Social networks are seen to influence the use of health and social care services. In a secondary analysis of data from a longitudinal study of befriending of carers of people with dementia, the authors studied the relationship between network type and support from family/friends, voluntary sector befriending and residential/nursing care. Using Wenger's typology of social networks, finding suggest that the pattern of support use varies by differences in the structure of networks. It is recommended that questions on social networks should be widely incorporated into carers' assessments to help identify need for social support interventions and to enable the sensitive selection of appropriate types of carer support to be provided.