Lagoon 400 bulkhead joint spreading

[diverdown516]

I have been looking to purchase a Lagoon 400. In a recent survey of a 2012 model, the surveyor noted the bulkhead joint spreading above the doorways in the owners cabin. There were no underlying cracks in the structure and he stated this was a common problem on this type of yacht. Is this a known issue with owners versions and does it make it unsafe for ocean crossings?

[44'cruisingcat]

There is a known issue with a bulkhead on one of the circa 40 foot Lagoon models, could be the 400. Lagoon acknowledges it's a build fault, and they pay for the repair. This might apply to your boat. Could be worth contacting Lagoon, costs nothing to ask.

Also, there's a Lagoon "sub" forum here, http://www.cruisersforum.com/forums/f139/ some of the members will likely know more about it than I do.

[arsenelupiga]

never heard about this one.

When sailing there are few/if any forces in this area.

So my guess would be damaged when boat lifted incorrectly.

Nacelle issue build fault is a different thing and you should check whether any damage in front bulkhead and if there was fix to enable drainage. See link c44 provided for details.

[tuskie]

The "bulkhead" photographed is not structural, and is differently configured on other layout configurations of the Lagoon 400. A clamp and some glue could be used to rectify if it bothers.

As 44C and Arsenelupiga have mentioned in previous responses, anyone considering buying a Lagoon 400 should be aware of the main bulkhead issue:

http://www.cruisersforum.com/forums/...ge-164462.html

This issue is a serious structural issue that is a recognised fault in the Lagoon 400 model and has/is being repaired by Lagoon as a warranty claim.

I'm sure that any reputable surveyor would or should be across this issue and thus ensured that the repair was either carried out competently or did not exist in this particular vessel. Once this issue is rectified correctly the bulkhead should be of design strength or stronger. No recurrence should happen.

BTW, friends with a 6 year old Lagoon 400 are currently undergoing this repair at Lagoon's expense in Brisbane, Australia despite their boat being outside the 5 year hull warranty period.

Good luck with your survey.

[GordMay]

Greetings and welcome aboard the CF, diverdown.

[meirriba]

Originally Posted by tuskie

The "bulkhead" photographed is not structural, and is differently configured on other layout configurations of the Lagoon 400. A clamp and some glue could be used to rectify if it bothers...

.

In which configuration there is no doorway bulkhead to aft cabin/s? I have seen 4/3/2 cabins configurations - all have aft cabins and bulkheads at the entrance, (with or without a door).
The bulkhead gives some athwartships rigidity to the hull. However, as far as I can judge from the picture, the movement was slight. What needs to be done is to be sure, is to look at the hull in the area from inside and check for stress cracks. If no cracks present then all is fine.

[tuskie]

Originally Posted by meirriba

In which configuration there is no doorway bulkhead to aft cabin/s?

The 4 cabin version has 440mm rear doorways that abut a fore-aft wall (also non-structural) which is the inner side of the heads compartment. The owners version have no doorway, just a 860mm opening instead.

I agree that any gaps or cracks should be investigated but make two points; Lagoon design allows for a variety of internal configurations, some of which use non- structural "walls" which must be able to move slightly as the hulls flex. Secondly, Diverdown516 should not be distracted by "cosmetic" flaws and possibly miss less visible but much more important issues.

[Rumbottle]

I have surveyed a larger Lagoon catamaran and noted that bulkheads were joined to the hull with a very hard compound and not overlaid with a grp cloth to spread the load. In some places the compound had cracked (see photo below). Lagoon did not accept liability.

[diverdown516]

Thank you all for the information. I will pay close attention to the survey results. I'll contact Lagoon if I find something.