Screed and ground beams, or aggregate and OSB tiles - which is the best method of levelling?
After removing the old screed on the first floor of a residential building I've got one room 50-80 mm lower and another 100-130mm lower compared to the level of the hall. Can the whole space be filled in with aggregate (e.g. ceramsite) and covered with OSB tiles, on which Barlinek floorboards or a traditional floor would be laid? Wouldn't putting in heavy furniture cause the floor to collapse? Or would a better solution be to make levelling screed and lay ground beams, and then OSB tiles on top of them?
The second solution is definitely better.
