There were several categories of mason, differentiated by the tasks they performed. The main division was between the cutters, or freemasons, who carved the stones to shape, and the layers, or roughmasons, who placed them in position (...)
The arrival of the workers at a building site necessitated the provision of workshops and, at the more remote sites, living accommodations as well. These were usually temporary buildings made from timber. The masons' lodge was essentially a workshop in which the freemasons prepared fine-quality masonry, and where their tools were stored; they might also take their meal breaks there. A building contract of 1421/22 for the construction of a bridge over the River Swale at Catterick in Yorkshire stipulates that the client should provide a wooden lodge at the site for the masons to work in. Occasionally, the lodge is depicted in illustrations of building sites as an unremarkable structure that could be use to allow masons to continue working during periods of inclement weather.
Malcolm Hislop, How to Build a Cathedral.