Pouring self-leveling concrete thicker than the manufacturer's specified maximum limit for a single application can cause severe structural issues, including excessive internal heat generation during curing, major shrinkage cracking, and structural delamination. When poured too thick without aggregate reinforcement, the massive bulk of cementitious material retains heat unevenly, leading to internal stress fractures and weakening of the entire layer. If a floor requires deep leveling exceeding standard limits, installers must either pour the material in multiple staged lifts with proper priming between layers or mix the compound with approved gravel aggregate.
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