Pyrite Problem Remediation
Background
Four houses built in 2008 had pyrite issues. Pyrite, also known as “fool’s gold,” may ruin structures by oxidising and expanding, lifting and cracking concrete floors. This case study details GreenTec Construction’s pyrite cleanup method, including its challenges and successes.
Objective
The purpose of this case study is to give a full picture of the pyrite remediation process that GreenTec Construction used, showing their expertise and careful approach to dealing with such a complicated issue.
The Problem
Pyrite-Induced Damage
Customer satisfaction
Remediation Process
Preliminary Assessment
GreenTec Construction collaborated with DBFL, a firm specialising in pyrite remediation, to conduct a thorough assessment of the affected properties.
This Phase Involved
- Inspecting the extent of the damage
- Testing the backfill material for pyrite content
- Developing a detailed remediation plan
Removal of Affected Materials
To effectively address the pyrite problem, the following steps were taken
- Removal of all interior fittings, including kitchens, stairs, door frames, and skirting boards.
- Carefully dismantling fixtures to minimise damage and facilitate reinstallation.
- Cutting the concrete floor using a 17-inch consaw.
- Breaking and excavating the concrete to access the underlying pyrite-infested stone.
- Digging out all the stone beneath the concrete floor.
- Extending the excavation to include a 1-meter perimeter around the exterior of the houses.
- Ensuring complete removal of pyrite-contaminated stone to prevent recurrence.
Replacement and Restoration
1 Installation of New Backfill
- Handpicking a quarry known for providing tested, pyrite-free stone.
- Transporting and installing the new stone backfill, ensuring proper compaction and stability.
2 Reconstruction of Concrete Floors
- Pouring new concrete floors with reinforced materials to enhance durability.
- Ensuring the new floors are level and properly cured to prevent future issues.
3 Reinstallation of Interior Fixtures
- Reinstalling kitchens, stairs, door frames, and skirting boards with precision.
- Ensuring all fixtures are aligned and securely installed.
4 Exterior Restoration
- Replacing all pipework and services around the exterior perimeter.
- Backfilling and restoring the exterior landscape to its original condition.
5 Final Touches
To restore the houses to their original state, GreenTec Construction also
- Replaced all carpets with new, high-quality materials.
- Repainted the entire interior of each house, ensuring a fresh and clean finish.
Outcomes
Success Metrics
All four houses were restored to a structurally sound condition, free from pyrite-related issues.
Homeowners were highly satisfied with the quality of work and the meticulous attention to detail throughout the remediation process.
The use of tested, pyrite-free stone and reinforced concrete floors ensured the long-term stability and durability of the houses.
Conclusion
GreenTec Construction’s expertise and collaboration with DBFL helped fix the residences’ pyrite issues. The rigorous examination and repair procedure demonstrate GreenTec Construction’s dedication to quality and customer satisfaction. This case study shows the company’s precision and professionalism in handling complicated structural issues.
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