The environmental impact of fossil fuels is promoting the regulation of the energy consumption at least in the developed countries. Close to 40 % of the energy consumption and also the 36% of CO2 emissions in Europe in 2002 were due to the residential and tertiary sectors and the EU directive 2010/31/UE establishes in a 20% the reduction in the green house gases emissions. In the USA, the energy consumption in buildings is the 30% of the total and the situation is similar. The use of the solar energy could reduce the energy demand in the residential sector but this energy is intermittent and its exploitation requires to storage it. An alternative is the use of microencapsulated phase change materials (PCMs) which are able to storage the solar energy and release it when external temperature goes down. Several authors have applied these PCMs in rigid polyurethane (RPU) foams, widely used as insulating materials, in order to improve their thermoregulating capacity. These works, revealed that the nature of the microcapsules determine the final foam properties. In this work, RPU foams were synthesized incorporating up to 18 wt% of different thermoregulating microcapsules types with different shell material consisting of low density polyethylene and EVA,, polystyrene or poly(methyl methacrylate). The type of microcapsules and their content affected the final foam height, which decreased with the content and particle size. However, the foam rising curve shape was independent on the microcapsules type and was successfully predicted by a model of reaction curve of 4 tanks in series. TES capacity of PU foams was improved in all cases, with values close to those reported in literature (16 J/g). Nevertheless, the highest particle size of the microcapsules from PS and the agglomeration of the ones from PMMA led to the strut rupture, damaging the mechanical properties; being the ones from LDPE and EVA the only ones that preserve the foam structure and mechanical properties.