Injectadeck foam

[Geek_Guy]

Any opinions on filling a deck delamination with 'Structural foam' rather than fiberglass?

Seems that the process would be much easier.

[psk125]

Depends what the loads are. Don't want the foam to get compressed, for example. What "fill" are you aiming to replace?

[coopec43]

Originally Posted by Geek_Guy

Any opinions on filling a deck delamination with 'Structural foam' rather than fiberglass?

Seems that the process would be much easier.

I'd ask the same question as psk125.

Is it two layers of fiber-glass that have de-laminated or has the fiberglass become de-laminated from the core? You haven't given us much to go on!!

If it was in a vital part of the yacht eg. chain-plate or stanchion I'd grind off the delamination and repair it properly by laying new glass.

But if it was just a bit spongy underfoot I'd drill a hole and inject epoxy (or polyester) resin with a syringe. BUT doing that be be extremely careful that the resin used in the repair doesn't overheat and start a fire. (Have buckets of water and rags available if necessary)

https://www.youtube.com/watch?v=OvEelWUNYM0

Clive

[Geek_Guy]

The deck is wood core with 2 layers of glass. The port lights had leaked and rotted the wood core. The deck is spongy to walk on. The location is not around critical structural components.

But you make a good point that epoxy would pour in as easily as foam.

[a64pilot]

There are injectable foams sold that claim to be specifically just for this.
I believe the need moisture to activate, and I think claim to absorb moisture.
There is precedent, a lot of it, it’s how honeycomb structural panels that have disbonded on aircraft are repaired.
Biggest problem I see with it working, is how do you remove the “mush” first? You know all the rotted wood?