If you are considering investing in a garage door with insulation – whether it is to save you electricity or to keep your garage warm on the inside, it is always worth it to spend at least 15% extra to upgrade from the usual extruded polystyrene insulation to polyurethane insulation.
The effectiveness of a garage door’s insulation lies in its R-vale, and the bigger this number, the better the insulation is – and the more you save electricity, and thus money for you. Insulation is a good bet to make in general, because it is convenient to have in the cold winter months, and it is a good way to save money.
~ VB Garage Doors – Garage Doors Southampton