The upstairs bath was overdue to get some TLC. The time was right as we were able to pickup a new toilet , flooring (Cork) and some corner cabinets from the auctions for a real good price. The biggest problem was the floor was not level and sagged almost Three quarters of an inch to the door, this made the toilet so unlevel the seat had a hard time staying up when lifted. So this was a challenge to shim the floor as I started from behind the toilet, working towards the door. Some leftover laminate flooring and other thin wood got me to where it was pretty level. Never used cork flooring before but it cuts easy.
Some history the neighbor mentioned was back in the 80’s when they gutted the walls and ceilings they removed a wall section in the living room which is below the bathroom upstairs, that plus the house is over 200 years old the sag I think was because of this, I hope it’s done sagging.