Floor in a 1977 Trojan F26

[Chqcruisin]

The floor on my starboard side is soft/spongy right where you would step down to get on the boat. Thought i would come here looking for advice to be honest. Boat has been in my family for about 30 years. Just inherited last year and been slowly working on it to bring it back to its former glory.

[prowlersfish]

Best way is to cut it out, replace the core, and reglass it. Injectadeck is another option. Look around on the site for photos of both