To make it a bit more fresh and comfortable within the boat we replaced all the old hull insulation with a new thicker one. The insulation we chose was made of 5 mm polyester foam topped with a layer of fake leather in off white.
First off we cleaned everything with T-röd. Then we used an awesome glue, completely free from any smell, which was called CascoFlex. We applied the glue on the wall and put up the insulation right away. After the insulation was stuck on the wall we had to work a bit to make sure all the air bubbles was pressed out. Took half an hour or so before the glue was completely dry and the result was great!
(Before we insulated the forepeak we made sure to paint the roof and parts of the hull sides.)