The way in which the maturity sensors are placed determines their number required for a particular monolithic building skeleton. Previous studies scarcely address this aspect, providing only logical assumptions. Therefore, this study proposes an alternative placement strategy for maturity sensors based on transitional boundaries of concrete curing temperature distribution. The transitional boundaries may be determined using the heat map representation of temperature distribution, where the unknown values are computed by the Inverse Distance Weighting method. Based on the experimentally poured concrete slab and randomly embedded maturity sensors revealed that the transitional boundaries form elliptical shapes. The temperature distributions along the largest diameter of ellipses were plot on a single graph, which created regular and reverse parabolas. As a result, the distance between the closest opposite intersections of the parabolas is assumed as the maximum acceptable step to set the maturity sensors. The proposed placement strategy may be applicable for the sensors that measure various continuous phenomena, for example the relative humidity.