We recently put down a new mat; right on top of the old one. We didn’t even the remove the old canvas. But we did extent the mat from wall to wall.
What a challenge we encountered at 8:30 in the morning. The new mat material is 2 inches thick, 6 feet wide and 42 feet long and covered with carpet material. In fact, it is a gymnastics mat. It came in 4 tightly rolled bundles. We knew when ordered that they would not fit through the door so we were four people strong. (guest what, not enough people) We had to unroll each mat and snake it through the door, up the stairs to the second floor, around the corner, down the hall, through the dojo door then lay it down with chairs on each end for several hours to get it to lay flat. Consider that process times four. Two hours later we were done the bull work.
5pm that afternoon we started the process of fitting the 4 pieces together, cutting them to length and filling in the corners and odd nooks. The joints are covered and held together with 5 inch wide velcro strips and fit very nice. Just about the whole dojo joined together to put it down. Nice work, everybody.