Our Actions: Active Conservation, Research & Community Stewardship

1. Structural Masonry Consolidation & Traditional Lime Interventions

Historical buildings in alpine climates face extreme weathering: freeze-thaw expansion, torrential mountain runoff, and seismic vibrations. Our primary operational focus is the stabilization and conservation of the ancient stone masonry of Saint-Hilaire de Norgeat. Working under strict adherence to the International Charters of Venice and Krakow for the Conservation and Restoration of Monuments and Sites, all physical interventions are non-destructive, scientifically documented, and completely reversible.

Eradication of Incompatible Portland Cement Renders

During the mid-twentieth century, well-intentioned but technically disastrous repairs introduced rigid, impermeable Portland cement coatings to several sections of the exterior nave and bell-gable. Cement forms a vapor-tight skin that prevents moisture from escaping, driving water deeper into the metamorphic schist walls. This trapped humidity undergoes expansion during winter sub-zero temperatures, causing severe internal fracturing and pulverizing historic lime matrices.

Our specialized volunteer teams, supervised by professional conservation masons, meticulously chip away these deleterious cement crusts using hand chisels and pneumatic micro-scrapers, taking utmost care not to score the historical stone surfaces. Once the stone is exposed, the walls undergo thorough desalination and brushing with natural bristle brushes before being re-pointed with breathable natural hydraulic lime mortars (NHL 2 and NHL 3.5).

Formulation and Curing of Traditional Mortars

Mortar is not merely an adhesive; it is the sacrificial breathing joint of the building. Our technical committee formulates custom mortar blends tailored to the specific porosity of Norgeat schist. We combine regional hydraulic lime with washed river sands of graduated grain sizes (0 to 4 mm), incorporating crushed local limestone fines to achieve chromatic harmony with the ninth-century original work. The mortar is deeply packed into raked joints, tamped firmly to eliminate air voids, and cured under damp burlap sheets for up to twenty-eight days to ensure optimal carbonation without shrinkage fissures.

2. Roof Hydrology, Slate Maintenance & Perimeter Drainage

In high mountain architecture, water is the eternal adversary. The Church of Saint-Hilaire rests on a sloping terrain that receives heavy seasonal runoff from the heights of the Pijol ridge. Without proper management, surface water saturates the foundation footings, causing capillary rise that damages historical interior wall plasters.

Our association has undertaken the systematic rehabilitation of the ancestral dry-stone perimeter drainage channels (calades et caniveaux d'évacuation). By excavating silted ditches and lining them with graded river gravel and dry schist slabs, we redirect surface runoff safely away from the church's eastern apse. Simultaneously, our seasonal roof inspection campaigns identify slipped Pyrenean slates (lauzes), replacing broken fasteners with durable copper hooks and repairing lead flashing along the bell-gable junction to ensure zero rainwater infiltration into the medieval timber trusses.

3. Guided Architectural Visits & Public Pedagogical Mediation

Conservation without civic sharing is incomplete. A monument derives its true life from the appreciation and affection of the community. To make the rich history of Saint-Hilaire de Norgeat accessible to the widest possible audience, our association organizes regular, free guided cultural tours throughout the spring, summer, and autumn months.

Led by knowledgeable volunteer historians and certified mountain guides, these mediation sessions explore:

• The Romanesque Architectural Grammar: Splayed lancet windows, semicircular apse geometries, load-bearing barrel vaults, and the defensive bell-gable architecture typical of medieval Upper Ariège.
• Geology and Mountain Stonecraft: Identifying local rock types—schist, gneiss, and limestone—and understanding how medieval builders adapted their techniques to the harsh realities of the Pyrenean climate.
• The Social and Pastoral Life of Norgeat: Uncovering how the church served as the spiritual, civil, and defensive refuge for shepherds, iron miners, and terraced farmers over nine centuries of communal existence.
• Hands-On Conservation Demonstrations: Allowing visitors to observe live mortar slaking, stone dressing, and timber joinery demonstrations, demystifying the art and science of historical building preservation.

