Is it possible to add to existing carpet when extending a room?

Hello, If you have some carpet left over from when it was originally fitted or are able to get more of the same carpet seaming a piece in wouldn't be a problem for most fitters. Very few people will guarantee that a join will be seamed so well that it'd be invisible though as some carpets just join better than others. Also your carpet that's laid currently will be more worn than a new piece you install. A fitter will have to ensure the pile is running in the same directions to deliver the best possible results. Use a heat seaming iron with gold seaming tape, have patience and heat swam rolling tool to bring the pile together afterwards. Holmes Carpets