Barrault Pressacco wants to focus on insulation as a local resource. Beyond its thermal performance and the various labels that define it, insulation plays a fundamental role in the design and shape of buildings. The nature and origin, thickness and secondary properties, and ecosystem of the insulation are also taken into account. Therefore Barrault Pressaco wants to go beyond its sole insulating value. The research project consists of two complementary parts. The first part concerns practice. It proposes a succession of research, interviews and surveys in order to identify the available resources and application standards in Belgium. The result is an inventory of biobased materials that can be used as insulation today, such as: wood wool, hemp concrete, straw, raw earth. The relationship between territory and construction, between architecture and resources, is a necessity that imposes on buildings a new awareness of the origin of materials, by measuring the energy involved in their transport and transformation. The second part aims to raise awareness in the world of architecture of all these paradigms. Here, insulation is the starting point for architecture.