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New standards in place for houses with Pyrite

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Properties affected by pyrite may become easier to sell after the introduction of new standards outlining the risk of structural damage to the property.

A mineral that causes cracks in walls and floors, pyrite is believed to be present in about 12,000 homes.

The National Standards Authority of Ireland (NSAI) has outlined four risk categories which, it is hoped, will provide comfort for those thinking of buying an affected property.

Owners of properties where any pyrite is present may find it difficult to sell their homes, despite the risk of structural damage being negligible.

The new building categories of A, B, C, D set out the severity of pyrite-related manage and potential of future damage.

Buildings classed under category A are considered to have a negligible risk of damage in the future.

In B, there is a risk of minor damage which can be easily treated by filling cracks or repointing external masonry.

Category C is considered to have a medium risk, while D references significant or progressive damage.