PeBBu domain 1 on life performance of construction materials and components is part of the EU financed thematic network on Performance based Building. Domain 1 addresses issues in a thematic field, where performance based building, service life, life performance and environmental declaration of products draw attention to each other. As can be seen in the recent development of international standards, service life and performance requirements gain a significant position as part of sustainability assertions of buildings and building products. Domain 1 aims to identify aspects of practical application of the ISO standards series 15686 on service life planning, as these standards provide the methodological basis to identify service life, and to provide the market with service life information. As service life per se relates to performance requirements and performance over time, and as sustainability in building construction related to fitness for purpose, performance based building fulfils a central hotspot of concern in relation to building sustainability. D1 addresses stakeholders' concerns when involving service life - both concerning the provision of information as the adaptation of information to a specific building design. Hence, concerns of manufacturers as well as designers and other relevant stakeholders are dealt with. Issues of concern for further R a. D as well as feedback and input to ongoing international standardisation, are identified by D1. With the direct link to the durability and service life research community and the involved standardisation bodies, the thematic network can play an important role in promoting performance based building.