If a building is suspected of having a pyrite problem some of the typical observable signs are:
- Heaving (lifting) of a floor slab resulting in slopes and cracks.
- Cracks to concrete floors/tiles.Uplift at external door thresholds.
- Doors catching on floors.
- Cracks over doors on internal walls.
- Ground floor stud partitions with cracks, bulging of plasterslabs.
- Horizontal cracking externally at DPC level.