@lakemartinconcrete
Strategic placement of expansion joints in concrete slab foundations prevents random cracking due to thermal movement and shrinkage. In Lake Martin’s warm climate, planners typically locate joints at intervals no greater than twice the slab’s thickness (in inches) both lengthwise and widthwise. Joints should align with planned control patterns or decorative features, and extend through the full slab depth to isolate movements. Nighttime pours require shorter joints to accommodate faster initial cooling, while interior slabs in conditioned spaces may space joints further apart. Lake Martin Concrete Company’s engineers map joint locations before grading and formwork, ensuring that each foundation slab remains crack‐controlled and structurally sound for decades.
