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Heavy growth and debris on the vessel

Cleaned bottom and running gear of same vessel

Before and After

Advanced, specialized tools. For an unparalleled cleaning.

The old manual way of using metal and plastic hand scrapers is laborious, imprecise, and damaging. Even the most experienced divers struggle with the grueling physicality — resulting in an uneven job.


That’s why we use specialized equipment like the Nemo electric brush.

 

It’s designed with a suction cup that attaches itself to the work surface: helping divers move freely, while gently removing even the most stubborn marine fouling with its powerful motor. All while protecting the hull’s paint job with its specially designed brush.

Our Process

Here’s what you can expect from every appointment

Deep hull cleaning. With exceptional customer service.

Experience a dependable, stress-free hull cleaning service.

 

With decades of diving expertise and a 99% client retention rate, see why more and more boaters in Marin County are choosing us to clean and maintain their boats.

Get a free quote and appointment within 24 hrs

99%

of clients become recurring customers and would happily give referrals

21+

marinas and harbors serviced

25+

years of professional diving experience on different vessels

100+

hull cleanings and zinc replacements done

Easy bookings. Consultations within 24 hrs.

An in-depth, comprehensive inspection.

Thorough cleanings in 1-3 hours.

Detailed summary report and recommendations.

About Cresalia Diving Service

Hi, I’m Peter Cresalia and I’m a professional diver with over a decade of experience servicing vessels of all sizes from sailboats to big commercial fishing boats.

 

Unlike hobbyist divers, I’m here to support you for the long haul and treat your boat like it's my own. I only use specialized tools that ensure a thorough hull cleaning while still protecting your bottom paint — optimizing for longevity and performance.

 

Being a Marin County native with six generations of family history tied to this region, I feel deeply connected to its community and take great pride in supporting its boaters.

 

Customers often think of me as their “eyes below the waterline”. I keep detailed notes on your hull and share any issues or maintenance needs as soon as I see them. If you need a consultation or quote, I’m easily reachable via a quick text, call, or email.

Why our customers choose us

It’s important to find a boat cleaner you can trust and feel comfortable asking questions to. A lot of our clients choose us because we provide the peace of mind that everything was done correctly and transparently. That’s why 99% of our clients would happily give a referral. Here’s a quick comparison of what to look out for:

Communication

ALTERNATIVES

  • Unresponsive texts, calls, and emails.

  • Rushed, unclear, brief answers. 

  • No updates on hull issues.

CRESALIA DIVING

  • Easy bookings within 24 hours.

  • No obligation consultations. 

  • In-depth educational answers.

Prices

ALTERNATIVES

  • Underestimate costs and overcharge the bill.

  • Cheap prices delivering inattentive cleaning — resulting in future costly repairs and replacements.

CRESALIA DIVING

  • Transparent quotes.

  • No surprise charges.

  • Great value for premium deep cleaning and attentive, tailored service.

Boat Bottom Cleaning

ALTERNATIVES

  • Unpunctual. Unclear communication.

  • Inexperienced diver, resulting in incomplete cleaning.

  • No inspection or refusing to give an end report resulting in costly preventative repairs.

CRESALIA DIVING

  • Clear, responsive communication.

  • 30+ years of diving experience and Marin County waters expertise.

  • Detailed cleaning and maintenance report.

Hull Cleaning Tools

ALTERNATIVES

  • Often metal brushes that scratch hull paint, especially around hard to reach places like outboard engines.

CRESALIA DIVING

  • Nemo, underwater hull cleaning tool designed to suction cup to the bottom of the hull and gently clean every inch while protecting bottom paint.

Outcomes

ALTERNATIVES

  • Repairs and do-overs.​

  • Loss of time looking for a new cleaner.

CRESALIA DIVING

  • Peace of mind. Get it right the first time.

  • 99% client retention rate.

Communication

ALTERNATIVES

  • Unresponsive texts, calls, and emails.

  • Rushed, unclear, brief answers. 

  • No updates on hull issues.

CRESALIA DIVING

  • Easy bookings within 24 hours.

  • No obligation consultations.

  • In-depth educational answers.

Prices

ALTERNATIVES

  • Underestimate costs and overcharge the bill.

  • Cheap prices delivering inattentive cleaning — resulting in future costly repairs and replacements.

CRESALIA DIVING

  • Transparent quotes.

  • No surprise charges.

  • Great value for premium deep cleaning and attentive, tailored service.

Why our customers choose us

It’s important to find a boat cleaner you can trust and feel comfortable asking questions to. A lot of our clients choose us because we provide the peace of mind that everything was done correctly and transparently. That’s why 99% of our clients would happily give a referral. Here’s a quick comparison of what to look out for:

Boat Bottom Cleaning

ALTERNATIVES

  • Unpunctual. Unclear communication.

  • Inexperienced diver, resulting in incomplete cleaning.

  • No inspection or refusing to give an end report resulting in costly preventative repairs.

CRESALIA DIVING

  • Clear, responsive communication.

