Ah, the joys of slab foundations. Got one of those, myself. That's a lot of work, but if the pipes in the slab are bad, it's probably the right answer. Hope it happens quickly for y'all.The water heaters are fine. Worse, in its own way- we had multiple breaks in the hot water pipes under our foundation. For the second time in 8 years.
The floor was over 105degF in some spots.
The first time, we just had plumbers drill straight down and replace the broken pipes. Had to replace about 80% of the first floor’s tile and wood flooring.
This time, we’re opting to have the entire house’s hot AND cold water redone so it runs through the ceiling & walls.