Brock Aggregates is widely recognized and trusted for our high quality aggregates and superior customer service. We are one o ... f the leading suppliers in Southern Ontario for quality sand, stone, gravel, ¾ crush, crusher run limestone, and limestone screenings. Our supply capabilities include a wide range of aggregate materials for different facets of the construction and landscape industry including road building, foundations, drainage, specialty items and concrete aggregates. Our ability to handle any size project and timeline is unparalleled. read more