Corecell Sandwich Construction
Key advantages of Corecell foam cores
Zero water absorbtion
Corecell foam is a closed-cell structure that will never rot or absorb water. Balsa core, on the other hand, shows its weakness when exposed to water. Balsa will soak up water from any small cracks or weakness in the skins and has no resistance to water permeability. This leads to rot, loss of structural integrity, weight gain, and undermines the longevity and resale value of the boat.
Elastic enough to flex slightly on impact
The core also needs to have enough elasticity to absorb impact and maintain the bond to the skin. The Corecell foam acts as a shock absorber that supports the outside skin from severe impacts and protects the inside skin by dissipating the impact load over a wider area.
While Balsa core may be stiffer, it is also brittle. Brittleness leaves the core vulnerable to crack spread as the sandwich panel continues to flex on impact.
Because Corecell does not absorb water, even if there is structural damage to the fiberglass, it will last much longer, and cost much less to maintain over the lifetime of the yacht. This is one of the reasons we've never had an issue with our core getting soft or rotting out like so many other balsa wood core boat experience.