P&S Marine is an engineering company based in Croxley Green, Watford (on the Grand Union Canal) specialising in canal boat craneage and all forms of boat maintenance, repair and installation. We offer quality, professional services at competitive prices concerning any aspect of canal boat maintenance that you may have.

With our water frontage and road access we are able to accommodate up to 70 foot vessels, both wide and narrow making us the boat yard closest to London for canal boat craneage. Our C110 NCK Rapier Eiger crawler crane has a maximum lifting capacity of 70 tons – enabling us to accommodate any vessel on the canal system. Cranage of boats off of road transport and into the water, or vice versa, is a common operation at P&S Marine, and through our many years of operation and experience our professional lifting capabilities have developed a long standing reputation.

Learn more about our craneage services

Most aspects of boat maintenance can be undertaken at P&S Marine. Our workshops and skill sets enable us to undertake the following plus many more:

  • Pressure washing & hull blacking

  • Grit blasting & 2-pack epoxy coatings

  • Engine servicing & installation

  • All aspects of steelwork including hull over-plating

  • Short & medium term hard standing

  • Surveying (carried out by third parties)

  • Heating & plumbing

  • Carpentry


A regular maintenance program is a must for any canal boat. It’s generally recommended that steel hulls should have new protective coatings applied every 2-3 years. At P&S Marine we provide hull blacking services where you can choose to black your boat yourself (DIY) or let us do it for you (P&S Blacking). We can provide high quality, premium bitumen or your welcome to use your own. Other materials such as paint trays, roller handles, brushes, white spirit, disposable gloves etc. we also have in stock.

As well as ensuring that your hull has adequate protective coatings, we recommend fitting galvanic protection in the form of magnesium anodes. While your boat is out of the water you can choose to have additional anodes fitted or depleted ones replaced.

5ltrs of SML Ballistic Black
Learn more about hull blacking
Learn more about anodes

The other option for protecting the hull of your boat is to have it abrasive blasted so that a 2-pack epoxy coating can be applied. This has the benefit of being longer lasting compared to standard bitumen as well as offering better chemical resistance. A boat which has been blasted and had 2-pack epoxy coatings applied does not have to come out of the water again for much longer than three years (recommended for bitumen) – usually ten to fifteen years (depending on paint manufacturer). Therefore abrasive blasting reduces the maintenance schedule needed on a hull dramatically.

P&S Marine: boat grit blasted

Grit Blasted

P&S Marine: boat primed

2-pack Primer

P&S Marine: boat with final coatings

2-pack Top Coat

Using a grade 3 iron silicate abrasive, our 400 cfm compressor and a state of the art 60 ltr grit blast pot we are able to achieve a sa2.5 grade finish which is the surface finish required for new 2-pack epoxy coatings to key to steel properly in accordance with BS ISO: 7079. At P&S Marine we apply a 2-pack primer onto newly grit blasted hulls before the 2-pack top coat ensuring a premium quality finish.

learn more about grit blasting

Popular Services Carried Out In 2020

Road to Water’s: Boats lifted off of road transport and into the water (or vice versa)
DIY’s: Boats out of the water to be washed and blacked by their owners
P&S Blacking: boats washed and blacked using airless spray by P&S Marine
Grit blasts: hulls taken back to bare steel and 2-pack epoxy coatings applied

About Us

Tom and Ralph took onwership P&S Marine in August 2015,  taking over from John Pattle and Derek Harrison – the previous partners and founders of the company.


Tom Pattle


Tom has ten years experience at P&S Marine, having undertaken an apprenticeship under John and Derek, the previous owners. Over the last ten years Tom has converted his professional qualifications into hands on experience at P&S Marine and now has a wide range of skills enabling him to undertake canal boat maintenance and repair. He has many years of MIG welding experience and an MMA qualification having taken a city and guilds welding course and has learnt much of his steel fabrication skills from John. Electrical, plumbing and heating work has been taught by Derek and he is able to troubleshoot the most common problems relating to these systems. Engine servicing and installation experience over the years enables him to carry out these tasks confidently and professionally. He is currently in the process of fitting out his own boat, NB Asopus, expanding his experience and knowledge, particularly in relation to woodwork. Tom is now the new crane driver at P&S Marine, having taken over from John.

Ralph Kitts


Ralph comes from a family with boating roots going back to 1858 when his family ran a business running steam trip boats from Stanstead Abbots and owned the land which is now Lee Valley Marina. Ralph used to operate under R.K. Marine as a mobile marine engineer, offering his own unique service around London and the home counties. His knowledge of marine engines and associated systems makes him an expert in the field. His years of experience have enabled him to become a qualified marine surveyor and a member of the IIMS. This professional qualification is a indiction of his wide range of skills associated with inland waterways craft. Over the years he has developed a trustworthy reputation over a large client base which has come about from hard work which he takes a pride in. He is passionate about his work and the challenges it provides and is well known for being available at any time to help a boater in need. His experience, friendly advice and reputable qualifications are a essential part of P&S Marine.


Had a new engine fitted by Tom and Ralph, excellent customer service, outstanding work. I always come to P&S for maintenance, wouldn’t go anywhere else now! Wish I could give more than 5 stars! Thank you both!

Great facilities and services at the yard, an amazing crane and Tom’s welding is second to none, its a pity its mostly under the waterline as it deserves to be seen!

Jan, Tug Storm

I’ve used these guys twice in three years, the first time to crane my new boat in. The second for blacking and anodes, plus general upkeep. Perfect customer service, knowledgable, helpful engineers. I can’t fault them. As a young lady bringing my boat here solo I’ve never been so relaxed or trusting in a pair of engineers. All the other boats on hardstanding are just as happy. Thank you so much for the 5 star service. Use P&S Marine, you won’t be disappointed.

April, NB Bohemian

Great! Blacked my 1920s widebeam here, the guys are very helpful, honest, and knowledgable. Couldn’t reccomend enough. Thanks so much Ralph and Tom.

Chris, WB Fifty Seven

Friendly, professional service and most importantly, safe handling of our pride & joy!! Always available to offer advice and support whether you are working on the boat yourself or paying them to. Would highly recommend to anyone who loves their boat, wants solid expertise and no unnecessary ‘extra’ jobs recommended to bump up the bill. Thank you!

Kate, WB Doris

Procured a hull survey on a narrowboat from Ralph, very thorough professional and helpful, Delighted.


Instead of stress and hard work, I had a lovely time blacking my boat at the marina which is a peaceful and nice place to be in, surrounded by trees. The facilities are great and the staff professional, friendly and helpful. The price for lifting and paint etc. is also very reasonable. Highly recommended all around.

Emma, NB Miss Behavin

A professional efficent service to lift my dutch motor cruiser into the canal Tom helped me by allowing me to stop 2 nights whilst I sorted the electrics on the boat, great service I would recomend this boat yard


Contact Us

Please feel free to contact us with any questions queries you may have – give us a call or drop us an email or better yet, come and see us! If you can’t reach us on the office number please try one of our mobiles.

Contact Us
  • Office: (main line) 0800 170 7276
  • Tom (bookings) 07479 514 072 (used for IM, calls ported to 0800)
  • Ralph: (technical enquiries) 07956 333 892

Working With:


Our yard is at the back of Bridgewater Basin off of the Grand Union Canal in Watford. Please make it clear to marina manager at the front gate who you are there to see before following the road to the right and heading for the crane.

P&S Marine

Bridgewater Basin
Watford Road
WD18 8SN