Hi,

I'm about to start building a 37ft Van de Stadt from an aluminum kit. One
area of boatbuilding that seems to get skimmed over in all books is
insulation.

I have access to sheets of polystyrene. Is this any good for metal boats? Or
should I stick with polyurethane?

I'm also investigating a Swedish product called Moniflex which is used
extensively in passenger trains because it's light, fire-resistant and
flexible, which sounds perfect for boats. Does anyone know anything about
it?

Many thanks
Rogermac