--- In [email protected], "Ron Jones" <[EMAIL PROTECTED]> wrote: > > Mike Casswell wrote: > > After stalling somewhat over the winter, the refit of Jemima D is > > about to recommence. I have a few questions and would welcome any > > views, opinions or experience. > > > > We are intending to insulate using expanded polystyrene sheet. I would > > like to know what adhesive we should use to attach it to the steel > > hull and cabin. > > > > I have been told that adhesive is not necessary, that simply by > > cutting to the right size it can be wedged in place. This may be > > true, of the flat sections at least, but not where there are curves > > towards the bow. Additionally, this will introduce an air gap next to > > the steel with the possibility of just the condensation problems we > > are trying to avoid. > > Most glues dissolve polystyrene (you'll be amazed how much it shrinks, when > hit by solvent). > Why condensation? You only get that *if* the warm damp boat air gets to the > hull. By making sure the polystyrene is always slightly large, you should > stop that. If you don't then by the same reasoning the cold air from the > steel surface will get into the boat! > Thinking laterally - has anyone stuck kitchen foil on the steel before > putting in the polystyrene? That would cut down on any radiant heat > transmission. > > Ron Jones >
No, but when I re-did the back cabin I used that aluminiumised "bubble-wrap" between the polystyrene and the panels. I think it has improved the insulation and I hope it was sealed a few cracks where air could get to the metal. Anyway lets think - damp air, steel, aluminium. Well I suppose it would stop the steel rusting until the foil dissolved ;-) Tony Brooks
