The invention discloses a belt assembly for moving a web from a press section of a paper- or board making machine to a dryer section of the machine or a method of board section, which comprises a combination of at least two of a first press roll (11) adapted to be arranged at the press section, a first dryer cylinder (31) adapted to be arranged at the dryer section, and a stretcher/guiding roll (51), which is arranged between or within the press section and/or the dryer section. A heat conductive metal belt that forms an endless loop and that is impervious to fluids goes over the first press roll and/or the first dryer cylinder and/or the stretcher/guiding roll in order to take over a web at the press section and to move the web to the dryer section.