Dufferin Aggregates is a leading supplier of aggregates for the construction industry in Ontario. We operate more than 20 sites, including quarries, sand pits and distribution yards to supply crushed stone, sand and gravel, recycled crushed concrete as well as recycled crushed asphalt, for the commercial, industrial, residential and civil engineering sector. We are proud to have supplied high quality aggregate for many infrastructure projects in the province including Highway 407 and the Toronto subway system, as well as a variety of smaller projects for local homeowners.