Exterior garage door

Vlewis2014

Hi everyone,
I have a garage connected to main house which gets a bit cold. Long term we'd like to get it converted and properly insulated, but financially that's not an option.
It is currently a utility / storage room so not used for car, but roller door is still in place. We've insulated the interior, but wondering if it is worth it/ possible to do the external side of garage door? Maybe with caulk? Thanks

*j*

You'd be better off concentrating on insulating from the inside, so the outside still looks 'normal'. Well sealed polythene sheet will stop draughts, and is easier to remove than caulk.

Remember that the garage will still be close to outside temperature no matter how much insulation you apply, unless you introduce some additional heat to the space.