Ability to climb stairs/ladders, be exposed to environmental conditions such as hot and cold temperatures, be exposed to high noise levels, exposure to mechanical parts as well as dust/fumes/mist/gas, and ability to walk extensively and ok with heights. Johns Manville is a proud member of the Berkshire Hathaway family of companies, serving customers in more than 80 countries, supplying innovative products to the construction, aerospace, automotive, filtration and energy industries.