Just started a tear down of a 1997 sun tracker party hut with 10ft cabin enclosure. Like many the cabin walls are rotted and water logged. I'm trying to determine a good option for replacing the walls which are 1" thick and mounted in aluminum H channel. Trying to find something that is both light, waterproof and 1" thick in 4'x8' sheets is proving difficult. I found a composite fascia board type material but it's not 1" thick. I did find an insulated aluminum panel which would be perfect if not for it being $316 a piece plus shipping. I will need approximately 8 sheets, maybe more if we extend the cabin to enclose the rear of the boat which is currently open. If anyone has a source or ideas on wall replacements please let me know. We are pretty much at a stopping point on this rebuild until we figure out these walls. Thanks for any and all info!