Improving the energy-efficiency of historic masonry buildings. A case study: A minor centre in the Abruzzo region, Italy

• We classify the historic masonry types in a minor centre.
• We realize investigation in situ aimed at identifying the U-value of masonries.
• We identify technological dry and non-dry system solutions.
• We evaluate for each case the improvement of the energy behaviour.
• The comparison considers the transformability level of the masonry and the cost.

The high cost of energy, along with an urgent need to reduce global worming causing emissions, has contributed to the rethinking of contemporary design and building techniques. It also brought to the forefront the need to increase the energy performance of heritage buildings. Italy's Abruzzo region has many small towns with old structures. The earthquake that struck the area in 2009 caused significant destruction to many communities and buildings. The need to rebuild led to a series of interventions aiming not only at reconstructing, but also at increasing the structure's energy performance. This paper describes a study of Abruzzo's historic buildings and proposes interventions to improve their energy-efficiency. The authors developed a methodology based on an on-site investigation and the study of compatible possible solutions. The first phase includes a series of thermal measurements, using both indirect and qualitative methods such as thermography and direct and quantitative methods. With the information gathered, it was possible to verify the energy performance of each solution based on the level of invasiveness of the proposed intervention. The proposed methodology serves as a guide to recovery design, using a “case by case” approach to identify the method of intervention in each value context.