<div dir="ltr"> Hi 1. Thermal properties: I have a list of building materials used for the building I am trying to model. Unfortunately, none of these materials are listed in the ESP-r library. Where can I find the relevant properties of those materials which ESP-r needs to run a simulation? Here is the list of the materials. _________________________________________ 1 : 1.67 : 2.84 reinforced concrete (C:S:A) 1:4 cement mortar plaster 1:4 cement sand plaster vitrified tiles typical values for fiberglass reinforced plastic typical values for ply typical values for brickbat _________________________________________ 2. Optical properties The library doesn't include layers of paint. I intend to create a new material by assigning the following properties: conductivity: infinite // is this allowed density: 0 // is this allowed specific heat: same as that of underlying plaster But how do I estimate IR emissivity and solar absorptivity? The internal paint is a white and external is grey. Is there an easy way to measure it or are there typical values for paints depending on the colour? Where do I find this data? It also occurred to me that the paint layer, being very thin, could be modelled as a transparent construction because my guess is that it does let light pass through because of how thin it is. However, for this I will need to find 8 optical properties of paint (3 types of transmittances, 4 types of reflectences and colour rendering). I understand that this is more accurate but if anybody tells me that an opaque material type paint won't lead to major inaccuracies, I will gladly work with an opaque paint. Where do I find the detailed optical data of 'white emulsion paint' and 'grey emulsion paint’? Thanks, Satya </div>