7.3 Module B2 – Maintenance. Written by Anh-Migrate on 21. October 2012. Posted in Existing buildings, New buildings. 7.3 Module B2 – Maintenance. B-03 Maintenance with screening LCA. B-04 Maintenance with simplified LCA. B-05 Maintenance with complete LCA. Lifecycle stage: B (all modules), Lifecycle stage: B2 Previous Next