On Fri, 7 Apr 2006 11:48:25 -0400, "GBM"
wrote:


"dog" wrote in

GM

Might also want to rethink the use of polyisocyanurate foam as it
produces extremely toxic gases in the case of even a small fire.


Dog - All foams are flammable and produce gases when burning. That is why I
was asking about types of fire barriers. Polyiso has some advantages and
disadvantages when exposed to fire - See:
http://www.pima.org/technical_bulletins/tbull105.html

In production boats, the icebox foam is usually encased with a thin layer
of glass/resin - not much of a fire stop. Adding 1/2" of plywood apparently
gives you about 10 minutes minimum before fire reaches foam.

Other foam on the boat, such as in the berth cushions is likely a bigger
hazard when burning than any foam around the icebox. We, and likely many
other boaters, have a heater located on a wood bulkhead, within a few feet
of a foam filled berth cushion!

Hi,

If plywood is not enough then a layer of intumescent paint or coating
will give more fire resistance.

cheers,
Pete.