It is possible to replace a door without replacing the frame. However, most people choose to replace both their door and frame at the same time, as this is likely to make your home security and energy efficiency better, particularly if your existing front door is very old or the frame is distorted.
Canonbie
Canonbie (population 390) is a tiny village in Dumfriesshire within the regional authority area of Dumfries and also Galloway in Scotland, 6 miles southern of Langholm and two miles north of the Anglo-Scottish boundary. It gets on the A7 road from Carlisle to Edinburgh, and the River Esk flows with it. There are frequent recommendations in older records to it as Canobie. Canonbie was immortalised in a rhyme by Sir Walter Scott entitled Marmion. A renowned area covers the ventures of young Lochinvar. Having actually taken the hand of the bride-to-be of Netherby Hall, about 3 miles south of Canonbie, the rushing knight is chased after with Canonbie, but makes great his escape.