Building damp-free cavity walls - Revision history

Designing Buildings at 07:35, 12 November 2020

2020-11-12T07:35:57Z

← Older revision		Revision as of 07:35, 12 November 2020
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	[https://www.brebookshop.com/details.jsp?id=327517 Building damp-free cavity walls (GG 33 revised)] was written by Barry Reeves and Chris Scivyer and published by BRE on 18 March 2015.		[https://www.brebookshop.com/details.jsp?id=327517 Building damp-free cavity walls (GG 33 revised)] was written by Barry Reeves and Chris Scivyer and published by BRE on 18 March 2015.

−	[[File:~~Building damp free cavity walls GG 33~~.png\|link=https://www.brebookshop.com/details.jsp?id=327516]]	+	[[File:Building_damp_free_cavity_walls_GG_33.png\|link=https://www.brebookshop.com/details.jsp?id=327516]]

	In driving rain, water leaks through the outer leaf of most cavity walls, often in quite large quantities. Provided the damp-proofing measures are correctly designed and installed and the wall itself is reasonably free from defects, this water does not reach the inner leaf, but flows harmlessly down the cavity face of the outer leaf until it reaches the footings or is directed out of the cavity via cavity trays or window/door lintels.		In driving rain, water leaks through the outer leaf of most cavity walls, often in quite large quantities. Provided the damp-proofing measures are correctly designed and installed and the wall itself is reasonably free from defects, this water does not reach the inner leaf, but flows harmlessly down the cavity face of the outer leaf until it reaches the footings or is directed out of the cavity via cavity trays or window/door lintels.
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	* Weep hole.		* Weep hole.

−	[[Category:Publications_/_reports]] [[Category:Theory]] [[Category:Construction_techniques]] [[Category:Design]]	+	[[Category:DCN_Guidance]] [[Category:DCN_Report]] [[Category:DCN_Research,_Development_and_Innovation]] [[Category:Publications_/_reports]] [[Category:Theory]] [[Category:Construction_techniques]] [[Category:Design]]

Designing Buildings at 07:53, 16 June 2018

2018-06-16T07:53:04Z

← Older revision		Revision as of 07:53, 16 June 2018
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	[https://www.brebookshop.com/details.jsp?id=327517 Building damp-free cavity walls (GG 33 revised)] was written by Barry Reeves and Chris Scivyer and published by BRE on 18 March 2015.		[https://www.brebookshop.com/details.jsp?id=327517 Building damp-free cavity walls (GG 33 revised)] was written by Barry Reeves and Chris Scivyer and published by BRE on 18 March 2015.
		+
		+	[[File:Building damp free cavity walls GG 33.png\|link=https://www.brebookshop.com/details.jsp?id=327516]]

	In driving rain, water leaks through the outer leaf of most cavity walls, often in quite large quantities. Provided the damp-proofing measures are correctly designed and installed and the wall itself is reasonably free from defects, this water does not reach the inner leaf, but flows harmlessly down the cavity face of the outer leaf until it reaches the footings or is directed out of the cavity via cavity trays or window/door lintels.		In driving rain, water leaks through the outer leaf of most cavity walls, often in quite large quantities. Provided the damp-proofing measures are correctly designed and installed and the wall itself is reasonably free from defects, this water does not reach the inner leaf, but flows harmlessly down the cavity face of the outer leaf until it reaches the footings or is directed out of the cavity via cavity trays or window/door lintels.

−	However, even though many cavity wall details are long-established and designed with the express purpose that the inner leaf stays dry, dampness is still a common problem ~~in modern buildings~~. This is generally due to faulty design or construction of damp-proofing measures or the wrong choice of materials.	+	However, even though many cavity wall details are long-established and designed with the express purpose that the inner leaf stays dry, dampness is still a common problem. This is generally due to faulty design or construction of damp-proofing measures or the wrong choice of materials.

−	This 6-page Good Building Guide replaces guidance published in 1999, and offers advice about how to ensure new cavity walls do not suffer from damp. It is intended for architects and designers, engineers, site managers, house builders and masonry contractors.	+	This 6-page Good Building Guide replaces guidance published in 1999, and offers advice about how to ensure new cavity walls do not suffer from damp. It is intended for architects and other designers, engineers, site managers, house builders and masonry contractors.

