windows, inside and out. We had used him three years before and he did a good job then. Very happy with his work. We will use him again. Price was fair.

Response from the owner:Thank you Robert for taking the time to write a review. I really appreciate your repeat business and look forward to the future endeavors Tim Zickuhr

Carla Martin

3 months ago

Tim did a great job on our windows. They are so clean! I would highly recommend him for the job. We are probably going to do other services he provides.

Response from the owner:Thank you Carla for taking the time to write a review. Im so glad to have meet your expectations. And im looking for to providing additional services Tim Zickuhr

Angie Jorgenson

3 months ago

We had R:12 recommended to us by friends & are very thankful they did. We had Tim & his crew clean all windows & gutters around the house and we are very pleased with the results! Tim is very responsive, communicates well to set expectations and showed up when promised. We would highly recommend them!

Response from the owner:Thank you Angie for taking the time to write a detailed review. I really appreciate you mentioning the services we provided. And most of all im so happy we met your expectations. Tim Zickuhr

G Neri

3 months ago

We would highly recommend R:12. They did a very thorough job of cleaning and installing the pigeon net/guard around our solar panels. They were on time and delivered exceptional work.

Response from the owner:Thank you so much for choosing R12 and taking the time to write a review. Im so happy we met your expectations. Tim Zickuhr

Jean Reinhart

3 months ago

I had Tim clean my windows and gutters and also install pigeon proofing on my solar array. He was prompt and very professional, and the work was well done.

Response from the owner:Thank you Jean for taking the time to write a review. And mentioning what services were provided. Im so happy to have meet your expectations. Tim Zickuhr

Gina Gloski

3 months ago

Tim does a wonderful job cleaning windows. Very professional and thorough.

Response from the owner:Thank you Gina for taking the time to write a review. I really appreciate the feedback and the opportunity to provide you service. Tim Zickuhr

Alecia Figieroa

3 months ago

We had a wonderful experience with R12 Window Cleaning. The team was professional, prompt, and incredibly respectful of our home while working. They made sure everything looked spotless and ensured we were completely satisfied with the service before finishing up. Highly recommend them for anyone looking for reliable, high-quality service

Response from the owner:Thank you Alecia for taking the time to write a review. Your feedback is vital to me and the crew. Im so glad we were able to meet your expectations

Amanda Brady

3 months ago

Had Tim out to do our windows and could not be happier. They look AMAZING!

Response from the owner:Thank you Amanda for taking the time to write a review.

Vicki McCoy

3 months ago

Tim did a great job on our windows. He was professional and it was easy to schedule an appointment. Communication is great. I received a reminder the evening before and he kept me up to date on his exact arrival the day of the appointment.

Response from the owner:Thank you Vicki for taking the time to write a review. I to appreciate your communication. Its always good for me when clients a responsive. I really appreciate you choosing R12

Shikha Chauhan

3 months ago

Tim did an amazing job for us.

Response from the owner:Thank you Shikha for taking the time to write a review. Im so glad I was able to meet your expectations.

Mike Roza

3 months ago

⭐⭐⭐⭐⭐ Absolute perfection! Don't look anywhere else. Tim "the solar guy" and his partner Brandon did an unbelievable job at my home. They cleaned my entire roof and gutters, deep-cleaned my solar panels, and installed bird abatement mesh around the panels with absolute precision. Their workmanship is top-notch, and they are true class acts—local guys right here in Brentwood who take immense pride in their work. If you need solar panel cleaning, maintenance, bird abatement, or gutter services, this is the team to call. Highly professional, thorough, and efficient. Five stars all around!⭐️⭐️⭐️⭐️⭐️

Response from the owner:Thank you Mike for taking the time to write a review. Your details will certainly help others in making a choice for there service needs. Im also glad we were able to meet your expectations. Tim Zickuhr

Johnny J

4 months ago

Tim was kind, polite, professional, and went out of his way to look after my home. I am very thankful that I called him and will be using him in the future for his services.

Testimonials / Comments

” 100% Recommend this company!
Gutter, window cleaning, Christmas lights, you name it! “
Laura Nurisso von Savoye.

” Great job Tim, y’all are pros! “
Robert Hosey.

” Awesome job!!!
You did an amazing job on our home. “
Deanna Otero.

” R12 works above and beyond!
Family-owned business and provided the best service.
R12 not only takes care of their customers but is also involved in their community. “
…Brentwood Community.

Contact R12 Window Cleaning

Phone

(408) 372-7712

Address in Brentwood

R12 Window Cleaning in Brentwood
720 Crocket Drive
Brentwood, CA 94513

Email

tim@r12windowcleaning.com