Weight of countertops depends on whether you want our traditional wet-cast, or GFRC products. Both options are well within load capacities for standard North American residential construction. Keep in mind, if your cabinets are off-the-shelf store-bought modular, single-wall, or pressboard cabinets, you might require a few reinforcements. This ensures the weight is transferred correctly from your counter to the floor. There is no need for additional reinforcement for quality-made cabinets or overhangs up to 12”. Molded Stone Studio is happy to answer any questions during the initial on-site measure.