The paper describes novel strategies towards coreless filament winding of geometrically complex fibre reinforced building components. The research focuses on winding processes that reduce the need for formwork, allowing for the fabrication of individual one-off components made of glass and carbon fibre rovings. The component geometry and layout of the rovings is adapted to the structural loading of the system. Through the development of a modular system, the dimension of the resulting structure is not limited by the robotic fabrication set-up, which demonstrates how the coreless winding method is applicable in large scale building implementations. The paper presents two prototypes produced by modular coreless winding: First, the ICD/ITKE Research Pavilion 2013-14 investigated and demonstrated the geometric variability of the system. Second, the Elytra Filament Pavilion at the Victoria and Albert Museum in London in 2016 extended this approach towards a fully functioning roof system of significant scale. The Elytra Filament Pavilion is additionally equipped with a fibre optic monitoring system, allowing for on-line sensing of strain and temperature and illustrating the potential of multi-functional fibre systems.