Pyritic heave - Revision history

Editor at 19:22, 16 September 2025

2025-09-16T19:22:53Z

← Older revision		Revision as of 19:22, 16 September 2025
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	Pyritic heave was a major problem in Ireland from 2006 to 2008, with thousands of properties found to, in particular around Dublin. These were said to be caused during the period of rapid construction that occurred during what was referred to as the Celtic Tiger economic boom, named in reference to similar 'tiger' booms that had occurred in Asia. During this time the use of reactive pyrite-containing aggregate on many projects left lasting issues. Other instances of pyritic heave have also been discovered in United States (Ohio and Pennsylvania), as well as Canada.		Pyritic heave was a major problem in Ireland from 2006 to 2008, with thousands of properties found to, in particular around Dublin. These were said to be caused during the period of rapid construction that occurred during what was referred to as the Celtic Tiger economic boom, named in reference to similar 'tiger' booms that had occurred in Asia. During this time the use of reactive pyrite-containing aggregate on many projects left lasting issues. Other instances of pyritic heave have also been discovered in United States (Ohio and Pennsylvania), as well as Canada.

−	This issues were so signifiant in Ireland that a Pyrite Resolution Board (PRB) was established and the Pyrite Resolution Act of 2013 passed by the government. Following this a Pyrite Remediation Scheme (Scheme) was established by the government to remediate dwellings that had been significantly damaged as a result of pyritic heave caused by the swelling of hardcore under ground floor slabs. Under the Act the Pyrite Resolution Board was established, to oversee implementation of the scheme and manage the application and appeals process. ~~The~~ scheme continues today and is still run by the ~~The~~ Housing Agency, who were prescribed under the Act, to carry out the remediation of properties accepted into the scheme.	+	This issues were so signifiant in Ireland that a [https://www.pyriteboard.ie/Quick-Links.aspx Pyrite Resolution Board (PRB)] was established and the Pyrite Resolution Act of 2013 passed by the government. Following this a Pyrite Remediation Scheme (Scheme) was established by the government to remediate dwellings that had been significantly damaged as a result of pyritic heave caused by the swelling of hardcore under ground floor slabs. Under the Act the Pyrite Resolution Board was established, to oversee implementation of the scheme and manage the application and appeals process. In 2019 it was reported "[https://www.housingagency.ie/news-events/pyrite-scheme-extended-number-homes-remediated-reaches-2000 Pyrite scheme extended as number of homes remediated reaches 2,000]", the scheme continues today and is still run by the Housing Agency, who were prescribed under the Act, to carry out the remediation of properties accepted into the scheme.

	For further information see "[https://www.housingagency.ie/sites/default/files/Multi%20Unit%20Developments/Pyrite%20Remediation%20Scheme%20-%20Guide%20for%20Scheme%20Participants%203rd%20Edition%20February%202019%20Issue.pdf Pyrite Remediation Scheme. Guide for Scheme Participants]" 3rd Edition February 2019.		For further information see "[https://www.housingagency.ie/sites/default/files/Multi%20Unit%20Developments/Pyrite%20Remediation%20Scheme%20-%20Guide%20for%20Scheme%20Participants%203rd%20Edition%20February%202019%20Issue.pdf Pyrite Remediation Scheme. Guide for Scheme Participants]" 3rd Edition February 2019.

−	[[Category:~~Articles_needing_more_work~~]]	+	= Related articles =
		+
		+	* Agglomeration.
		+	* Aggregate.
		+	* Alluvium.
		+	* Archaeology.
		+	* Cracking and building movement.
		+	* Cracking in buildings BR 292
		+	* Iron.
		+	* English Heritage.
		+	* Historic England.
		+	* Latent defects
		+	* Pyrite and mica redress issues in Dail Eireann.
		+	* Soil survey.
		+	* Types of soil.
		+	* Why do buildings crack? (DG 361)
		+
		+	[[Category:DCN_Commentary]] [[Category:DCN_Definition]] [[Category:DCN_Project_Knowledge]] [[Category:DCN_Specification]] [[Category:Definitions]] [[Category:Water]]

Editor at 19:14, 16 September 2025

2025-09-16T19:14:26Z

← Older revision		Revision as of 19:14, 16 September 2025
Line 5:		Line 5:
	Pyritic heave was a major problem in Ireland from 2006 to 2008, with thousands of properties found to, in particular around Dublin. These were said to be caused during the period of rapid construction that occurred during what was referred to as the Celtic Tiger economic boom, named in reference to similar 'tiger' booms that had occurred in Asia. During this time the use of reactive pyrite-containing aggregate on many projects left lasting issues. Other instances of pyritic heave have also been discovered in United States (Ohio and Pennsylvania), as well as Canada.		Pyritic heave was a major problem in Ireland from 2006 to 2008, with thousands of properties found to, in particular around Dublin. These were said to be caused during the period of rapid construction that occurred during what was referred to as the Celtic Tiger economic boom, named in reference to similar 'tiger' booms that had occurred in Asia. During this time the use of reactive pyrite-containing aggregate on many projects left lasting issues. Other instances of pyritic heave have also been discovered in United States (Ohio and Pennsylvania), as well as Canada.

