The Ontario Association of Demolition Contractors (OADC) is a powerful voice in the demolition and abatement industry. Since 1976, we have represented member companies of all sizes who have signed the Demolition Collective Agreement with the Labourers'​ International Union of North America (LiUNA). OADC member companies are tier-one providers of demolition and abatement services in the construction sector, consistently chosen to work on projects that demand highly trained, safety aware industry professionals. Our Mission: OADC supports the interests of our members. We advocate for clear, fair and functional legislation which develops, maintains and sustains a positive and proactive relationship with the Labourers' International Union of North America and the Ontario Provincial District Council.Our Vision: OADC members adhere to the highest industry standards and are preferred and valued on all demolition and abatement projects.OADC. Associate With The Best.