🧱 Stone Shed Repointing — Kidlington
Breathable Lime Mortar Repointing for a Traditional Stone Outbuilding
Project Overview
This project involved the careful repointing of a traditional stone shed in Kidlington using breathable lime mortar. The structure, built from irregular local stone, had suffered from weathering, open joints, and areas of failing mortar that were no longer protecting the masonry. Some sections had been previously patched with hard cement, which was trapping moisture and accelerating deterioration.
The goal was to restore the shed using correct conservation methods, ensuring the stonework remains stable, breathable, and true to its original character.
Scope of Work
- Removal of failing and inappropriate mortar
- Careful cleaning of stone joints
- Repointing using breathable lime mortar
- Hand‑tooled finish to suit irregular stonework
- Protection of surrounding features and timber door
- Final clean‑down with no staining or smearing
​Condition Before Work
Before repointing, the shed showed typical signs of age and exposure:
- Mortar loss between irregular stones
- Cement patches restricting breathability
- Weathered joints allowing moisture ingress
- Vegetation growth in open joints
- Early signs of stone face deterioration
Without intervention, the structure would have continued to absorb water, leading to frost damage and long‑term instability.
​Our Conservation Approach
1. Hand Rake‑Out of Joints
All defective mortar was removed by hand to avoid damaging the irregular stone edges.
This is essential for older stone buildings where mechanical tools can cause irreversible harm.
2. Lime Mortar Selection
A breathable lime mortar was chosen to:
- Allow moisture to escape naturally
- Protect the softer stone
- Provide flexibility and movement
- Match the traditional appearance of the building
This ensures the shed performs as originally intended.
3. Traditional Application & Finishing
The mortar was packed deeply into the joints and finished by hand to complement the natural shape of the stones.
This creates a strong, durable bond while maintaining the rustic character of the building.
4. Clean, Controlled Workmanship
All surrounding features — including the timber door and roofline — were protected throughout the process.
The final clean‑down left the stonework crisp and free from lime staining.
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Results
The stone shed is now:
- Fully breathable
- Structurally protected
- Free from damaging cement repairs
- Finished with a clean, traditional lime mortar joint
- Restored in a way that respects its age and rural character
The repointing has significantly extended the lifespan of the structure and improved its appearance.
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