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 Process Safety & Development Specialist Don't repeat history, unreported chemical lab/plant near misses at http://www.crhf.org.uk Only two things are certain: The universe and human stupidity; and I'm not certain about the universe. ~ Albert Einstein
