As a seasoned concrete specialist operating in Toronto, I can delineate that our offerings are bifurcated into two primary services: the installation of new concrete floors and the replacement of existing ones. The fundamental distinction lies at the outset of the replacement process, which necessitates the demolition of the old concrete floor followed by meticulous excavation of the underlying soil to an approximate depth of 8 to 9 inches. This preparation stage is labor-intensive and requires both time and financial commitment. Once this initial phase is complete, the replacement service aligns with that of a new installation, encompassing the installation of gravel bedding, implementing waterproofing measures, setting up drainage systems, laying down insulation, reinforcing the structure, and culminating with the pouring of the concrete slab.