There is a need for new imaginaries of care and social health for people living with dementia at home. Day programmes are one solution for care in the community that requires further theorisation to ensure an empirical base that is useful for guiding policy. In this article we contribute to the theorising of day programmes by using an ethnographic case study of one woman living with dementia at home using a day programme. Data were collected through observations, interviews and artefact analysis. Peg, whose case story is central in this article, was observed over a period of nine months for a total of 61 hours at the day programme, as well as 16 hours of observation at her home and during two community outings. We use a material semiotic approach to thinking about the day programme as a health ‘technology in practice’ to challenge the taken-for-granted ideas of day programmes as neutral, stable, bounded spaces. The case story of Peg is illustrative of how a day programme and its scripts come into relation with an arrangement of family care and life at home with dementia. At times the configuration of this arrangement works to provide a sort of stabilising distribution of care and space to allow Peg and her family to go on in the day-to-day life with dementia. At other times the arrangement creates limits to the care made possible. We argue that how we conceptualise and study day programmes and their relations to home and the broader care infrastructure matters to the possibilities of care they can enact.