Chemical injected DPC - Revision history

Editor at 17:04, 14 December 2021

2021-12-14T17:04:54Z

← Older revision		Revision as of 17:04, 14 December 2021
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	Other solutions might include the insertion of a DPC (rather than injection) or drainage solutions such as french drains.		Other solutions might include the insertion of a DPC (rather than injection) or drainage solutions such as french drains.

−	~~= Find out more =~~	+	= Related articles on Designing Buildings =
−		+
−	=== Related articles on Designing Buildings ~~Wiki ==~~=	+

	* Breather membrane.		* Breather membrane.
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	* Rising damp.		* Rising damp.
	* Rising damp in walls - diagnosis and treatment (DG 245).		* Rising damp in walls - diagnosis and treatment (DG 245).
		+	* Types of damp-proof courses.
	* Vapour barrier.		* Vapour barrier.

	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Construction_techniques]]		[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Construction_techniques]]

Editor: Reverted edits by 105.242.165.155 (talk) to last revision by Designing Buildings

2021-08-05T10:04:20Z

Reverted edits by 105.242.165.155 (talk) to last revision by Designing Buildings

← Older revision		Revision as of 10:04, 5 August 2021
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	* Vapour barrier.		* Vapour barrier.

−	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge~~]] [[Category:Case_law]] [[Category:Health_and_safety_/_CDM]] [[Category:Planning_permission]] [[Category:Property_law]] [[Category:Regulations~~]] [[Category:Construction_techniques]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Construction_techniques]]

105.242.165.155 at 09:39, 5 August 2021

2021-08-05T09:39:21Z

← Older revision		Revision as of 09:39, 5 August 2021
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	* Vapour barrier.		* Vapour barrier.

−	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Construction_techniques]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Case_law]] [[Category:Health_and_safety_/_CDM]] [[Category:Planning_permission]] [[Category:Property_law]] [[Category:Regulations]] [[Category:Construction_techniques]]

Designing Buildings at 08:37, 1 November 2020

2020-11-01T08:37:57Z

← Older revision		Revision as of 08:37, 1 November 2020
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	* Vapour barrier.		* Vapour barrier.

−	[[Category:Construction_techniques]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Construction_techniques]]

Designing Buildings at 12:00, 15 December 2017

2017-12-15T12:00:18Z

← Older revision		Revision as of 12:00, 15 December 2017
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	* Health problems.		* Health problems.

−	Modern buildings avoid rising damp by the inclusion of a damp-proof course (DPC), a barrier, usually formed by a membrane built into the walls ~~of a property~~. However, older buildings may not have a DPC. In this case, a chemical injected DPC ~~(damp proof course)~~ can be inserted to create a continuous chemical barrier to rising damp.	+	Modern buildings avoid rising damp by the inclusion of a damp-proof course (DPC), a barrier, usually formed by a membrane built into the walls. However, older buildings may not have a DPC. In this case, a chemical injected DPC can be inserted to create a continuous chemical barrier to rising damp.

	A series of holes are drilled into the wall at low level, the number and pattern of which is determined by the construction of the wall and its thickness. High and low pressure injection can then used to introduce a water-repellent chemical fluid that penetrates across the wall and between the holes forming a continuous barrier.		A series of holes are drilled into the wall at low level, the number and pattern of which is determined by the construction of the wall and its thickness. High and low pressure injection can then used to introduce a water-repellent chemical fluid that penetrates across the wall and between the holes forming a continuous barrier.

−	Treatment generally also involves remedial work to any corroded or decayed elements of the building fabric, as well as hacking off and replacing existing plaster to a height of 1 m (sometimes with a waterproof plaster). ~~This~~ can be very disruptive as sockets have to be taken out, skirting boards removed, radiators removed and so on.	+	Treatment generally also involves remedial work to any corroded or decayed elements of the building fabric, as well as hacking off and replacing existing plaster to a height of 1 m (sometimes replacing it with a waterproof plaster). However, this can be very disruptive as sockets have to be taken out, skirting boards removed, radiators removed and so on.

−	The technique is best suited to brick or block buildings, as they tend to be of a relatively uniform construction. However, it may not be effective if any gaps are left in the wall construction, or if gaps form over time with material deterioration. Equally, if the method is applied to walls that comprise materials of varying permeability levels, such as ~~cavity~~ walls with rubble infill, it can be unreliable as the injected solution may not accumulate where it is required in the sufficient quantities. This can be due to the solution following the lines of least resistance in the wall material.	+	The technique is best suited to brick or block buildings, as they tend to be of a relatively uniform construction. However, it may not be effective if any gaps are left in the wall construction, or if gaps form over time with material deterioration. Equally, if the method is applied to walls that comprise materials of varying permeability levels, such as walls with rubble infill, it can be unreliable as the injected solution may not accumulate where it is required in the sufficient quantities. This can be due to the solution following the lines of least resistance in the wall material.

