This is the supplementary information related to the manuscript - "ame product, different score: how methodological differences affect EPD results" . The purpose of this study to analyse the causes for inconsistency and the consequences in terms of difference in the results across the Life Cycle Assessment (LCA) models underlying the EPDs. The supplementary information consists of three files: SI 1 - Details on the choice of Nordic programme operators who publish product category rules and product specific rules. This documents further includes the details of the life inventory developed to perform the LCA of a triple glazed window using the rule sets published by different programme operators. SI 2 - Life cycle inventory data for all scenarios considered in this study in machine readable format SI 3 - Life cycle impact assessment for all scenarios using EN 15804 + A2 Method V1.02 / EF 3.0 normalization and weighting set.