Equilibrium moisture content EMC - Revision history

Designing Buildings at 10:32, 31 October 2022

2022-10-31T10:32:28Z

← Older revision		Revision as of 10:32, 31 October 2022
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	Equilibrium Moisture Content (EMC) refers to the specific state of a hygroscopic material in relation to its moisture content, and relative to its surrounding environment. It is the point at which the material is neither gaining nor losing moisture and remains in balance or equilibrium with its local environment. The value of the EMC depends on the material being described, as well as the relative humidity and the temperature of its surrounding environment or the air within which it is in contact.		Equilibrium Moisture Content (EMC) refers to the specific state of a hygroscopic material in relation to its moisture content, and relative to its surrounding environment. It is the point at which the material is neither gaining nor losing moisture and remains in balance or equilibrium with its local environment. The value of the EMC depends on the material being described, as well as the relative humidity and the temperature of its surrounding environment or the air within which it is in contact.

−	For example, wood is a hygroscopic material, so its moisture levels can rise and fall relative to its local environment. In timber the EMC is most likely to be lower than its Fibre Saturation Point (FSP) which is generally around hen 30%. The exact EMC figure will vary depending on a number of variables which include the type and age of the wood, the area in the cross section of timber and the moisture and temperature of the local environment.	+	For example, wood is a hygroscopic material, so its moisture levels can rise and fall relative to its local environment. In timber the EMC is most likely to be lower than its Fibre Saturation Point (FSP) which is generally around hen 30%. The exact EMC figure will vary depending on a number of variables which include the type and age of the wood, the area in the cross section of timber and the moisture and temperature of the local environment. For more information see: Fibre saturation point.

	This characteristic of hygroscopic materials to help balance moisture and temperature levels can be beneficial to internal environments when left exposed internally.		This characteristic of hygroscopic materials to help balance moisture and temperature levels can be beneficial to internal environments when left exposed internally.

Designing Buildings at 10:28, 31 October 2022

2022-10-31T10:28:55Z

← Older revision		Revision as of 10:28, 31 October 2022
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	* Electrical resistance meters.		* Electrical resistance meters.
	* Electromagnetic.		* Electromagnetic.
		+	* Fibre saturation point.
	* Humidity.		* Humidity.
	* Moisture.		* Moisture.

Designing Buildings at 10:27, 31 October 2022

2022-10-31T10:27:47Z

← Older revision		Revision as of 10:27, 31 October 2022
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−	~~Equilibrium~~ Moisture ~~Content (EMC) refers to~~ the ~~specific state of a hygroscopic material~~ in ~~relation to its~~ moisture content~~. and relative to its surrounding environment. It is the point~~ at which ~~the~~ material is neither gaining nor losing moisture ~~and remains in balance or equilibrium~~ with ~~its local environment. The value of~~ the ~~EMC depends on the material being described, aswell as the relative humidity and the temperature of its surrounding~~ environment ~~or the air within which it is in contact~~.	+	[https://www.historicenvironment.scot/archives-and-research/publications/publication/?publicationId=1122c09b-8c2b-442b-8bfd-accd0117b1ef Technical paper 35: Moisture measurement in the historic environment], published by Historic Environment Scotland in 2021, defines equilibrium moisture content as: ‘The moisture content at which a material is neither gaining nor losing moisture through exchanges with the ambient environment.’

−	By example wood is a hygroscopic material, so its moisture levels can ~~increase~~ and ~~lower~~ relative to its ~~localised~~ environment~~, in~~ timber the EMC is most likely to be lower than its Fibre Saturation Point (FSP) which is generally around hen 30%MC. The exact EMC figure will vary depending on a number of variables which include the type and age of the wood, the area in the cross section of timber and ~~finally~~ the moisture and temperature of the local environment. This characteristic of hygroscopic materials to help balance moisture and temperature levels can be ~~benefitial~~ to internal environments when left exposed internally.	+	Equilibrium Moisture Content (EMC) refers to the specific state of a hygroscopic material in relation to its moisture content, and relative to its surrounding environment. It is the point at which the material is neither gaining nor losing moisture and remains in balance or equilibrium with its local environment. The value of the EMC depends on the material being described, as well as the relative humidity and the temperature of its surrounding environment or the air within which it is in contact.
		+
		+	For example, wood is a hygroscopic material, so its moisture levels can rise and fall relative to its local environment. In timber the EMC is most likely to be lower than its Fibre Saturation Point (FSP) which is generally around hen 30%. The exact EMC figure will vary depending on a number of variables which include the type and age of the wood, the area in the cross section of timber and the moisture and temperature of the local environment.
		+
		+	This characteristic of hygroscopic materials to help balance moisture and temperature levels can be beneficial to internal environments when left exposed internally.

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

−	* ~~Moisture content MC~~.	+	* Assessing moisture in porous building materials.
−	* ~~Mould growth~~.	+	* Calcium carbide meter.
−	* ~~Recognising wood rot and insect damage in buildings~~.	+	* Damp.
−	* ~~Sacrificial timber~~.	+	* Dew point.
−	* ~~Timber~~.	+	* Electromagnetic meters.
−	* ~~Timber preservation~~	+	* Electrical resistance meters.
		+	* Electromagnetic.
		+	* Humidity.
		+	* Moisture.
	* Types of water.		* Types of water.
−	* Ventilation.
−	* Wall insulation and moisture risk.
−	* Water.
	* Water vapour.		* Water vapour.
−	* ~~Wet rot~~.	+	* Water.

