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Old 14-11-2016, 10:24   #1
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possible bulkhead compromise?

Hi all. Longtime lurker - first time poster.

We are in the process of purchasing a 2010 Lagoon 440. Sale price has been agreed upon and now in midst of survey. Our surveyor identified slight separation/gapping of the veneer covering the port forward bulkhead - the one in-line with the mast. The separation at veneer joints is no more than 3 mm but runs along the entire archway as one enters the port birth.

She otherwise appears to be in excellent condition and very well cared for. No history or evidence of other structural damage. She has crossed two oceans.

The optimist in me wants to believe this finding is simply due to differential flexing between the underlying bulkhead and the superficial veneer but the pessimistic part of me worries about compromise of the underlying structural bulkhead.

My questions to you all:
1- Has anyone else experienced this phenomenon with their veneer and found any major issues associated with it?
2-Are there reports out there of bulkhead issues beyond the detabbing issue I ran across on CF?
3-My surveyor doesn't see an easy way to thoroughly evaluate this bulkhead without removing the veneer. Should I request or insist the owner provide proof that this bulkhead is structurally sound?

Any thoughts greatly appreciated!
mj
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Old 14-11-2016, 11:17   #2
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Re: possible bulkhead compromise?

Can you post a pic? 3mm is not a big deal and those Lagoons flex somehow, but for peace of mind I would ask to see the tabbing at the bulkhead. If the tabbing is broken is something to consider , otherwise is just cosmetic in my opinion, but hard to be 100% sure without see some pics.
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Old 14-11-2016, 13:12   #3
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Re: possible bulkhead compromise?

Thanks Neilpride.
Both pics are of the entry to the port forward berth. The first is looking in to the berth. The second is looking out from berth.
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Old 14-11-2016, 13:33   #4
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Re: possible bulkhead compromise?

Where there's smoke . . . there's fire. I would not purchase the boat without a thorough inspection/certification and a post-sale guarantee of some sort. Good luck and safe sailing.
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Old 14-11-2016, 13:38   #5
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Re: possible bulkhead compromise?

Two options we engineers offer. Non destructive testing or intrusive inspection.

Unless you have a good reference / baseline NDT is likely not a practical option.

I'd like to see the structure behind the veneer to be exposed if I was the potential purchaser. You could negotiate with the owner to expose it or offer a lower price.

These investigations can often dive deep into other areas. You don't often know what ypu're looking for until you find. It pays to be inquisitive.

These are probably the more practical options.

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Old 14-11-2016, 13:46   #6
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Re: possible bulkhead compromise?

I would join the Lagoon Owners group on Yahoo Groups and ask this question there.

Honestly, it looks to me like the veneer has shrunk, was laid on when it was wetter than the underlying wood, but it's hard to tell from the pictures. If there were real flexing of the bulkhead I would expect to see more detachment or actual cracking of the veneer, if anything.
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Old 14-11-2016, 14:34   #7
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Re: possible bulkhead compromise?

As crack is A shape and not V shape, only way I can imagine this could have happened if boat was flattened, like large volume of green water crashing on top of the boat.

IF that was the case, very unlikely this is the only issue. Looking at bulkhead to hull attachment should produce more evidence of sudden flex.

Check the hull bottom under for any cracks or fix of it as hull is made of 2 sides and in middle is joined.

if you find nothing is likely cosmetic imperfection.
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Old 14-11-2016, 14:43   #8
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Re: possible bulkhead compromise?

Cosmetic prob,,,, they flex and groam In seaways , like the dealer told me before to departure with a brand new 380 , close the cabin doors before sailing.... I mean whats the purpose of a huge gap between the frame cabin door and the door...??? lol
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Old 14-11-2016, 17:47   #9
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Re: possible bulkhead compromise?

Thanks for everyone's observations and thoughts. When i meet with the surveyor again next monday, I will make sure to review all the visible tabs. Leaning towards having a more invasive evaluation done as leftbrainstuff suggested.
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Old 15-11-2016, 04:38   #10
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Re: possible bulkhead compromise?

If there was indeed a crack in the plywood bulkhead, how should it be repaired?
Just fill the crack with putty, or use some glass to reinforce it?
Can the veneer be re-applied in-place over the repair, without dismounting the bulkhead?
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Old 17-08-2018, 11:55   #11
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Re: possible bulkhead compromise?

Quote:
Originally Posted by Idaho Sailors View Post
Thanks for everyone's observations and thoughts. When i meet with the surveyor again next monday, I will make sure to review all the visible tabs. Leaning towards having a more invasive evaluation done as leftbrainstuff suggested.
Sorry to resurrect this, but I was just curious as to how this ever turned out...
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