A wooden boat will require the most attention, though not necessarily the most maintenance, to ensure it remains waterproof. Regular checks on the paint work are essential and repainting and varnishing it when needed is recommended. You will know when your wooden boat needs some TLC just by looking at it but as a rule-of-thumb give it a one-coat covering of varnish once per year and a sanding and full repainting every 3 – 4 years is advised.