Check out these Amazing Vintage Advertisements from Armstrong's Cork board Insulation from the late 1920's! What was said back in the roaring 20's still holds true today! The Insulating benefits from Natural Cork are simply astonishing!
The World may have changed quite a bit in the time since Armstong's Advertising campaign (as you can probably tell simply by the style of writing and language) However the message of low cost heating, cooling and extremely high levels of efficiency seem to be more applicable today than Armstong's could have ever imagined nearly a Century ago.