J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment Drying Balsa Core with Vacuum and Heat

Black balsa is definitely too far gone. It probably smells pretty bad which is another indicator. I was getting water draining out of the center laminate in this area for weeks. That's when I decided to grind that back and lay up multiple layers of 17 oz biaxial cloth to build it to the original thickness.