I get that some foundations do have sinking issues, but how does having a foundation help? If the foundation is poured and solidifies, what stops the weight of the house from immediately sinking/tilting the foundation?
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to explain it as simple as possible, theres 2 big reasons it works.
1. Poke your palm with one finger, now try it with your whole hand. One finger feels like a lot more pressure for the same push.
Houses sit on foundations for that reason, the foundation spreads out the weight of the house, where it would normally just sit on the walls. A bigger area is better than a smaller area to not sink into the ground.
2. Have you ever dug in sand at the beach? if you dig enough you get water/wet sand, yes? Much like that, if you dig into the dirt, or whatever the ground is made of where your house is, youll reach a depth where different things show up. A foundation lets you go below those areas to a layer where the weight of the house can be supported.
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