I don't know if that title is the best way to phrase the question.
It is winter(ish) now, and I swear the hot water just doesn't last as long as it does in, say, September. The water heater tank is insulated with the standard factory insulation. The house is heated, of course. But I know the concrete slab is colder now than it was a couple of months ago.
I'm wondering about building a short wood platform (pressure treated 2x4's, 3/4" plywood) to put the water heater on. But I'm not crazy about taking the time to drain the tank and move it, and cut and resolder the pipes. I mean, I certainly can, I just don't know if it will end up being worth the effort.
Any thoughts? Does anybody think the water heater is losing substantial heat through the bottom into that big concrete heatsink it's sitting on?