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.