	Damp in some older buildings may actually be caused by a leak or a defect in the wall construction, such as a cracking, rather than by rising damp, and this may not be rectified by the insertion of a damp-proof course. It is important therefore that any defects are identified and corrected first before accepting the cost and disruption of inserting a damp-proof course.		Damp in some older buildings may actually be caused by a leak or a defect in the wall construction, such as a cracking, rather than by rising damp, and this may not be rectified by the insertion of a damp-proof course. It is important therefore that any defects are identified and corrected first before accepting the cost and disruption of inserting a damp-proof course.

−	Other solutions might include the insertion of a DPC (rather than injection).	+	Other solutions might include the insertion of a DPC (rather than injection) or drainage solutions such as french drains.

	= Find out more =		= Find out more =

Designing Buildings at 11:51, 15 December 2017

2017-12-15T11:51:05Z

← Older revision		Revision as of 11:51, 15 December 2017
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	Damp in some older buildings may actually be caused by a leak or a defect in the wall construction, such as a cracking, rather than by rising damp, and this may not be rectified by the insertion of a damp-proof course. It is important therefore that any defects are identified and corrected first before accepting the cost and disruption of inserting a damp-proof course.		Damp in some older buildings may actually be caused by a leak or a defect in the wall construction, such as a cracking, rather than by rising damp, and this may not be rectified by the insertion of a damp-proof course. It is important therefore that any defects are identified and corrected first before accepting the cost and disruption of inserting a damp-proof course.
		+
		+	Other solutions might include the insertion of a DPC (rather than injection).

	= Find out more =		= Find out more =

Designing Buildings at 11:48, 15 December 2017

2017-12-15T11:48:49Z

← Older revision		Revision as of 11:48, 15 December 2017
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	Modern buildings avoid rising damp by the inclusion of a damp-proof course (DPC), a barrier, usually formed by a membrane built into the walls of a property. However, older buildings may not have a DPC. In this case, a chemical injected DPC (damp proof course) can be inserted to create a continuous chemical barrier to rising damp.		Modern buildings avoid rising damp by the inclusion of a damp-proof course (DPC), a barrier, usually formed by a membrane built into the walls of a property. However, older buildings may not have a DPC. In this case, a chemical injected DPC (damp proof course) can be inserted to create a continuous chemical barrier to rising damp.

−	A series of holes are drilled into the wall, the number and pattern of which is determined by the construction of the wall and its thickness. High and low pressure injection can then used to introduce a chemical fluid to the wall.	+	A series of holes are drilled into the wall at low level, the number and pattern of which is determined by the construction of the wall and its thickness. High and low pressure injection can then used to introduce a water-repellent chemical fluid that penetrates across the wall and between the holes forming a continuous barrier.
		+
		+	Treatment generally also involves remedial work to any corroded or decayed elements of the building fabric, as well as hacking off and replacing existing plaster to a height of 1 m (sometimes with a waterproof plaster). This can be very disruptive as sockets have to be taken out, skirting boards removed, radiators removed and so on.

	The technique is best suited to brick or block buildings, as they tend to be of a relatively uniform construction. However, it may not be effective if any gaps are left in the wall construction, or if gaps form over time with material deterioration. Equally, if the method is applied to walls that comprise materials of varying permeability levels, such as cavity walls with rubble infill, it can be unreliable as the injected solution may not accumulate where it is required in the sufficient quantities. This can be due to the solution following the lines of least resistance in the wall material.		The technique is best suited to brick or block buildings, as they tend to be of a relatively uniform construction. However, it may not be effective if any gaps are left in the wall construction, or if gaps form over time with material deterioration. Equally, if the method is applied to walls that comprise materials of varying permeability levels, such as cavity walls with rubble infill, it can be unreliable as the injected solution may not accumulate where it is required in the sufficient quantities. This can be due to the solution following the lines of least resistance in the wall material.
		+
		+	Damp in some older buildings may actually be caused by a leak or a defect in the wall construction, such as a cracking, rather than by rising damp, and this may not be rectified by the insertion of a damp-proof course. It is important therefore that any defects are identified and corrected first before accepting the cost and disruption of inserting a damp-proof course.

