An energy refurbishment of an urban commercial building should combine improvements to the building envelope with the organisation of entrances, deliveries and the operation of building services. Sandwich panels and PIR insulation may be used in different parts of the renovation, but each requires separate selection. The new wall must fit the existing supports and openings, and the roof layers must suit the drainage and the way the roof is used. On Sandwich-panel.pl we discuss how to prepare such a project, from surveying the building to verifying the results. We do not assume a single solution for every retail pavilion or workshop. The scope of works should follow from the condition of the building and the needs of the tenants; opening gates, ventilation and operating hours can significantly affect the energy performance.