Plot: Tom Silva tests out the old-fashioned v-shaped gutter he made for the front porch, then takes us on a tour of the house, explaining his preparations for the spray-in insulation. Most of these are like for any other insulation job, like his use of vent chutes to keep the roof cool, though he did have to cover the windows to protect them from overspray and put up one side of the interior walls for those rooms he wants insulated for sound