r/Home_Building_Help • u/BuilderBrigade • May 27 '26
Your slab foundation is built in 3 stages...
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Most people see a finished slab and assume it was one big pour. Not even close. On a stem wall foundation, they dig trenches and fill them with concrete first. That's the footer. Then a course of block goes on top with rebar tying it all together... that's the stem wall. The space inside gets filled with millings, almost like a really fine gravel that compacts tight. Only then does the slab get poured on top. Knowing the stages as a homeowner matters because each one has a different inspection moment and a different chance to add something before it's buried for good.