Originally Posted by Bradlesh
2 layers of XPS?
Saying that multihull designer Kurt Hughes from memory used ply xps ply to do bridgedeck panels on large catamarans so that would be up for the job
And I have seen same panels used for cabin sides and roof on other structures.
Logic says that XPS could,would, should work with glass but it would need a much heavier glass layup as the foams compression strength isn't that great.
I should add, those panels I am talking about are much thicker.
BD panel around 100mm and wall roof panels around 50mm so no, I don't think XPS would be a good choice for your project