Wednesday, October 24, 2012

General Maintenance Part I: Hull

The hull is the part of your boat that keeps you floating and thus quite an important one. Keeping it in good shape is essential for a good sailing experience, and the effort to achieve this depends hugely on the type of Gulet you have. In this article, I outline the different basic maintenance tasks a neat hull requires.

In order to estimate the amount of care that will have to be dedicated to the hull, it is useful to think of the different materials it can be made of and the resulting specific maintenance needs.

The first material to think about is the classic one: Wood has been used in boat building ever since people have built boats. It looks good, feels natural, but is generally heavy and requires a great deal more work than GRP. The wood itself is always protected by at least one layer of paint, epoxy resin or other finish.

If this finish is damaged under physical pressure and parts of it rub off, the damage needs to be fixed to prevent water from getting in between the protective layer and the wood. It might be necessary to sand the affected area; for large-scale repairs, you might have to strip off a larger part of the hull. Take care to roughen the surface in order to increase the adhesion of the paint.

The finish on wooden hulls normally needs to be polished once a year. Fall is a good season for that, in the course of winterizing the boat. Depending on the quality and type of paint that you use, your finish should last for 3 to 7 years.

Hulls of some Gulets are made of metals, most commonly steel or aluminum; the are durable and require less work than wooden ones, however, don’t meet some (traditionalist) sailor’s aesthetic preferences and are not the ideal material for small boats. Much like wood, steel hulls come with a finishing layer of paint. Maintenance work for steel and wooden hulls is very similar, too.

Aluminum hulls are a different story; the material is light and very easy in maintenance, but expensive. If you apply paint to an aluminum hull, than essentially for aesthetic reasons – if they are left untreated, you will save on work and the metal’s surface will oxidize over time to an elegant gray. If you choose to paint the hull, it requires similar maintenance as steel hulls.

General maintenance work for all types of hulls

General tasks that you will have to apply to any type of hull include a variety of minor things that you should do frequently. They might seem like common sense, but nevertheless, they are often neglected:

  1. Check the through-hull fittings: At least once a year you should check all “holes” in the hull. Are they really sealed? Open and close sea cocks frequently to keep them in shape and grease them if necessary.
  2. Check for damages: Every time you lift your boat out of the water, check for scratches or cracks and fix them as soon as you discover them. Look at the propellers, keel and rudder and get potential damages repaired.
  3. Clean the hull once a season and apply anti-fouling paint to fight barnacles, woodworms and other unwanted visitors.
  4. Always carry a repair kit that includes duct tape for emergencies, epoxy resin, paint or gel finish matching with you boat. If you get into trouble with a damaged boat, don’t rely on your own skills but seek professional help.
  5. If there are bolts in the hull – for example in the rudder bearings – remove some as samples from different parts of the boat once a year. Check for corrosion and replace bolts as required.
  6. Keep the “hull-attachments” in good shape: Check if your keel-hull-joint is sealed properly; if openings in the hull are damaged by electrolysis (requires two different metals and seawater); if the rudder-bearings and the propeller are still flexible.


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