The pyrite remediation scheme is first and foremost a works scheme aimed at remediating dwellings affected by significant damage attributable to pyritic heave in the subfloor hardcore material. Remediation works are carried out in accordance with I.S. 398-2:2013 Reactive pyrite in sub-floor hardcore material - Part 2: Methodology for remediation works, published by the National Standards Authority of Ireland in January 2013, which sets out a clear methodology for the remediation of dwellings affected by pyrite in the subfloor hardcore.
The guidance provided by the Housing Agency in their Pyrite Remediation Scheme - Guide for Scheme Participants (January 2015) clearly sets out that the survey carried out by the construction professional, engaged by the Agency to prepare the remedial works plan, is not a full condition survey and, accordingly, is non-invasive. Any defects, damage or substandard works not attributable to pyritic heave, if such exist and are observed during the survey, are outside the scope of the scheme and should be investigated by the scheme participant’s own construction professional who will be able to advise on the severity of the issue and the appropriate action that should be taken to mitigate any risk to health and safety.
Under the scheme, remedial works are typically confined to the removal of hardcore from under the ground floor of the dwelling and from within 500 mm of the perimeter of the dwelling. However, where defects are discovered during the removal of the existing floor slab and the defective hardcore material, which impact on the structural stability of the dwelling and the health and safety of the occupants, the works contractor may, in accordance with good building practice, remedy such defects prior to the installation of replacement hardcore material and/or the reinstatement of the concrete floor slab. Any other defects, damage or substandard works which are not attributable to pyritic heave and are unaffected by pyrite remediation works (i.e. the removal and replacement of the concrete floor slab and hardcore material) remain the responsibility of the homeowners.
