Cavity wall insulation - Revision history

Editor at 12:31, 7 February 2022

2022-02-07T12:31:20Z

← Older revision		Revision as of 12:31, 7 February 2022
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	In 2015, The Property Care Association reported on the causes and consequences of defective cavity wall insulation, suggesting that installers has no design responsibility, and took little care to ensure that known problems were avoided or that only suitable buildings were treated. (Ref. Construction Manager 18 December 2015.)		In 2015, The Property Care Association reported on the causes and consequences of defective cavity wall insulation, suggesting that installers has no design responsibility, and took little care to ensure that known problems were avoided or that only suitable buildings were treated. (Ref. Construction Manager 18 December 2015.)

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

	* Aerogel.		* Aerogel.
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	* Roof insulation.		* Roof insulation.
	* Solid wall insulation.		* Solid wall insulation.
		+	* The cavity wall real performance question.
	* Thermal comfort.		* Thermal comfort.
	* Thermal insulation for buildings.		* Thermal insulation for buildings.

Designing Buildings at 08:00, 17 September 2020

2020-09-17T08:00:43Z

← Older revision		Revision as of 08:00, 17 September 2020
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	* [http://www.ciga.co.uk/ Cavity Insulation Guarantee Agency] (CIGA).		* [http://www.ciga.co.uk/ Cavity Insulation Guarantee Agency] (CIGA).

−	[[Category:~~Sustainability~~]] [[Category:~~Construction_techniques~~]] [[Category:~~Products_/_components~~]] [[Category:~~DCN_Product_Knowledge~~]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Sustainability]] [[Category:Construction_techniques]] [[Category:Products_/_components]]

Editor at 18:48, 22 October 2019

2019-10-22T18:48:57Z

← Older revision		Revision as of 18:48, 22 October 2019
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	* Hempcrete.		* Hempcrete.
	* Insulation.		* Insulation.
		+	* Mineral wool.
	* Polyurethane spray foam in structurally insulated panels and composite structures.		* Polyurethane spray foam in structurally insulated panels and composite structures.
	* Roof insulation.		* Roof insulation.
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	* [http://www.ciga.co.uk/ Cavity Insulation Guarantee Agency] (CIGA).		* [http://www.ciga.co.uk/ Cavity Insulation Guarantee Agency] (CIGA).

−	[[Category:Sustainability]] [[Category:Construction_techniques]] [[Category:Products_/_components]]	+	[[Category:Sustainability]] [[Category:Construction_techniques]] [[Category:Products_/_components]] [[Category:DCN_Product_Knowledge]]

Designing Buildings at 13:57, 24 September 2018

2018-09-24T13:57:51Z

← Older revision		Revision as of 13:57, 24 September 2018
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	NB: For solid walls, which do not include a cavity, insulation can be introduced by fixing insulation boards to the internal surface of walls, or by building an internal stud-wall adjacent to their surface and then insulating the cavity between the stud wall and the external wall. Alternatively the external surfaces of walls can be insulated by fixing an insulating material to them and then finishing the insulation with render or with cladding materials. See Solid wall insulation for more information.		NB: For solid walls, which do not include a cavity, insulation can be introduced by fixing insulation boards to the internal surface of walls, or by building an internal stud-wall adjacent to their surface and then insulating the cavity between the stud wall and the external wall. Alternatively the external surfaces of walls can be insulated by fixing an insulating material to them and then finishing the insulation with render or with cladding materials. See Solid wall insulation for more information.

−	In 2015, The Property Care Association reported on the causes and consequences of defective cavity wall insulation, suggesting that installers has no design responsibility, and took little care to ensure that known problems were avoided or that only suitable buildings were treated. (Ref. ~~[http://www.construction-manager.co.uk/comment/price-failed-cav8ity-wall-insu4lation-hom4eowners/~~ Construction Manager 18 December 2015].)	+	In 2015, The Property Care Association reported on the causes and consequences of defective cavity wall insulation, suggesting that installers has no design responsibility, and took little care to ensure that known problems were avoided or that only suitable buildings were treated. (Ref. Construction Manager 18 December 2015.)

	= Find out more =		= Find out more =

Designing Buildings at 07:56, 16 June 2018

2018-06-16T07:56:14Z

← Older revision		Revision as of 07:56, 16 June 2018
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	* Approved document D.		* Approved document D.
	* BREEAM Insulation.		* BREEAM Insulation.
		+	* Building damp-free cavity walls.
	* Building fabric.		* Building fabric.
	* Cavity tray.		* Cavity tray.