	= Find out more =		= Find out more =

Designing Buildings at 11:44, 15 December 2017

2017-12-15T11:44:21Z

← Older revision		Revision as of 11:44, 15 December 2017
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−	Rising damp is ~~said to be~~ caused by capillary action drawing moisture up through porous elements of a building’s fabric.	+	Rising damp is caused by capillary action drawing moisture up through porous elements of a building’s fabric. This can result in:

−	~~Chemical injected DPC (~~damp ~~proof course) is a technique used to create a continuous chemical barrier throughout a wall~~ to ~~reduce rising damp~~. ~~A series~~ of ~~holes are drilled into the joints~~, ~~the number and pattern being determined by the construction of the wall and its thickness~~. ~~High~~ and ~~low pressure injection is then used~~ to ~~apply aqueous-based fluid inside~~ the ~~wall~~.	+	* Condensation or damp patches (typically up to 1 m above the floor).
		+	* Corrosion of metal elements such as beading.
		+	* Damp odours.
		+	* Timber decay, such as skirting boards.
		+	* Damage to surface finishes.
		+	* Tide marks and staining (typically up to 1 m above the floor).
		+	* The presence of white salts.
		+	* Health problems.

−	~~Chemical injection DPC is typically used for brick or block~~ buildings~~, as they can provide an effective barrier to~~ damp in the ~~short~~-~~to-medium term. This is because brick or block~~ walls ~~with strong cement mortar are~~ of a ~~uniform construction~~. However, ~~it is often~~ not ~~the most cost-effective solution and~~ can ~~prove inefficient as~~ a ~~preventative measure~~.	+	Modern buildings avoid rising damp by the inclusion of a damp-proof course (DPC), a barrier, usually formed by a membrane built into the walls of a property. However, older buildings may not have a DPC. In this case, a chemical injected DPC (damp proof course) can be inserted to create a continuous chemical barrier to rising damp.

−	~~An accelerated rate~~ of ~~decay~~ can be the ~~result~~ of any gaps left in the wall construction, or ~~of those that~~ form over time with material deterioration. Equally, if the method is applied to walls that comprise materials of varying permeability levels, such as cavity walls with rubble infill, it can be an unreliable ~~method since~~ the injected solution may not accumulate where it is required in the sufficient quantities. This can be due to the solution following the lines of least resistance in the wall material.	+	A series of holes are drilled into the wall, the number and pattern of which is determined by the construction of the wall and its thickness. High and low pressure injection can then used to introduce a chemical fluid to the wall.
		+
		+	The technique is best suited to brick or block buildings, as they tend to be of a relatively uniform construction. However, it may not be effective if any gaps are left in the wall construction, or if gaps form over time with material deterioration. Equally, if the method is applied to walls that comprise materials of varying permeability levels, such as cavity walls with rubble infill, it can be unreliable as the injected solution may not accumulate where it is required in the sufficient quantities. This can be due to the solution following the lines of least resistance in the wall material.

	= Find out more =		= Find out more =

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2017-12-06T14:51:28Z

Created page with "Rising damp is said to be caused by capillary action drawing moisture up through porous elements of a building’s fabric. Chemical injected DPC (damp proof course) is a techniq..."

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Rising damp is said to be caused by capillary action drawing moisture up through porous elements of a building’s fabric.

Chemical injected DPC (damp proof course) is a technique used to create a continuous chemical barrier throughout a wall to reduce rising damp. A series of holes are drilled into the joints, the number and pattern being determined by the construction of the wall and its thickness. High and low pressure injection is then used to apply aqueous-based fluid inside the wall.

Chemical injection DPC is typically used for brick or block buildings, as they can provide an effective barrier to damp in the short-to-medium term. This is because brick or block walls with strong cement mortar are of a uniform construction. However, it is often not the most cost-effective solution and can prove inefficient as a preventative measure.

An accelerated rate of decay can be the result of any gaps left in the wall construction, or of those that form over time with material deterioration. Equally, if the method is applied to walls that comprise materials of varying permeability levels, such as cavity walls with rubble infill, it can be an unreliable method since the injected solution may not accumulate where it is required in the sufficient quantities. This can be due to the solution following the lines of least resistance in the wall material.

= Find out more =

=== Related articles on Designing Buildings Wiki ===

* Breather membrane.
* Damp-proof course DPC.
* Damp proof membrane.
* Interstitial condensation.
* Rising damp.
* Rising damp in walls - diagnosis and treatment (DG 245).
* Vapour barrier.

[[Category:Construction_techniques]]