Common Yacht & boat problems seen on survey.

Here is hard spot cracking over a vertical bulkhead, the hull flexes over the hard spot cracksrigid bulkhead & eventually fractures. The more flexing, the deeper the cracks, the weaker the area

 

 

 

 

 

 

This hull has been painted & the blisters seen are not osmosis but merely blistering under paintmoisture affecting the paint adhesion, however it is still a moderately expensive rectification if done to a professional standard (re spraying) but not structural.

 

 

 

 

 

strained moulding

 

Quite common on some classes, the deck is not rigid enough to support tight rigging loads on its own.

 

 

 

 

 

Stress cracking caused by thin laminate simply flexing because it is thin laminateunderweight

 

 

 

 

 

 

 

 

When doing surveys, cracking of gel coat caused by impact can often be seen impact below antifoulingbelow the gel coat such as here. Ultimately the area would have to be further examined & in many cases re-strengthened. Enlarge the photo to see more clearly

 

 

 

 

Westerly Centaur rudder stock is bent, it should not be almost touching the bent rudder stockhull at the aft tip. These rudders & similar rudders fitted without any lower support are very susceptible to contact bending & in extreme cases the bend can be so severe that the rudder jams on the hull.

 

 

 

Looking at the top of a rudder, see where the grp has cracked because the rudder crackingrudder stock has been flexing in the moulding.

 

 

 

 

 

 

 

 

Bonding fractures such as this are not uncommon, they will be seen on bonding failuresupporting structure for twin keels, bulkheads, fin keel support floors & much more. Always an indication of high stress.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

More common than it should be, such a risk for crew members. Easily seen corroded guardlineonce broken, but what about just before it breaks?

 

 

 

 

 

 

 

Stainless steel rigging is perfect...until it breaks, no warning of work stranded rigginghardening which it commonly suffers from. It comes as no surprise that insurers prefer you to spend a lot before they have to spend a fortune.

 

 

 

 

Gas system installation does vary from boat to boat, in this case the thingas pipe kinkwalled copper line has kinked, always use the thick walled line as it does not easily kink in these situations.

 

 

 

 

 

 

Corrosion staining like this suggests problems inside the rudder, look at the rudder corrosionnext photo in this list & see why.

 

 

 

 

 

 

 

Inside the rudder of a small GRP sailing boat rudder. Mild steel rods inserted rusted rudder tangsinto bronze rudder stock. Inevitable area for corrosion. Good builders use stainless steel stocks & stainless steel tangs all welded.

 

 

 

 

Osmosis blistering beneath the antifouling on a large Westerly. This was osmosis blisterslater stripped & found to have very high moisture meter readings & excessive blistering. Possibly not structural, but definitively undesirable & the seller will have to reduce the price in this case. Click the photo to see how large these are.

 

 

Hardly ever seen in this country, but teredo worm also known as shipworm teredo wormwhich devastated the English navy ships of the 1700's can still destroy timber vessels if not fully protected. Copper sheathing was introduced to combat these to try to save the English fleet from attack.the hole is just the exit point, the timber is completely riddled & now honeycombed.

 

 

Seacocks & associated pipework are possibly the most common problem, failing gate valveResponsible for sinking more boats than anything else, failing skin fittings & valves will cost a lot more that people might imagine. Gate valves are notorious for internal failure.

 

 

Anodes can cause seriuous damage to timber boats. Here the anode has anode damagebeen removed but as it was being changed the backing washer & nut simply fell through the weakened timber as soon as the fwd. bolt had been taken off. The vessel could have easily sunk without warning because of this.