Designing Buildings at 13:51, 4 May 2018

2018-05-04T13:51:34Z

← Older revision		Revision as of 13:51, 4 May 2018
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	* Aerogel.		* Aerogel.
	* Approved document D.		* Approved document D.
		+	* BREEAM Insulation.
	* Building fabric.		* Building fabric.
	* Cavity tray.		* Cavity tray.
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	* Roof insulation.		* Roof insulation.
	* Solid wall insulation.		* Solid wall insulation.
−	* Stud.
	* Thermal comfort.		* Thermal comfort.
	* Thermal insulation for buildings.		* Thermal insulation for buildings.
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	* U-value.		* U-value.
	* Vapour barrier.		* Vapour barrier.
−	* Wall ties.
−	* Weep hole.

	=== External references. ===		=== External references. ===

Editor at 15:07, 23 January 2018

2018-01-23T15:07:28Z

← Older revision		Revision as of 15:07, 23 January 2018
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	* Thermal comfort.		* Thermal comfort.
	* Thermal insulation for buildings.		* Thermal insulation for buildings.
−	* Transparent insulation	+	* Transparent insulation.
		+	* Types of insulation.
	* U-value.		* U-value.
	* Vapour barrier.		* Vapour barrier.

Editor at 12:12, 23 January 2018

2018-01-23T12:12:10Z

Designing Buildings at 16:36, 11 December 2017

2017-12-11T16:36:08Z

← Older revision		Revision as of 16:36, 11 December 2017
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	=== External references. ===		=== External references. ===

−	* Energy Saving Trust, [http://www.energysavingtrust.org.uk/Insulation/Cavity-wall-insulation Cavity wall insulation].
	* [http://www.nia-uk.org/ National Insulation Association] (NIA).		* [http://www.nia-uk.org/ National Insulation Association] (NIA).
	* [http://www.ciga.co.uk/ Cavity Insulation Guarantee Agency] (CIGA).		* [http://www.ciga.co.uk/ Cavity Insulation Guarantee Agency] (CIGA).

	[[Category:Sustainability]] [[Category:Construction_techniques]] [[Category:Products_/_components]]		[[Category:Sustainability]] [[Category:Construction_techniques]] [[Category:Products_/_components]]

Editor at 17:04, 8 September 2017

2017-09-08T17:04:38Z

← Older revision		Revision as of 17:04, 8 September 2017
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	* Roof insulation.		* Roof insulation.
	* Solid wall insulation.		* Solid wall insulation.
		+	* Stud.
	* Thermal comfort.		* Thermal comfort.
	* Thermal insulation for buildings.		* Thermal insulation for buildings.

← Older revision		Revision as of 12:12, 23 January 2018
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	Due to the increasingly strict requirements of the buildings regulations, most new buildings will include insulation. However, it is only relatively recently that the buildings have been insulated, and only since the 1900s that they have even included cavities that might be insulated. Before this, most external walls were solid. This means that older buildings tend to transfer more heat between the inside and outside and so can be cold in the winter, hot in the summer, can suffer condensation, can be expensive to run, are high emitters of carbon and may not provide very good levels of thermal comfort.		Due to the increasingly strict requirements of the buildings regulations, most new buildings will include insulation. However, it is only relatively recently that the buildings have been insulated, and only since the 1900s that they have even included cavities that might be insulated. Before this, most external walls were solid. This means that older buildings tend to transfer more heat between the inside and outside and so can be cold in the winter, hot in the summer, can suffer condensation, can be expensive to run, are high emitters of carbon and may not provide very good levels of thermal comfort.

−	Typically buildings built between the 1920s and 1980s, with a cavity of at least ~~50mm~~ can be retrofitted with cavity insulation. This reduces their U-value and so improves their thermal performance. A boroscope inspection can be carried out by drilling a small hole in the wall to determine whether walls are suitable for cavity insulation. It is estimated that 5 million homes in the UK could benefit from cavity wall insulation. Ref [http://www.ciga.co.uk/cwi-info/the-benefits-of-insulation/ Cavity Insulation Guarantee Agency] (CIGA).	+	Typically, buildings built between the 1920s and 1980s, with a cavity of at least 50 mm can be retrofitted with cavity insulation. This reduces their U-value and so improves their thermal performance. A boroscope inspection can be carried out by drilling a small hole in the wall to determine whether walls are suitable for cavity insulation. It is estimated that 5 million homes in the UK could benefit from cavity wall insulation. (Ref. [http://www.ciga.co.uk/cwi-info/the-benefits-of-insulation/ Cavity Insulation Guarantee Agency] (CIGA).)

