Includes abstract. / Includes bibliographical references (leaves 202-221). / The training of craftsmen in Kenya is the responsibility of their traditional employer the contractor. However, over the last 20 years, the contractors’ motivation to train has been eroded by increased casualisation. Concurrently, there was growth of the informal procurement system propagated by private sector clients, who have no incentive to train because they are ad hoc consumers of construction services. Together these phenomena led to the collapse of the formal craft training and growth of informal skilling. Currently however, there is a lack of knowledge and understanding of the nature of informal craft training. The intent of this research was to redress this by identifying the types of skills informally employed craftsmen are acquiring, how these skills are acquired and how training delivery can be enhanced. The hypotheses of the research were that the skills and skilling methods in the informal sector do not differ significantly from those in the formal sector and that the nature of training in the informal construction sector is clearly understood.