"Steve Toledo-Brown" wrote in message
...
IMM wrote:

But arm waving with realism. All I read is that energy will become more
scarce and more expensive. As it becomes more exp[expensive so will
insulation too. best pack it in now while it is cheap enough.

Insulation would only become more expensive if there was really a very
limited supply of raw materials for it. There's not really, is there? So
if energy gets much more expensive there'll be more demand for
insulation material, which in turn means: higher volume of manufacture
- economy of scale - cheaper product; bigger market - more
competition - cheaper product; bigger market - more incentive for R&D
to find better and cheaper insulating products - cheaper and/or better
product.

Rockwool is made by melting rocks. This is energy intensive.