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Concrete can take years to fully settle, but interior concrete floors are mostly settled after a year. Shifting and settling can occur throughout your home’s life, but most major settling happens the first few years after the concrete is poured. It’s not uncommon for minor cracks to appear in concrete floors over time—check with a concrete pro to ensure new cracks don’t indicate a structural issue in your home.

Yes, baking soda and vinegar can remove rust from concrete. Vinegar is acidic and can remove rust stains from concrete on its own. Adding baking soda may increase abrasiveness, which could help loosen some of the stain even more when scrubbing the stain. However, a stiff-bristled brush can do the same. 

Concrete should be at least 4 inches thick for steps. This thickness boosts stability and prevents cracking and deterioration. After you’ve built your forms out of wood, fill the void with a sand or gravel base for concrete. Use an all-purpose concrete mix to form your steps. After pouring your concrete steps, be sure to screed and float the concrete. 

Concrete floors can last 50 to 75 years or more when properly sealed and maintained. Some concrete finishes, like polished concrete, will need to be refinished periodically—depending on the finish and foot traffic, you may need to refinish or reseal your concrete floors every five to 20 years. Keeping the concrete properly sealed will prevent damage and extend the lifespan of your concrete floors.