Hello, You didn't mention when your attic is hot. Is it hot in the Summer and cold in the Winter? If your intention is to use it your attic as storage then you actually want your attic to be cold in the Winter. This helps prevent the snow from melting off your roof and causing ice dams, which in turn create moisture issues. To accomplish this I recommend air sealing with a two part foam and insulating the attic floor with blown in cellulose. Make sure to use propa vents so the soffets don't fill up with insulation and your attic can breathe. (The soffets are the intake and the gable vents are your out take) If your intended use for the attic is living space, you will want to insulate the slope of the roof. This creates the thermal barrier above the living space and keeps the heat where it's supposed to be. Good luck with your project.