The video shows the advantages of getting your roof insulated. At 10am on a frosty moring, you can clearly see the home on the left which has recently had their roof insulated, still has the frost on the majority of their roof. While on the adjoining house's roof, the frost is gone. This basically means that in the house on the right, the heat is escaping through their roof. For more information of roof insulation, visit the link below.