I am doing a loft conversion and have created a new roof space that is 11m x 6.5m. This I am dividing up into 3 bedrooms and 2 bathrooms using stud walls. Can anyone give me a idea how to estimate the work to board, tape and fill joints. The wall space is approximately 181 square meters - 5 doors. Not forgetting 80m^2 of ceiling to board as well.
I have been using a carpenter for the main work but his plastering quote seems a little expensive. I don't want to waste plasterers time by getting quotes when I intend use the same carpenter. I just want to get the feeling that I am paying a fair price.