We have an attached garage with a side entrance to it from our hall way. The internal door between the house and garage is just a standard 30mm thin veneered/vented door and also has a cat flap. Needless to say we're getting a bit of a draught and having recently spent a small fortune on new windows, doors, wall & loft insulation I am now looking to insulate the garage. The garage door is a up and over type and has a steel cable operated handle that runs across the back of the door. There's an approx. 1 inch gap on all sides of the door. What do people use to insulate and draught proof garage doors.