	[[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:DCN_Specification]] [[Category:Definitions]] [[Category:Standards_/_measurements]]		[[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:DCN_Specification]] [[Category:Definitions]] [[Category:Standards_/_measurements]]

Editor at 12:56, 7 October 2022

2022-10-07T12:56:19Z

← Older revision		Revision as of 12:56, 7 October 2022
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	By example wood is a hygroscopic material, so its moisture levels can increase and lower relative to its localised environment, in timber the EMC is most likely to be lower than its Fibre Saturation Point (FSP) which is generally around hen 30%MC. The exact EMC figure will vary depending on a number of variables which include the type and age of the wood, the area in the cross section of timber and finally the moisture and temperature of the local environment. This characteristic of hygroscopic materials to help balance moisture and temperature levels can be benefitial to internal environments when left exposed internally.		By example wood is a hygroscopic material, so its moisture levels can increase and lower relative to its localised environment, in timber the EMC is most likely to be lower than its Fibre Saturation Point (FSP) which is generally around hen 30%MC. The exact EMC figure will vary depending on a number of variables which include the type and age of the wood, the area in the cross section of timber and finally the moisture and temperature of the local environment. This characteristic of hygroscopic materials to help balance moisture and temperature levels can be benefitial to internal environments when left exposed internally.

−	Related articles on Designing Buildings	+	= Related articles on Designing Buildings =

−	Moisture content MC.	+	* Moisture content MC.
−		+	* Mould growth.
−	Mould growth.	+	* Recognising wood rot and insect damage in buildings.
−		+	* Sacrificial timber.
−	Recognising wood rot and insect damage in buildings.	+	* Timber.
−		+	* Timber preservation
−	Sacrificial timber.	+	* Types of water.
−		+	* Ventilation.
−	Timber.	+	* Wall insulation and moisture risk.
−		+	* Water.
−	Timber preservation	+	* Water vapour.
−		+	* Wet rot.
−	Types of water.	+
−		+
−	Ventilation.	+
−		+
−	Wall insulation and moisture risk.	+
−		+
−	Water.	+
−		+
−	Water vapour.	+
−		+
−	Wet rot.	+

	[[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:DCN_Specification]] [[Category:Definitions]] [[Category:Standards_/_measurements]]		[[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:DCN_Specification]] [[Category:Definitions]] [[Category:Standards_/_measurements]]

Editor at 12:55, 7 October 2022

2022-10-07T12:55:54Z

← Older revision		Revision as of 12:55, 7 October 2022
Line 1:		Line 1:
	Equilibrium Moisture Content (EMC) refers to the specific state of a hygroscopic material in relation to its moisture content. and relative to its surrounding environment. It is the point at which the material is neither gaining nor losing moisture and remains in balance or equilibrium with its local environment. The value of the EMC depends on the material being described, aswell as the relative humidity and the temperature of its surrounding environment or the air within which it is in contact.		Equilibrium Moisture Content (EMC) refers to the specific state of a hygroscopic material in relation to its moisture content. and relative to its surrounding environment. It is the point at which the material is neither gaining nor losing moisture and remains in balance or equilibrium with its local environment. The value of the EMC depends on the material being described, aswell as the relative humidity and the temperature of its surrounding environment or the air within which it is in contact.

−	By example wood is a hygroscopic material, so its moisture levels can ~~relate~~ to its localised environment, in timber the EMC is likely to be lower than its Fibre Saturation Point ~~hen wood is at the~~ FSP of 30% ~~further drying is less likely to cause significant deformation~~ and ~~therefore considered more stable or predictable~~ in ~~terms~~ of ~~being worked with~~.	+	By example wood is a hygroscopic material, so its moisture levels can increase and lower relative to its localised environment, in timber the EMC is most likely to be lower than its Fibre Saturation Point (FSP) which is generally around hen 30%MC. The exact EMC figure will vary depending on a number of variables which include the type and age of the wood, the area in the cross section of timber and finally the moisture and temperature of the local environment. This characteristic of hygroscopic materials to help balance moisture and temperature levels can be benefitial to internal environments when left exposed internally.

−	~~The point at which timber stabilises in balance with the moisture of its own environment (which is normally below the FSP) is referred to as Equilibrium~~ Moisture ~~Content (EMC)~~. ~~This figure will vary depending on the species but more importantly with the moisture~~ and ~~temperature of the local environment, this hygroscopic characteristic of~~ timber ~~can be benefitial to internal environments when exposed internally~~.	+	Related articles on Designing Buildings
		+
		+	Moisture content MC.
		+
		+	Mould growth.
		+
		+	Recognising wood rot and insect damage in buildings.
		+
		+	Sacrificial timber.
		+
		+	Timber.
		+
		+	Timber preservation
		+
		+	Types of water.
		+
		+	Ventilation.
		+
		+	Wall insulation and moisture risk.
		+
		+	Water.
		+
		+	Water vapour.
		+
		+	Wet rot.
		+
		+	[[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:DCN_Specification]] [[Category:Definitions]] [[Category:Standards_/_measurements]]

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Equilibrium Moisture Content (EMC) refers to the specific state of a hygroscopic material in relation to its moisture content. and relative to its surrounding environment. It is the point at which the material is neither gaining nor losing moisture and remains in balance or equilibrium with its local environment. The value of the EMC depends on the material being described, aswell as the relative humidity and the temperature of its surrounding environment or the air within which it is in contact.

By example wood is a hygroscopic material, so its moisture levels can relate to its localised environment, in timber the EMC is likely to be lower than its Fibre Saturation Point hen wood is at the FSP of 30% further drying is less likely to cause significant deformation and therefore considered more stable or predictable in terms of being worked with.

The point at which timber stabilises in balance with the moisture of its own environment (which is normally below the FSP) is referred to as Equilibrium Moisture Content (EMC). This figure will vary depending on the species but more importantly with the moisture and temperature of the local environment, this hygroscopic characteristic of timber can be benefitial to internal environments when exposed internally.