Our Conservation Programs & Community Field Initiatives
Direct hands-on stewardship restoring the physical fabric of Senantes through traditional lime masonry, rural hydrological care, historical archival study, and public education.
Structured Practical Stewardship for the Public Interest
Our association divides its annual operational field interventions into four core technical programs, ensuring disciplined project management, rigorous safety standards, and sustainable conservation outcomes.
Methodology Rooted in Traditional Craft
Unlike commercial restoration firms driven by rapid turnaround and synthetic materials, SAUVEGARDE DU PATRIMOINE DE SENANTES operates on an ethos of patient, meticulous craftsmanship. We train community volunteers in centuries-old building techniques that work in harmony with the natural physics of historic masonry.
Every program is structured around seasonal cycles:
- Spring & Summer (May to September): Exterior masonry repointing, stone replacement, washhouse timber repairs, and outdoor public discovery walks.
- Autumn (October to November): Waterway vegetation management, drainage cleaning, and pre-winter site weatherproofing.
- Winter (December to March): Indoor archival research, document transcription, material procurement, and school classroom seminars.
As mandated across all our institutional activities: "All membership fees and dues are fully reinvested in the association's public interest missions." No private fees are ever charged for public participation in our restoration days.
Monumental Masonry & Stonework Consolidation
Restoring stability and weather resilience to the historic limestone facades, perimeter churchyard walls, and carved stone portals of Senantes.
Technical Scope & Materials: This program addresses the primary structural challenges facing our village's oldest stone buildings: mortar wash-out, freeze-thaw spalling, and historical cement patching. Masons and volunteers carefully rake out defective modern Portland cements using non-impact hand chisels. Facades are washed with low-pressure demineralized water and repointed using authentic natural hydraulic lime (NHL 2 for delicate interior carved stone and NHL 3.5 for exposed exterior walls) mixed with local siliceous sand.
Safety & Execution Protocols: All operations utilize certified tubular steel scaffolding with double guardrails and non-slip aluminum toe boards. Volunteers wear protective dust respirators, high-impact safety glasses, and heavy-duty nitrile-coated masonry gloves.
Participant Metrics: In the past field season alone, our masonry work parties engaged 38 community volunteers over 1,420 recorded hours, restoring 145 linear meters of historic boundary wall and securing 18 limestone corbels.
Heritage Washhouses & Rural Waterway Revitalization
Preserving the nineteenth-century public washhouses (lavoirs), communal fountains, and historic hydraulic conduits that supported village community life.
Technical Scope & Materials: Washhouses combine underwater stone masonry, timber framing, and clay tile roofing. Our conservation teams clear silt and gravel from gravity-fed spring channels, repair submerged ashlar stone basin liners using water-resistant pozzolanic hydraulic lime, and inspect heavy oak roof trusses for wood-boring beetle infestations.
Ecological Compatibility: Because washhouses connect directly to natural regional streams, we prohibit synthetic chemicals, bleach, or pressure washers. Algae and moss are scraped using stiff horsehair brushes, and wooden trusses are treated with certified organic linseed oil and natural beeswax.
Participant Metrics: Over the last eighteen months, 42 volunteers dedicated 860 field hours to clearing the intake flume and rehabilitating the timber framework of the Grand Lavoir at Rue du Plat d'Étain, restoring safe pedestrian access for residents.
Archival Research, Cartography & Monument Inventory
Building an exhaustive, publicly accessible digital and physical repository documenting the architectural history of every landmark in Senantes.
Research Scope: Our archival volunteers travel weekly to the Archives Départementales d'Eure-et-Loir in Chartres and consult municipal ledgers spanning from the seventeenth century to the post-war era. Researchers transcribe civil status registers, extract ancient property deeds, and study the Napoleonic land registry (Cadastre Napoléonien of 1826) to determine the exact construction dates, builders, and past modifications of village buildings.
Open-Access Deliverables: All research findings are compiled into standardized architectural monographs that are deposited free of charge in the Senantes municipal archive and published on our Resources portal for students, architects, and family historians.
Participant Metrics: The archival team comprises 12 dedicated researchers who have logged 640 hours, digitizing over 350 historical documents and transcribing 82 historical deeds.
