The rehabilitation of social housing quarters is done with the purpose to answer three central questions: (1) to solve the existing anomalies that are often caused by rain water infiltrations through the vertical's building envelope and also through roof, condensation caused by the lack of insulation and poor existent ventilation and existing cracks in building's facades; (2) to improve thermal comfort and increase energy efficiency of the buildings; (3) to increase the satisfaction and self-esteem of the residents promoting a modern and also high quality architectural intervention at social housing quarters. This study will describe the executed solutions for the rehabilitation of this three social housing quarters, three of the biggest social quarters of the Oporto region, each one with a different intervention in the building envelope.