Deck core

[Dieselmech]

Ok I will further investigate the two layers. Thank you all!! I did think it weird that there wasn't any ply layers.

[smj]

Originally Posted by Dieselmech

Ok I will further investigate the two layers. Thank you all!! I did think it weird that there wasn't any ply layers.

Is it a teak deck and if so, are you planning on removing the teak?

[boatpoker]

Originally Posted by Dieselmech

Hello all!

Is this Ply or Balsa?

Also going off the bottom layer of glass in the images would it be easier to find large sections of rot and delamination by tapping/pushing on the bottom layer of glass? Or on the top once the teak has been removed?

Cheers!Attachment 266639Attachment 266640Attachment 266641

You will learn nothing from tapping or moisture metering on the teak (if that is teak decking), You might learn something from the underside if you have access.

Try this for a little info on tapping and moisture metering.
Moisture Meter Mythology

[Dieselmech]

This was to install something I'm gueessing a long time ago.
Sorry I never really gave context, I don't own the boat but it's a boat I'm looking at buying and wasn't sure on the deck core... an Adams naut 40 is the boat and it's relatively old(80's) so no need to glue anything back in all is good!

I just no for a fact there's areas around stanchions that are rotten. Which I'm assuming would of had ply placed under them.
The teak decks 100% need to be removed but I have a lot of time and have done fibreglass work on my old Cat so I think I could tackle the job I'd just set aside a good amount of time to get it sorted if I buy the boat. So just getting clarification about the materials as there's not a lot of information.

[s/v Jedi]

Originally Posted by Dieselmech

This was to install something I'm gueessing a long time ago.
Sorry I never really gave context, I don't own the boat but it's a boat I'm looking at buying and wasn't sure on the deck core... an Adams naut 40 is the boat and it's relatively old(80's) so no need to glue anything back in all is good!

I just no for a fact there's areas around stanchions that are rotten. Which I'm assuming would of had ply placed under them.
The teak decks 100% need to be removed but I have a lot of time and have done fibreglass work on my old Cat so I think I could tackle the job I'd just set aside a good amount of time to get it sorted if I buy the boat. So just getting clarification about the materials as there's not a lot of information.

I am not familiar with that boat but good design would have tapered out the core to solid fiberglass all around the deck to hull joint, incl. the area of the stanchion bases.

[SofaKingFishy]

End grain Balsa.

[Cheechako]

It's balsa. You may be seeing lines from the coring hole saw angle or something. Although, as we have no perspective, but the balsa looks much thicker than most...? Most deck cores are like 1/2", how thick is that? It appears to be really thick.... maybe it's layers of balsa?

[boatpoker]

Originally Posted by Cheechako

It's balsa. You may be seeing lines from the coring hole saw angle or something. Although, as we have no perspective, but the balsa looks much thicker than most...? Most deck cores are like 1/2", how thick is that? It appears to be really thick.... maybe it's layers of balsa?

I think you are right. It looks like a very thin layer and a thicker layer.

[wing15601]

Looks to me like wood on top and a thin layer of bedding compound of some kind then the glass deck, balsa core and bottom glass layer.

[s/v Jedi]

Originally Posted by Cheechako

It's balsa. You may be seeing lines from the coring hole saw angle or something. Although, as we have no perspective, but the balsa looks much thicker than most...? Most deck cores are like 1/2", how thick is that? It appears to be really thick.... maybe it's layers of balsa?

I have 1” balsa core, which is pretty much standard I think?

[s/v Jedi]

Here is my hull above waterline

[rslifkin]

Deck thickness varies depending on the design. My own decks are cored with 1/2" thick balsa, for example. But a builder wanting stiffness in a larger unsupported span would use a thicker core to get more stiffness without needing thick, heavy outer skins.

[Mike OReilly]

Originally Posted by s/v Jedi

I have 1” balsa core, which is pretty much standard I think?

That’s what we have, but I doubt it is standard for most boats out there.

[Searles]

It’s multiple layers of balsa ,probable about 6 to 10 mills per laminate may or may not be set in polyesters resin ,usually done this way for curved surfaces ,mostly in older Asian builds .⛵️⚓️

[boatpoker]

Originally Posted by Searles

It’s multiple layers of balsa ,probable about 6 to 10 mills per laminate may or may not be set in polyesters resin ,usually done this way for curved surfaces ,mostly in older Asian builds .⛵️⚓️

Never seen end grain balsa core the thickness of 10 human hairs.