General Info: Lagoon delamination or osmosis does anyone had experience?

[minaret]

[Lagoon4us]

Originally Posted by meirriba

I did not ask Lagoon for warranty fix. The area was fixed without charge by the boatyard as part of the jobs they did on the boat during the liftout.
I have notified my agent. No real response as of now...

That's a very charitable boat yard you've found, for the so called de-lamination to be exposed as it shows in the picture was it hit with a pressure washer that opened it up like that?

Looks like a total dry spot?

Maybe a Croissant was dropped during layup, interesting stuff, shame pic's prior weren't taken.

Why is the yard repairing gratis? Were they involved or just really nice peoples??

As i say interesting

[meirriba]

They had a lot of work on the boat and took this issue in their stride.
And - yes, they are very nice people...

[Lagoon4us]

Good to hear :-) Cheers

[rabbi]

Originally Posted by meirriba

They had a lot of work on the boat and took this issue in their stride.
And - yes, they are very nice people...

But you are sure that this was present before the liftout? Looks like an impact damage to me.

[Lagoon4us]

Originally Posted by rabbi

But you are sure that this was present before the liftout? Looks like an impact damage to me.

With you there, de-lamination is the parting of ways between two layers whereas this looks like a damaged spot or holiday in the glass that's been tortured with a water blaster...

Never in my life have i heard of a yard 'just fixing something' i would have wanted Lagoon there in the form of an agent or representative to document.

At worst your whole boat could be dodgy as it can happen at best this was an accident that was repaired, either way now it doesn't qualify as de-lamination nor osmosis as it's been repaired by very nice people....

[boatpoker]

Having found an area of a Lagoon 440 hull that was only 3mm thick (in an uncored area around the drive leg), I wouldn't be surprised to find that an overly agressive power washer could damage it.

In the photo below you will see that removing the cover plate actually tore off the gelcoat. An awl with a bent tip was hooked in the hole in the laminate, The hole was created by pushing my car key through the laminate, a piece of electrical tape was applied to the awl against the hull. When the awl is removed, the distance between the tape and the hook is the thickness of the hull ...... scary.

[minaret]

Originally Posted by boatpoker

Having found an area of a Lagoon 440 hull that was only 3mm thick (in an uncored area around the drive leg), I wouldn't be surprised to find that an overly agressive power washer could damage it.

In the photo below you will see that removing the cover plate actually tore off the gelcoat. An awl with a bent tip was hooked in the hole in the laminate, a piece of electrical tape was applied to the awl against the hull.
When the awl is removed, the distance between the tape and the hook is the thickness of the hull ...... scary.

That's beyond scary, that's criminal! Very revealing. Just goes to show, the pics from the Lagoon which had its bottom ripped out on a reef last spring were not an anomaly. I couldn't believe how thin the uncored solid glass layup was on a boat that size. That's the average thickness of a sea kayak, not a yacht!

[Factor]

Originally Posted by transmitterdan

I guess you need to know if it is osmostic blistering or delamination. The first is common in all boats not just Lagoon. The second is generally uncommon. Delamination can be repaired by the same method as impact damage.

No it is not.

[boatpoker]

When people use the term "osmotic blistering" I'm never sure of exactly what they mean. Osmosis Testing

[colemj]

Wait a minute. That existing hole clearly shows a thick core there. And what you are poking into is clearly some type of backing plate. I think you found a void in a backing plate. I see no evidence that you are measuring the thickness of the actual hull itself.

Can you state that you were able to insert that pick more than 1" into that hole?

Mark

[colemj]

Originally Posted by minaret

That's beyond scary, that's criminal! Very revealing. Just goes to show, the pics from the Lagoon which had its bottom ripped out on a reef last spring were not an anomaly. I couldn't believe how thin the uncored solid glass layup was on a boat that size. That's the average thickness of a sea kayak, not a yacht!

You disappoint me here minaret. There is clearly enough in that picture for a professional like you to ask some basic questions before jumping in on what appears to be a preconception of yours.

Mark

[boatpoker]

Originally Posted by colemj

Wait a minute. That existing hole clearly shows a thick core there. And what you are poking into is clearly some type of backing plate. I think you found a void in a backing plate. I see no evidence that you are measuring the thickness of the actual hull itself.

Can you state that you were able to insert that pick more than 1" into that hole?

Mark

The "existing hole you see is a collar in the molded engine bed through which the drive leg passes. Where you see my car key disappearing is an uncored area of the hull. The white area in the infrared photo is getting near paper thin ( well very thick paper )

[colemj]

OK, I have the perspective now.

You are not poking into the hull at all and cannot make any claims about hull thickness. Saildrives are mounted on a fiberglass bed assembly provided by the engine/drive manufacturer. A hole is cut in the hull for the drive leg and this assembly is glassed onto the hull. A thin cover plate is then slipped on and attached to the hull to fair most of the hole. A rubber membrane is glued to this cover plate to complete the fairing.

You are poking through that fairing plate and into the void of the hole cut in the hull. You are not poking through the hull itself.

You can even see the "ring" of the drive hole underneath the cover plate in the IR image.

Mark

[boatpoker]

Originally Posted by colemj

OK, I have the perspective now.

You are not poking into the hull at all and cannot make any claims about hull thickness. Saildrives are mounted on a fiberglass bed assembly provided by the engine/drive manufacturer. A hole is cut in the hull for the drive leg and this assembly is glassed onto the hull. A thin cover plate is then slipped on and attached to the hull to fair most of the hole. A rubber membrane is glued to this cover plate to complete the fairing.

You are poking through that fairing plate and into the void of the hole cut in the hull. You are not poking through the hull itself.

You can even see the "ring" of the drive hole underneath the cover plate in the IR image.

Mark

Yes, as previously stated there is a moulded bed bonded to the inside of the hull. As clearly shown in the photos the cover plate has been removed and the key is inserted into the hull within the area of the engine bed.

There is a limber hole in that bed on the interior and constant water flow from that limber hole was the reason for the investigation.