−	This ~~issue~~ were so ~~signifcant~~ in ~~ireland~~ that the	+	This issues were so signifiant in Ireland that a Pyrite Resolution Board (PRB) was established and the Pyrite Resolution Act of 2013 passed by the government. Following this a Pyrite Remediation Scheme (Scheme) was established by the government to remediate dwellings that had been significantly damaged as a result of pyritic heave caused by the swelling of hardcore under ground floor slabs. Under the Act the Pyrite Resolution Board was established, to oversee implementation of the scheme and manage the application and appeals process. The scheme continues today and is still run by the The Housing Agency, who were prescribed under the Act, to carry out the remediation of properties accepted into the scheme.

−	The Pyrite Remediation Scheme (Scheme) was established to remediate dwellings that have been significantly damaged as a result of pyritic heave caused by the swelling of hardcore under ground floor slabs. ~~The Scheme was prepared by thePyrite Resolution Board (PRB)- Opens in new window under the~~ Pyrite ~~Resolution Act 2013~~- ~~Opens in new window~~.	+	For further information see "[https://www.housingagency.ie/sites/default/files/Multi%20Unit%20Developments/Pyrite%20Remediation%20Scheme%20-%20Guide%20for%20Scheme%20Participants%203rd%20Edition%20February%202019%20Issue.pdf Pyrite Remediation Scheme. Guide for Scheme Participants]" 3rd Edition February 2019.
−		+
−	~~The Pyrite Resolution Board was established under the Act, to oversee the implementation of the scheme and manage the application and appeals process.~~	+
−		+
−	~~The Housing Agency, as prescribed under the Act, is tasked with carrying out the remediation of properties accepted into the scheme.~~	+
−		+
−	~~The details, terms and conditions and eligibility criteria of the Scheme are set in Pyrite Resolution Board -~~ Pyrite Remediation Scheme.~~- Opens in new window The stages in the~~ Scheme ~~are as follows:~~	+

	[[Category:Articles_needing_more_work]]		[[Category:Articles_needing_more_work]]

Editor: Created page with "Pyritic heave is a structural defect that occurs when pyrite, a naturally occurring sulphide mineral present in hardcore fill beneath concrete floors, oxidises upon exposure to m..."

2025-09-16T19:09:09Z

Created page with "Pyritic heave is a structural defect that occurs when pyrite, a naturally occurring sulphide mineral present in hardcore fill beneath concrete floors, oxidises upon exposure to m..."

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Pyritic heave is a structural defect that occurs when pyrite, a naturally occurring sulphide mineral present in hardcore fill beneath concrete floors, oxidises upon exposure to moisture and air. This oxidation process transforms pyrite into gypsum, a mineral with a much larger volume. As the gypsum expands, it exerts pressure on the overlying concrete slab, causing it to lift and crack, while also distorting and damaging internal walls, finishes, doors, and windows. The issue most commonly affects houses with ground-supported concrete floors built on pyrite-rich fill, particularly from quarries or mudstone deposits, and typically manifests years after construction.

The signs of pyritic heave become visible gradually, often a decade after building completion. Common indicators include spiderweb-like cracking patterns on concrete slabs, uneven or humped floors, and cracks in partition walls or plasterboard. Doors and windows may begin to stick or fail to close properly due to structural distortion, while secondary damage appears in finishes like tiling and plaster. Because the process is progressive and driven by chemical reactions in the foundation material, early detection is crucial to mitigate costly structural repairs and protect building integrity.

Pyritic heave was a major problem in Ireland from 2006 to 2008, with thousands of properties found to, in particular around Dublin. These were said to be caused during the period of rapid construction that occurred during what was referred to as the Celtic Tiger economic boom, named in reference to similar 'tiger' booms that had occurred in Asia. During this time the use of reactive pyrite-containing aggregate on many projects left lasting issues. Other instances of pyritic heave have also been discovered in United States (Ohio and Pennsylvania), as well as Canada.

This issue were so signifcant in ireland that the

The Pyrite Remediation Scheme (Scheme) was established to remediate dwellings that have been significantly damaged as a result of pyritic heave caused by the swelling of hardcore under ground floor slabs. The Scheme was prepared by thePyrite Resolution Board (PRB)- Opens in new window under the Pyrite Resolution Act 2013- Opens in new window.

The Pyrite Resolution Board was established under the Act, to oversee the implementation of the scheme and manage the application and appeals process.

The Housing Agency, as prescribed under the Act, is tasked with carrying out the remediation of properties accepted into the scheme.

The details, terms and conditions and eligibility criteria of the Scheme are set in Pyrite Resolution Board - Pyrite Remediation Scheme.- Opens in new window The stages in the Scheme are as follows:

[[Category:Articles_needing_more_work]]