Lafarge North America is at the foundation of buildings, roads, and bridges across US and Canada. One of North America's largest building materials manufacturers, the company operates around 600 concrete plants, aggregate plants, and cement plants in the US and Canada (through Lafarge Canada). Its products include asphalt, aggregates, gypsum wallboard, ready-mixed concrete, and concrete pipes and blocks. The products are used to build commercial, residential, transportation, public, and utilities projects. Lafarge North America is part of global building conglomerate Lafarge Group, based in France. It accounts for about 20% of its parent's sales.