  • 30+ years of diving experience and Marin County waters expertise.

  • Detailed cleaning and maintenance report.

Hull Cleaning Tools

ALTERNATIVES

  • Often metal brushes that scratch hull paint, especially around hard to reach places like outboard engines.

CRESALIA DIVING

  • Nemo, underwater hull cleaning tool designed to suction cup to the bottom of the hull and gently clean every inch while protecting bottom paint.

Outcomes

ALTERNATIVES

  • Repairs and do-overs.

  • Loss of time looking for a new cleaner.

CRESALIA DIVING

  • Peace of mind. Get it right the first time.

  • 99% client retention rate.

Services & Rates

Hull Cleaning

Starting at $120

Sailboats:
$5.25 per foot

Powerboats:
Up to 49ft: $5.25 Per Foot

  • Custom pricing for vessels larger than 50 feet

  • Rates are based on a two-month cleaning schedule

  • Additional charges may apply for heavy growth and debris removal

  • Vessels are measured in Length Over All

What to expect:

Premium tailored service

Bookings within 24 hrs.

In-depth inspection including: hull examination, paint condition, zinc anodes, propeller and running gear, thru-hull fittings, rudder shaft, and more.

Boat & yacht cleanings in 1-3 hours

Barnacle, marine growth, fouling removal

Detailed summary report and recommendations

Responsive, clear communication

Debriefing call

Peter is reliable, prompt and the nicest guy.
 

He replaced my zinc anodes in no time and coached me proper boat maintenance.

Holly F.
Crab Captain

I was really impressed with Peter’s services. 

 

It was so easy to book a cleaning and get everything done in a few hours.

Bel Marin Keys

Customer

Thank you, Peter.

 

 

 

I really value your work and your communication skills.

Sausalito

Customer

Thanks so much for your hard work. 


Professionals like you are definitely worth the project cost.

Tiburon

Customer

Marinas & Yacht Harbors We Service

If you don't see your harbor listed please reach out to us. We'd love to help.

North Marin

Bel Marin Keys Yacht Club
Loch Lomond Marina & Yacht Club
Marin Yacht Harbor & Yacht Club
San Rafael Yacht Club

South Marin

Clipper Yacht Harbor
Corinthian Yacht Club
Horseshoe Bay Harbor

Presidio Yacht Club
Marina Plaza Harbor
Paradise Cay Yacht Harbor
Pelican Harbor
Richardson Bay Marina
Sausalito Cruising Club
Sausalito Marine Harbor
Sausalito Yacht Club
Sausalito Yacht Harbor
Schoonmaker Pt. Marina
The San Francisco Yacht Club

North San Francisco

San Francisco Marina Yacht Club
East Harbor
Yacht Harbor

  • On the day, I’ll keep you posted via text on the progress of the cleaning.


    It begins with a full comprehensive inspection of your boat to evaluate its condition. This includes checkups such as:

    Hull examination

    I’ll check for any signs of damage from dents, cracks, corrosion, and blistering. This examination is vital to ensure there aren’t any structural problems affecting your safety.

    Paint condition

    Anti-fouling paint or coatings deteriorate over time. I’ll assess the condition of the protective layer, ensuring it is effective in preventing marine growth and fouling. If the paint is compromised, it will need to be reapplied.

    Zinc Anodes

    Sacrificial zinc anodes are used to protect the hull from corrosion due to electrolysis. If they are compromised, I can replace them on the same day.

    Propeller and running gear


    Inspecting the propeller and running gear can reveal damage or fouling that may be affecting your vessel's performance, fuel efficiency, and stability.

    Thru-hull fittings


    These components create an opening through the hull that allows for the passage of water and gas through the boat. Poorly maintained or improperly sealed thru-hull fittings can lead to water ingress, hull damage, or even sinking.

    Rudder shaft


    A worn out rudder shaft could decrease your boat’s maneuverability. With time, the rudder shaft may show signs of stress cracks and damages.

     

    All of the above services are included in your hull cleaning process. 



     

    You’ll never have to worry about any surprise fees on your final bill.

  • I love sharing my knowledge with others and want to make sure that every client has a solid understanding of their boat’s condition and what they can do to prolong its life and performance.


    At the end of every job, I’ll provide a detailed, transparent report which includes: 

    • The initial assessment of your boat’s condition

    • A summary outlining all the work that was completed

    • A list of recommendations for repair or upkeep work that may be needed for specific components

    • A debriefing call to answer any questions

    • Before and After photos are available for an additional fee

  • Clients often choose us for our extensive diving experience and because we provide the peace of mind that everything was done correctly and transparently. We use specialized tools to ensure a thorough and safe cleaning that protects your boat’s finishes. In other words, we do it right the first time and help you avoid headaches and costly repairs down the line.

  • Cleanings are typically done in 1 to 3 hours. This may vary based on the size of the vessel and the extent of cleaning required.

Frequently Asked Questions

Simply email me at pcresalia@gmail.com or fill out the form below and get a response within 24 hours.

Providing Marin County with fast & reliable expert service

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