New answers tagged self-leveling-concrete
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Comfort is generally better with a wooden subfloor, if you have the room for a wooden subfloor. That also allows adding insulation to reduce the heating/air conditioning load (which may be minimal from the floor, given your location.)
Plenty of old houses have floors that slope a lot worse than 1.5" in 20 ft (0.67% if I got the math right) and they work ...
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