As the title says, does anyone have any suggestions on where to purchase 3.5 thick fiberglass insulation that is 48 wide x 100ft long? Its difficult to find a supplier that list their prices online. So I was hoping that instead of waiting until Monday and calling a dozen or more companies to check their pricing I would instead ask you guys. My building is a fairly large red iron type building with 20ft ceilings that are pitched. Same with the walls. I heat and cool my building year round but I am more so worried about being able to cool it in the summertime than I am about heating in the winter.