Public Educational Walks & Intergenerational Workshops
Connecting local residents, school pupils, and regional visitors with the tangible history of their surroundings through free guided discovery outings.
Educational Philosophy: Heritage belongs to everyone. Our public tours demystify architecture by teaching participants how to read historical clues in village buildings: tool marks left on stone faces, carpenter assembly marks (marques d'assemblage) carved into oak roof trusses, and changes in mortar color that indicate historical renovations following periods of conflict or economic expansion.
Youth Engagement: During school vacations, we organize tactile stone-carving workshops where children use soft limestone scrapers and wooden mallets to carve their own initial stones, learning the basics of architectural geometry and structural balance.
Participant Metrics: Our educational program has hosted 16 free public walking tours welcoming over 450 attendees, as well as 8 dedicated classroom sessions benefiting more than 180 local schoolchildren.
Annual Field Operations Log & Verified Outcomes
Summary of completed and scheduled field interventions verified by our technical coordination committee.
| Project Designation | Location & Coordinates | Intervention Scope | Field Dates | Current Status |
|---|---|---|---|---|
| Saint-Pierre Parvis Wall | Parc de l'Église, Senantes Center | Raking out cracked modern cement, deep pointing with NHL 3.5 lime mortar, capping stone resets. | May – July 2025 | Completed & Certified |
| Grand Lavoir Flume Clearance | Rue du Plat d'Étain, Senantes | Removal of 12 cubic meters of silt, clearing intake grates, replacing rotted oak floorboards. | Sept – Oct 2025 | Completed & Certified |
| Northern Wayside Cross Pedestal | Crossroads D114 / Route de Senantes | Stabilization of octagonal carved limestone base, rust-passivation of nineteenth-century iron armature. | April – May 2026 | Active Fieldwork |
| Cadastral Atlas Digitization | Municipal Library & Chartres Archives | High-resolution scanning of 1826 cadastral registry sections and cross-indexing with contemporary parcels. | Ongoing 2026 | In Progress (75%) |
| Youth Stone-Carving Discovery | Salle Communale de Senantes | Free hands-on workshops introducing stonecutting geometry to local primary school pupils. | June 2026 | Scheduled |
Technical Specifications for Historical Lime Formulations
To ensure consistency and historical fidelity across all volunteer worksites, our technical committee enforces rigorous material specifications.
Aggregate Sizing & Mineral Composition
Historical mortars in Senantes were never uniform factory blends. Masons gathered sands with varied angularity from regional river deposits to create an interlocking aggregate matrix with high shear strength and low shrinkage.
In our workshops, we utilize washed silica-calcareous sand with a graded grain curve ranging from 0 to 4 millimeters. The inclusion of coarser 2 to 4 millimeter grains creates microscopic capillary pathways that allow water vapor to escape without creating macroscopic fissures.
For fine joint pointing on sheltered decorative ashlar, we switch to a 0 to 2 millimeter sand sifted through brass mesh screens. The sand is thoroughly dried before batching to ensure accurate volumetric proportions: typically one part natural hydraulic lime (NHL 2 or NHL 3.5) to two and a half parts blended sand.
Curing, Hydration & Protection Against Desiccation
Unlike modern Portland cement which hardens through rapid chemical hydration, natural hydraulic lime hardens in two distinct phases: an initial hydraulic set over twenty-four to forty-eight hours, followed by months of slow carbonation as free lime absorbs atmospheric carbon dioxide.
To prevent rapid drying out caused by direct summer sunlight or dry winds, our volunteers implement strict moisture-protection routines:
- Pre-wetting stone joints thoroughly the evening prior and morning of mortar application to prevent dry limestone from sucking water out of the fresh mix.
- Compacting the mortar firmly into joints using specialized pointing irons to eliminate air pockets.
- Covering newly pointed walls with dampened organic jute hessian tarpaulins, lightly misting them twice daily for five consecutive days.
Ready to Get Your Hands on the Stones of Senantes?
Our programs welcome everyone regardless of experience level. All required tools, personal protective equipment, and professional instruction are provided entirely free of charge.