Is under-floor flotation foam structural in 1992 1800 XR?
As per title, I need to know if the nasty foam that was filling the entire under-floor area is a structural component of the boat. I had a rotten area of floor and have now ended up stripping out the lot, including the two main stringers. I don't really want to put the foam back. The above deck 'boxes' that were foam filled were also rotten in places so they've all been cut out too. I want a much cleaner, more open look once it's finished. My thoughts are that I could install ribs (lateral reinforcing boards, I think they're called ribs!) from the stringers to the boat sides at the plywood floor joints. Would the ribs be adequate reinforcement in place of foam if the foam was indeed there for structural reasons? The hull is fairly thin and deflects considerably if stood on.
Maxum 1800 XR 1992