Thermal bridging in buildings - Revision history

Designing Buildings at 08:46, 1 July 2022

2022-07-01T08:46:19Z

← Older revision		Revision as of 08:46, 1 July 2022
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	Thermal bridges in completed buildings can be revealed with thermal imaging cameras (see Thermographic survey), but they can be very difficult to rectify, particularly if they are repeated throughout a building.		Thermal bridges in completed buildings can be revealed with thermal imaging cameras (see Thermographic survey), but they can be very difficult to rectify, particularly if they are repeated throughout a building.

−	= Related articles on Designing Buildings ~~Wiki~~ =	+	NB [https://www.historicenvironment.scot/archives-and-research/publications/publication/?publicationId=8a2a7b9d-e3b2-4c7d-8c17-a59400a8387b Assessing risks in insulation retrofits using hygrothermal software tools, Heat and moisture transport in internally insulated stone walls], by Joseph Little, Calina Ferraro and Beñat Arregi, published by Historic Environment Scotland in 2015, defines thermal bypass as: ‘Heat transfer that bypasses the conductive or conductive-radiative heat transfer between two regions. It may well be a major contributor to the performance gap that appears to exist between predicted and actual thermal performance. Bypass mechanisms include air leakage, thermal looping, wind washing etc.’
		+
		+	= Related articles on Designing Buildings =

	* Accredited construction details ACDs.		* Accredited construction details ACDs.

Editor at 11:25, 12 May 2021

2021-05-12T11:25:18Z

← Older revision		Revision as of 11:25, 12 May 2021
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	* Reducing thermal bridging at junctions when designing and installing solid wall insulation FB 61.		* Reducing thermal bridging at junctions when designing and installing solid wall insulation FB 61.
	* Solid wall insulation.		* Solid wall insulation.
		+	* Thermal bridging and the Future Homes Standard.
	* Thermal comfort.		* Thermal comfort.
	* Thermal imaging to improve energy efficiency in building design.		* Thermal imaging to improve energy efficiency in building design.

Designing Buildings at 09:49, 10 September 2020

2020-09-10T09:49:03Z

← Older revision		Revision as of 09:49, 10 September 2020
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	* U-values.		* U-values.

−	[[Category:Theory]] [[Category:Sustainability]] [[Category:Design]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Regulation]] [[Category:Theory]] [[Category:Sustainability]] [[Category:Design]]

Designing Buildings at 07:56, 3 May 2020

2020-05-03T07:56:18Z

← Older revision		Revision as of 07:56, 3 May 2020
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	* Accredited construction details ACDs.		* Accredited construction details ACDs.
		+	* Assessing the effects of thermal bridging at junctions and around openings.
	* Building fabric.		* Building fabric.
	* Cavity wall.		* Cavity wall.

Designing Buildings at 07:25, 20 March 2020

2020-03-20T07:25:25Z

← Older revision		Revision as of 07:25, 20 March 2020
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	Thermal bridges in completed buildings can be revealed with thermal imaging cameras (see Thermographic survey), but they can be very difficult to rectify, particularly if they are repeated throughout a building.		Thermal bridges in completed buildings can be revealed with thermal imaging cameras (see Thermographic survey), but they can be very difficult to rectify, particularly if they are repeated throughout a building.

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

	* Accredited construction details ACDs.		* Accredited construction details ACDs.
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	* Solid wall insulation.		* Solid wall insulation.
	* Thermal comfort.		* Thermal comfort.
		+	* Thermal imaging to improve energy efficiency in building design.
	* Thermographic survey.		* Thermographic survey.
	* U-values.		* U-values.

	[[Category:Theory]] [[Category:Sustainability]] [[Category:Design]]		[[Category:Theory]] [[Category:Sustainability]] [[Category:Design]]

Designing Buildings at 11:07, 25 November 2018

2018-11-25T11:07:52Z

← Older revision		Revision as of 11:07, 25 November 2018
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	* Mould growth.		* Mould growth.
	* Roof insulation.		* Roof insulation.
		+	* Reducing thermal bridging at junctions when designing and installing solid wall insulation FB 61.
	* Solid wall insulation.		* Solid wall insulation.
	* Thermal comfort.		* Thermal comfort.

Designing Buildings at 10:59, 25 November 2018

2018-11-25T10:59:22Z

← Older revision		Revision as of 10:59, 25 November 2018
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	* Accredited construction details ACDs.		* Accredited construction details ACDs.
−	* Air tightness in buildings.
	* Building fabric.		* Building fabric.
	* Cavity wall.		* Cavity wall.
	* Co-heating test.		* Co-heating test.
	* Computational fluid dynamics.		* Computational fluid dynamics.
−	* Condensation.
−	* Conduction.
	* Conventions for calculating linear thermal transmittance and temperature factors.		* Conventions for calculating linear thermal transmittance and temperature factors.
−	* Defects in dot and dab.
	* Emission rates in the building regulations.		* Emission rates in the building regulations.
−	* Emissivity.
−	* Flashing.
	* Floor insulation.		* Floor insulation.
	* g-values.		* g-values.
−	* Humidity.
−	* Hygrothermal.
	* Insulation for ground floors.		* Insulation for ground floors.
	* Insulation specification.		* Insulation specification.
	* Interstitial condensation.		* Interstitial condensation.
	* Mould growth.		* Mould growth.
−	* Rising damp.
	* Roof insulation.		* Roof insulation.
	* Solid wall insulation.		* Solid wall insulation.

Editor at 11:07, 26 September 2017

2017-09-26T11:07:08Z

← Older revision		Revision as of 11:07, 26 September 2017
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	Thermal bridges can be categorised as 'repeating' for example where wall ties regularly bridge the cavity, or 'non-repeating' such as a wall junction or lintel.		Thermal bridges can be categorised as 'repeating' for example where wall ties regularly bridge the cavity, or 'non-repeating' such as a wall junction or lintel.

