Supplementary data for: N.F. Jensen, T.R. Odgaard, S.P. Bjarløv, B. Andersen, C. Rode, E.B. Møller, 2020, "Hygrothermal assessment of diffusion open insulation systems for interior retrofitting of solid masonry walls", Building and Environment Vol 182, pp. 107011 The datasets comprises: 1) Measurement data2) Mould-growth modelling results (VTT, MRD and WUFI-Bio)3) Mycometer on-site test results4) Photo documentation from the on-site mould identification5) pH measurements for the internal render and adhesive mortars in the interface between masonry wall and insulation systems. 6) Wind driven rain measurements