Is it worth the extra money for an insulated garage door?

For an attached garage, an insulated garage door is almost always worth the extra 200 to 600 dollars. The benefits go well beyond energy savings: the door is noticeably quieter when it opens and closes, it dampens street noise inside the garage, it stiffens the panels so they resist denting, and it keeps any room above or next to the garage closer to your home's set temperature. Polyurethane-injected doors with R-12 or higher deliver the strongest gain. For a detached garage that is unheated and not used as a workshop, the energy savings will not pay back, but the durability and quieter operation still make it a reasonable upgrade. For a heated workshop or an apartment over the garage, it is a clear yes.