Ugh. That's how it always goes. I was going to replace some 1950s cabinets. The floor around them had tiles, but once I pulled the cabinets you could see they tiled over two layers of vinyl/linoleum. Pull the floor out, had to remove a pipe to get some floor out, the inside of pipe was so clogged with rust and grease that the 1.5" hole was about 3/8" diameter. Pull all the galvanized pipes out, they were laying on the wiring for support. ??? Open the wall to move wiring, no insulation in the walls. Anyway 3 months later a cabinet change was a full down to the studs and subfloor kitchen reno