	Its contents are:		Its contents are:

−	* Introduction	+	* Introduction.
−	* Defects in the outer leaf	+	* Defects in the outer leaf.
−	* Problems caused by wall ties	+	* Problems caused by wall ties.
−	* Defects linked to cavity insulation	+	* Defects linked to cavity insulation.
−	* Where damp-proof courses and cavity trays are needed	+	* Where damp-proof courses and cavity trays are needed.
−	* Installing damp-proof courses	+	* Installing damp-proof courses.
−	* Installing cavity trays	+	* Installing cavity trays.
−	* Weepholes	+	* Weepholes.
−	* Conclusion	+	* Conclusion.
−	* References	+	* References.
−	* Further reading	+	* Further reading.
		+
		+	--[[User:BRE_Group\|BRE Group]]

	= Find out more. =		= Find out more. =
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	* BREEAM.		* BREEAM.
	* Building Research Establishment.		* Building Research Establishment.
−	* ~~Condensation~~.	+	* Cavity tray.
		+	* Cavity wall.
	* Damp in buildings.		* Damp in buildings.
	* Damp proof membrane.		* Damp proof membrane.
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	* Dew point.		* Dew point.
	* Diagnosing the causes of dampness (GR 5 revised).		* Diagnosing the causes of dampness (GR 5 revised).
−	* Dry rot fungus.
−	* Efflorescence.
−	* Humidity.
−	* Interstitial condensation.
	* Penetrating damp.		* Penetrating damp.
−	* Rising damp in walls - diagnosis and treatment (DG 245).
−	* Rising damp.
−	* Spalling.
	* Understanding dampness.		* Understanding dampness.
−	* Wall ~~insulation and moisture risk~~.	+	* Wall ties.
		+	* Weep hole.

	[[Category:Publications_/_reports]] [[Category:Theory]] [[Category:Construction_techniques]] [[Category:Design]]		[[Category:Publications_/_reports]] [[Category:Theory]] [[Category:Construction_techniques]] [[Category:Design]]

Designing Buildings: Created page with "BRE (Building Research Establishment) is an independent, research-based consultancy, testing and training organisation, operating in the built environment and associated industri..."

2018-06-16T07:49:15Z

Created page with "BRE (Building Research Establishment) is an independent, research-based consultancy, testing and training organisation, operating in the built environment and associated industri..."

New page

BRE (Building Research Establishment) is an independent, research-based consultancy, testing and training organisation, operating in the built environment and associated industries.

[https://www.brebookshop.com/details.jsp?id=327517 Building damp-free cavity walls (GG 33 revised)] was written by Barry Reeves and Chris Scivyer and published by BRE on 18 March 2015.

In driving rain, water leaks through the outer leaf of most cavity walls, often in quite large quantities. Provided the damp-proofing measures are correctly designed and installed and the wall itself is reasonably free from defects, this water does not reach the inner leaf, but flows harmlessly down the cavity face of the outer leaf until it reaches the footings or is directed out of the cavity via cavity trays or window/door lintels.

However, even though many cavity wall details are long-established and designed with the express purpose that the inner leaf stays dry, dampness is still a common problem in modern buildings. This is generally due to faulty design or construction of damp-proofing measures or the wrong choice of materials.

This 6-page Good Building Guide replaces guidance published in 1999, and offers advice about how to ensure new cavity walls do not suffer from damp. It is intended for architects and designers, engineers, site managers, house builders and masonry contractors.

Its contents are:

* Introduction
* Defects in the outer leaf
* Problems caused by wall ties
* Defects linked to cavity insulation
* Where damp-proof courses and cavity trays are needed
* Installing damp-proof courses
* Installing cavity trays
* Weepholes
* Conclusion
* References
* Further reading

= Find out more. =

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

* BRE articles on Designing Buildings Wiki.
* BRE Buzz articles on Designing Buildings Wiki.
* BRE Buzz.
* BREEAM.
* Building Research Establishment.
* Condensation.
* Damp in buildings.
* Damp proof membrane.
* Damp proofing.
* Damp-proof course.
* Dew point.
* Diagnosing the causes of dampness (GR 5 revised).
* Dry rot fungus.
* Efflorescence.
* Humidity.
* Interstitial condensation.
* Penetrating damp.
* Rising damp in walls - diagnosis and treatment (DG 245).
* Rising damp.
* Spalling.
* Understanding dampness.
* Wall insulation and moisture risk.

[[Category:Publications_/_reports]] [[Category:Theory]] [[Category:Construction_techniques]] [[Category:Design]]