Show insulating material marks year NEW YORK americas oldest insulation is celebrating its one hundredth anniversary this year it is mineral wool which was first made in wales england in 1840 and was introduced into this country in 1867 since that time it has been used to insulate hundreds of thousands ot of homes one of the oldest ot of such home installations still exists in salem va it is the home of mrs noah hockman which was insulated in 1882 almost 58 years ago the mineral wool used in this house bouse is still in perfect condition mineral wool has achieved its present countrywide country wide acceptance only in the last two decades new methods of fabrication and distribution have taken it out of the luxury class and made it easily available to home owners in every income group |