−	Cavities are insulated by drilling small holes at regular intervals in external walls and then 'blowing' or 'injecting' insulation into the cavity from the outside. Typically, water-repellent insulation is used such as; mineral wool, Expanded Polystyrene (EPS) beads combined with a binding agent, or Urea Formaldehyde (UF) foam insulation. The drilled holes are then filled to match the existing finish.	+	Cavities are insulated by drilling small holes at regular intervals in external walls and then 'blowing' or 'injecting' insulation into the cavity from the outside. Typically, water-repellent insulation is used such as mineral wool, Expanded Polystyrene (EPS) beads combined with a binding agent, or Urea Formaldehyde (UF) foam insulation. The drilled holes are then filled to match the existing finish.

	It is vital that the insulation fills all parts of the cavity, and for this to be possible, the installer must be able to access all parts of the external wall. Where the property is joined to a neighbouring property, it may be necessary to use a cavity barrier to prevent insulation entering the neighbouring cavity.		It is vital that the insulation fills all parts of the cavity, and for this to be possible, the installer must be able to access all parts of the external wall. Where the property is joined to a neighbouring property, it may be necessary to use a cavity barrier to prevent insulation entering the neighbouring cavity.
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	It is important to note that cavities were originally introduced into the external walls of buildings to prevent damp penetration. It is possible therefore, although not normal, that filling the cavity can cause damp problems. Typically this can occur if the property is very exposed, or if the external walls are in poor condition. Where there are existing damp problems in a property, these should be rectified before cavities are insulated.		It is important to note that cavities were originally introduced into the external walls of buildings to prevent damp penetration. It is possible therefore, although not normal, that filling the cavity can cause damp problems. Typically this can occur if the property is very exposed, or if the external walls are in poor condition. Where there are existing damp problems in a property, these should be rectified before cavities are insulated.

−	NB Damp insulation will also perform more poorly, resulting in greater heat loss.	+	NB: Damp insulation will also perform more poorly, resulting in greater heat loss.

	It is important to appoint an installer that offers a suitable independent guarantee for materials and workmanship, such as the CIGA 25-year guarantee.		It is important to appoint an installer that offers a suitable independent guarantee for materials and workmanship, such as the CIGA 25-year guarantee.
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	Installing cavity wall insulation can be a straight-forward process that is completed in a matter of hours and is not expensive. Schemes such as the Green Deal or Energy Company Obligation can be used to help finance cavity wall insulation, although in this case, an accredited installer must be used.		Installing cavity wall insulation can be a straight-forward process that is completed in a matter of hours and is not expensive. Schemes such as the Green Deal or Energy Company Obligation can be used to help finance cavity wall insulation, although in this case, an accredited installer must be used.

−	NB For solid walls, which do not include a cavity, insulation can be introduced by fixing insulation boards to the internal surface of walls, or by building an internal stud-wall adjacent to their surface and then insulating the cavity between the stud wall and the external wall. Alternatively the external surfaces of walls can be insulated by fixing an insulating material to them and then finishing the insulation with render or with cladding materials. See Solid wall insulation for more information.	+	NB: For solid walls, which do not include a cavity, insulation can be introduced by fixing insulation boards to the internal surface of walls, or by building an internal stud-wall adjacent to their surface and then insulating the cavity between the stud wall and the external wall. Alternatively the external surfaces of walls can be insulated by fixing an insulating material to them and then finishing the insulation with render or with cladding materials. See Solid wall insulation for more information.

−	In 2015, The Property Care Association reported on the causes and consequences of defective cavity wall insulation, suggesting that installers has no design responsibility, and took little care to ensure that known problems were avoided or that only suitable buildings were treated. Ref [http://www.construction-manager.co.uk/comment/price-failed-cav8ity-wall-insu4lation-hom4eowners/ Construction Manager 18 December 2015].	+	In 2015, The Property Care Association reported on the causes and consequences of defective cavity wall insulation, suggesting that installers has no design responsibility, and took little care to ensure that known problems were avoided or that only suitable buildings were treated. (Ref. [http://www.construction-manager.co.uk/comment/price-failed-cav8ity-wall-insu4lation-hom4eowners/ Construction Manager 18 December 2015].)

	= Find out more =		= Find out more =