In strict keeping with our non-profit statutes, all guided tours are completely free of charge. We accept no commercial bookings, ensuring that heritage remains a shared civic commons accessible to all citizens regardless of financial means.

4. Archival Investigations, Cadastral Studies & Oral Memory Collection

Physical restoration must always be illuminated by historical scholarship. Our research collective works in close partnership with the Departmental Archives of Ariège (Archives Départementales de l'Ariège) in Foix, examining centuries of uncatalogued documentation:

• Parish Terriers and Land Registers: Transcribing seventeenth- and eighteenth-century deeds that define parish boundaries, ecclesiastical rights, and communal land commons in Norgeat and the Vicdessos valley.
• Pastoral Visitations (Procès-Verbaux de Visites Pastorales): Analyzing reports filed by the Bishops of Pamiers dating from 1580 to 1785, which record structural defects, church furnishings, relic inventories, and spiritual life in the hamlet.
• Oral History and Elder Testimonies: Conducting audio-recorded interviews with octogenarian residents of Norgeat, documenting memories of twentieth-century religious festivals, bell-ringing codes for mountain storms, and ancestral agricultural rituals associated with Saint-Hilaire.

All collected historical documents, high-resolution photographic scans, and transcribed manuscripts are made freely available to researchers, university students, and the public through our open-access Resource Center.

Scientific Diagnostic Protocols & Non-Destructive Architectural Testing

Before any physical hammer or chisel touches a stone of Saint-Hilaire de Norgeat, a rigorous scientific evaluation is conducted. Our association adheres to the principle that diagnosis must precede intervention. In cooperation with consulting conservation architects and engineers, we deploy modern non-destructive testing (NDT) technologies adapted specifically to fragile ancient masonry:

1. High-Density Photogrammetric 3D Surveying

Using calibrated digital cameras and drone-assisted photogrammetry, our technical volunteers have constructed a millimeter-accurate three-dimensional spatial model of the entire church envelope. This digital twin enables us to measure wall inclinations, detect minute vault deflections, map individual stone displacements, and maintain an authoritative baseline to evaluate structural settlement over multi-year observation cycles.

2. Thermal Imaging & Internal Moisture Mapping

Water infiltration often travels invisibly through the core of multi-leaf stone walls before manifesting on interior plaster surfaces. By deploying infrared thermography during seasonal temperature transitions, our diagnostics team detects concealed cold anomalies that correspond to trapped water reservoirs, localized voids, and condensation planes within the thick schist masonry.

3. Continuous Hygrometric & Temperature Micro-Logging

Interior environmental stability is critical for the survival of historic wooden furnishings and lime plasters. Autonomous electronic sensors placed at discreet locations throughout the nave record relative humidity and ambient temperature at fifteen-minute intervals. The gathered data informs our passive ventilation strategy, ensuring optimal airflow without inducing thermal shocks that could accelerate condensation or frost crystallization.

5. Environmental Care of Parish Grounds & Dry-Stone Biodiversity

The perimeter of Saint-Hilaire is an integral component of the historic monument. Overgrown brambles, invasive ivy, and unmanaged root systems can penetrate stone foundations, dislodging mortar and causing irreversible structural displacement. Our monthly site stewardship days mobilize volunteers to care for the grounds:

• Gentle Vegetation Removal: Clearing destructive woody vegetation from wall bases using hand saws and pruning shears, without applying chemical biocides or glyphosate.
• Dry-Stone Wall Rebuilding: Restoring the collapsed retaining walls that frame the parish path, utilizing traditional vernacular dry-stone techniques that require no cement and provide critical habitat for alpine lizards, solitary bees, and mosses.
• Bat Habitat Protection: Maintaining seasonal quiet protocols during the summer breeding season of the protected Lesser Horseshoe Bats inhabiting the church belfry, coordinating all interventions with regional naturalist conservancies.