Foam in a Whaler is a structural material, just not a core like we are familiar. Comparing the two was not fair, however it does show that foam in general can have its problems. Other builders like Edgewater and Everglades are especially fond of it. But that’s a completely different type of construction.
Balsa does have many shortcomings as you guys pointed out. Absorption of both water and resin is at the top. I think I’ve seen a “skinned” balsa material that may alleviate some of theses issues.
Personal opinion is that the new polymer core materials are the way to go for high end construction. As said earlier they are available in almost any weight and cut. Has any material been developed that outperforms marine grade ply for transoms?
Resin infusion is attractive for large production builders where they are trying to control VOC emissions.
The big issue with any of this is preventing water from penetrating the inner or outer layers in the first place.
