LOW IMPACT HIGH-PERFORMANCE MATERIALS FOR SUSTAINABLE RESTORATION OF HISTORICAL MASONRY BUILDINGS

Introduction

The conservation of historic buildings requires a careful balance between structural safety, material compatibility, environmental responsibility, and the preservation of cultural significance. In many heritage interventions, the use of incompatible repair materials has contributed to accelerated deterioration, reduced vapor permeability, and loss of authenticity. In this context, developing and using low-impact, high-performance construction materials has become an important direction for sustainable restoration practice.

This paper examines sustainable intervention strategies for historic masonry in built heritage.

Methods

This study adopts a multi-source framework. It combines historical, architectural, and structural analyses of the selected heritage assets. It also reviews restoration interventions from different periods and assesses the effects of previous measures. Case studies were selected using clear inclusion and exclusion criteria. The sample is limited to historic monuments in Eastern Europe.

The Methods now list the interventions considered: cleaning (mechanical and chemical), surface protection (sacrificial and breathable coatings), mortar and plaster consolidation (lime-based repairs), and minimally invasive structural stabilisation.

Results

The analysis shows that effective restoration strategies depend on the selection of materials that combine technical performance with minimal physical and environmental impact. Lime-based systems, breathable repair materials, and minimally invasive technologies stand out as suitable options for historic masonry. These materials improve long-term performance while avoiding the damage caused by rigid or incompatible interventions. Together, they offer a more sustainable approach to restoration that protects the original fabric.

The Results briefly explain which material families are suited to each intervention type (for example, lime-based mortars for consolidation and breathable sacrificial coatings for surface protection).

Conclusions

Sustainable heritage restoration isn’t just about using greener materials. It’s a methodology that avoids unnecessary replacement, keeps the original substance in place, and supports long-term conservation. When material choices are driven by compatibility and real performance, restoration becomes more resilient and more environmentally responsible.