On October 8, 2009 the Canadian International Trade Tribunal initiated an anti-dumping investigation on imports of faced rigid cellular polyurethane-modified polyisocyanurate thermal insulation board from the United States. The investigation was filed under subsection 34(2) of the Special Import Measures Act (SIMA), and it will be completed January 2010. The investigation was initiated at the request of IKO Industries Limited, a manufacturer of polyiso insulation board in Canada.
On December 22, 2009 the Canadian International Trade Tribunal determined that dumping of the subject good caused injury to the domestic industry. 
On January 7, 2010 the Canada Border Services Agency made a preliminary dumping determination on the subject good and established a provisional anti-dumping duty between 6.4% and 23.6% for five US exporters and 215% for all other US exporters. 
On May 12, 2010 The Canadian International Trade Tribunal found that the dumping of polyiso insulation board had not caused injury and was not threatening to cause injury to the domestic industry. Anti-dumping duties will therefore not be collected by the Canada Border Services Agency.