The principal problem of residential building envelopes in Malta is that there was never a deliberate effort to use insulation in cavity walls, be it for thermal or acoustic isolation. However there was always a concern for moisture isolation by the use of cavity walls against rain penetrating the external porous limestone skin and using a damproof course to isolate the lower damp foundations from the rest of the building. This paper looks at the various technical improvements that could be implemented to the building envelope that could achieve improved energy efficiency as well as a notable upgraded comfort level for a better quality of life.