The different kinds of insulation in garage doors is polystyrene, polyurethane, and styrofoam backing. The three different insulations have different R values that can increase keeping the weather out with a higher R value.
Polyurethane: a liquid insulation that is inserted in the manufacturing process that solidifies. Polyurethane is similar to the spray foam sprayed into walls for insulation. The R value of polyurethane ranges from 15-25. Polyurethane garage doors are more expensive than polystyrene garage doors.
Polystyrene: a styrofoam material sandwiched in between two pieces of steel. Polystyrene is how garage doors have been made for many years.
Styrofoam Backing: a styrofoam that is held onto the back of a garage door with pressure.
At Grove City Garage Door Inc., we recommend the polystyrene or the polyurethane insulated garage doors. These two insulations have the best R value for the Ohio weather, they can withstand wind load, and they are also harder to dent if you run into one.
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