Expansive clays. Known to Trinidadians as "Sappotee" clays are notorious for causing much distress to private domestic and commercial structures built in the south and central regions of the island. To counteract this phenomenon geotechnical engineers would typically recommend expensive, deep foundations even if the building is classified as a light-weight structure. The construction sector was booming and the government housing sector was in overdrive with its "Affordable Homes For All" programme. The construction of these simple, light-weight structures on expansive clays was plagued with...