Dwight Porter, the founder of Porter Insulation Products and Porter Truss Company, has died at the age of 81 after a brief illness. 

Porter invented the modern system of insulating poultry houses in 1965. He was known for the innovative technique of installing Tri-ply dropped ceilings and his system became the industry standard in modern poultry houses with the advent of tunnel ventilation in the 1990s. 

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Porter was preceded in death by his wife, Peggy Pinson Porter; a brother, Storey Porter; and sister, Louise House. He is survived by his sons Keith, Don and Brantley, three daughters-in-law, six grandchildren and numerous friends. The funeral was held on Jan. 2 at First Baptist Church in Jefferson, Ga.