IKO Industries, Ltd. (Canroof and GH International) - manufacturer of asphalt roofing products such as organic & fiberglass mat shingles, waterproofing systems, caulks & sealants, roof primers & paints, patching compounds, adhesives, insulation and tile repair systems. Your company was established in 1951 and currently operates 21 manufacturing plants sales offices throughout the US, Canada and Europe.