−	The Approved Documents to Part L of the building regulations (Conservation of fuel and power) state that 'The building fabric should be constructed so that there are no reasonably avoidable thermal bridges in the insulation layers caused by gaps within the various elements, at the joints between elements and at the edges of elements such as those around window and door openings.' They require that where unaccredited construction details are used, generic linear thermal bridge values must be increased by levels (depending on the building type) set out in the Approved Documents for the calculations of building emission rates (BER) or dwelling emission rates (DER).	+	The Approved Documents to Part L of the building regulations (Conservation of fuel and power) state that 'The building fabric should be constructed so that there are no reasonably avoidable thermal bridges in the insulation layers caused by gaps within the various elements, at the joints between elements and at the edges of elements such as those around window and door openings.'
		+
		+	They require that where unaccredited construction details are used, generic linear thermal bridge values must be increased by levels (depending on the building type) set out in the Approved Documents for the calculations of building emission rates (BER) or dwelling emission rates (DER).

	Thermal bridges in completed buildings can be revealed with thermal imaging cameras (see Thermographic survey), but they can be very difficult to rectify, particularly if they are repeated throughout a building.		Thermal bridges in completed buildings can be revealed with thermal imaging cameras (see Thermographic survey), but they can be very difficult to rectify, particularly if they are repeated throughout a building.
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	* g-values.		* g-values.
	* Humidity.		* Humidity.
		+	* Hygrothermal.
	* Insulation for ground floors.		* Insulation for ground floors.
	* Insulation specification.		* Insulation specification.

Editor at 14:46, 17 May 2017

2017-05-17T14:46:29Z

← Older revision		Revision as of 14:46, 17 May 2017
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−	A thermal bridge (sometimes referred to as thermal bridging, a cold bridge or thermal bypass) describes a situation in a building where there is a direct connection between the inside and outside through one or more elements that are more thermally conductive than the rest of the building envelope. As a result, there will be wasteful heat transfer across this element, its internal surface temperature will be different from other, better insulated internal surfaces and there may be condensation where warm, moist internal air comes into contact with the, potentially cold, surface. This condensation can result in mould growth.	+	A thermal bridge (sometimes referred to as thermal bridging, a cold bridge or thermal bypass) describes a situation in a building where there is a direct connection between the inside and outside through one or more elements that are more thermally conductive than the rest of the building envelope.
		+
		+	As a result, there will be wasteful heat transfer across this element, its internal surface temperature will be different from other, better insulated internal surfaces and there may be condensation where warm, moist internal air comes into contact with the, potentially cold, surface. This condensation can result in mould growth.

	Thermal bridges are common in older buildings, which may be poorly constructed, poorly insulated, with single skin construction and single glazing.		Thermal bridges are common in older buildings, which may be poorly constructed, poorly insulated, with single skin construction and single glazing.
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	* g-values.		* g-values.
	* Humidity.		* Humidity.
		+	* Insulation for ground floors.
	* Insulation specification.		* Insulation specification.
	* Interstitial condensation.		* Interstitial condensation.

Editor at 14:36, 12 July 2016

2016-07-12T14:36:14Z

← Older revision		Revision as of 14:36, 12 July 2016
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	However, as buildings have become better insulated, with increasingly strict regulation, so thermal bridges that might previously have been considered insignificant in terms of the overall thermal performance of a building, can actually be the cause of considerable thermal inefficiency. There is the potential for such inefficiency at every opening and every junction (even in party walls).		However, as buildings have become better insulated, with increasingly strict regulation, so thermal bridges that might previously have been considered insignificant in terms of the overall thermal performance of a building, can actually be the cause of considerable thermal inefficiency. There is the potential for such inefficiency at every opening and every junction (even in party walls).

−	Thermal bridges can be categorised as ~~‘repeating’~~ for example where wall ties regularly bridge the cavity, or ~~‘non~~-~~repeating’~~ such as a wall junction or lintel.	+	Thermal bridges can be categorised as 'repeating' for example where wall ties regularly bridge the cavity, or 'non-repeating' such as a wall junction or lintel.

−	The Approved Documents to Part L of the building regulations (Conservation of fuel and power) state that ~~‘The~~ building fabric should be constructed so that there are no reasonably avoidable thermal bridges in the insulation layers caused by gaps within the various elements, at the joints between elements and at the edges of elements such as those around window and door openings.’ They require that where unaccredited construction details are used, generic linear thermal bridge values must be increased by levels (depending on the building type) set out in the Approved Documents for the calculations of building emission rates (BER) or dwelling emission rates (DER).	+	The Approved Documents to Part L of the building regulations (Conservation of fuel and power) state that 'The building fabric should be constructed so that there are no reasonably avoidable thermal bridges in the insulation layers caused by gaps within the various elements, at the joints between elements and at the edges of elements such as those around window and door openings.' They require that where unaccredited construction details are used, generic linear thermal bridge values must be increased by levels (depending on the building type) set out in the Approved Documents for the calculations of building emission rates (BER) or dwelling emission rates (DER).

	Thermal bridges in completed buildings can be revealed with thermal imaging cameras (see Thermographic survey), but they can be very difficult to rectify, particularly if they are repeated throughout a building.		Thermal bridges in completed buildings can be revealed with thermal imaging cameras (see Thermographic survey), but they can be very difficult to rectify, particularly if they are repeated throughout a building.
Line 19:		Line 19:
	* Accredited construction details ACDs.		* Accredited construction details ACDs.
	* Air tightness in buildings.		* Air tightness in buildings.
		+	* Building fabric.
	* Cavity wall.		* Cavity wall.
	* Co-heating test.		* Co-heating test.