Question: I’m finishing a basement in an 80 year old house. I need to add a 30 foot partition wall to contain the mechanical area (oil tank, furnace, breaker panel etc.) and add a bathroom. I notice that the floors dip considerably toward the center of the home. If I use the floor to measure from, won’t all the doors along this wall be at different heights once they’re installed? What’s the best plan here?
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