Metal composite material - Revision history

Editor at 16:25, 9 September 2024

2024-09-09T16:25:29Z

← Older revision		Revision as of 16:25, 9 September 2024
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	Metal composite materials are defined in approved document B of the building regulations as: '...any panel or sheet, having a thickness of no more than 10mm which is composed of a number of layers two or more of which are made of metal, alloy or metal compound and one or more of which is a substantial layer made of a material having a gross calorific value of more than 35MJ/kg when tested in accordance with BS EN ISO 1716. A substantial layer is defined as a layer which is at least 1mm thick or has a mass per unit area of at least 1kg/m².'		Metal composite materials are defined in approved document B of the building regulations as: '...any panel or sheet, having a thickness of no more than 10mm which is composed of a number of layers two or more of which are made of metal, alloy or metal compound and one or more of which is a substantial layer made of a material having a gross calorific value of more than 35MJ/kg when tested in accordance with BS EN ISO 1716. A substantial layer is defined as a layer which is at least 1mm thick or has a mass per unit area of at least 1kg/m².'

−	For more information see: ACM cladding.	+	For more information see: Metal composite material panel systems MCM and MCP and ACM cladding.

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

Designing Buildings at 08:32, 2 June 2022

2022-06-02T08:32:14Z

← Older revision		Revision as of 08:32, 2 June 2022
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−	On 1 June 2022, the government introduced a ban on the use of ~~Metal Composite Material~~ (MCM) panels with unmodified polyethylene (PE) core on all new buildings at any height. This is the type of cladding that was used on Grenfell Tower.	+	On 1 June 2022, the government introduced a ban on the use of metal composite material (MCM) panels with unmodified polyethylene (PE) core on all new buildings at any height. This is the type of cladding that was used on Grenfell Tower.

	Research published by the [https://www.gov.uk/government/publications/fire-performance-of-cladding-materials-research Department in April 2020] demonstrated that this type of MCM PE poses such a significant fire risk that an outright ban on its use on any buildings, regardless of height or purpose, is justified.		Research published by the [https://www.gov.uk/government/publications/fire-performance-of-cladding-materials-research Department in April 2020] demonstrated that this type of MCM PE poses such a significant fire risk that an outright ban on its use on any buildings, regardless of height or purpose, is justified.

−	The cladding used on Grenfell Tower was actually aluminium composite material (ACM) with an unmodified polyethylene core (~~called~~ ACM PE, or ~~‘ACM~~ category 3’). MCM PE includes any metal, alloy or metal compound.	+	The cladding used on Grenfell Tower was actually aluminium composite material (ACM) with an unmodified polyethylene core (ACM PE, or ACM category 3). MCM PE includes any metal, alloy or metal compound.

−	~~Relevant metal~~ composite materials are defined (in ~~regulation 2(6)(c))~~ as any panel or sheet, having a thickness of no more than 10mm which is composed of a number of layers two or more of which are made of metal, alloy or metal compound and one or more of which is a substantial layer made of a material having a gross calorific value of more than 35MJ/kg when tested in accordance with BS EN ISO 1716. A substantial layer is defined as a layer which is at least 1mm thick or has a mass per unit area of at least 1kg/m².	+	Metal composite materials are defined in approved document B of the building regulations as: '...any panel or sheet, having a thickness of no more than 10mm which is composed of a number of layers two or more of which are made of metal, alloy or metal compound and one or more of which is a substantial layer made of a material having a gross calorific value of more than 35MJ/kg when tested in accordance with BS EN ISO 1716. A substantial layer is defined as a layer which is at least 1mm thick or has a mass per unit area of at least 1kg/m².'

	For more information see: ACM cladding.		For more information see: ACM cladding.

Designing Buildings: Created page with "On 1 June 2022, the government introduced a ban on the use of Metal Composite Material (MCM) panels with unmodified polyethylene (PE) core on all new buildings at any height. Thi..."

2022-06-02T08:27:47Z

Created page with "On 1 June 2022, the government introduced a ban on the use of Metal Composite Material (MCM) panels with unmodified polyethylene (PE) core on all new buildings at any height. Thi..."

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On 1 June 2022, the government introduced a ban on the use of Metal Composite Material (MCM) panels with unmodified polyethylene (PE) core on all new buildings at any height. This is the type of cladding that was used on Grenfell Tower.

Research published by the [https://www.gov.uk/government/publications/fire-performance-of-cladding-materials-research Department in April 2020] demonstrated that this type of MCM PE poses such a significant fire risk that an outright ban on its use on any buildings, regardless of height or purpose, is justified.

The cladding used on Grenfell Tower was actually aluminium composite material (ACM) with an unmodified polyethylene core (called ACM PE, or ‘ACM category 3’). MCM PE includes any metal, alloy or metal compound.

Relevant metal composite materials are defined (in regulation 2(6)(c)) as any panel or sheet, having a thickness of no more than 10mm which is composed of a number of layers two or more of which are made of metal, alloy or metal compound and one or more of which is a substantial layer made of a material having a gross calorific value of more than 35MJ/kg when tested in accordance with BS EN ISO 1716. A substantial layer is defined as a layer which is at least 1mm thick or has a mass per unit area of at least 1kg/m².

For more information see: ACM cladding.

= Related articles on Designing Buildings =

* 2022 changes to fire safety guidance and building regulations
* Approved document B.
* Building regulations.
* Building Safety Act.
* Fire and rescue service.
* Fire Safety Act.
* Fire.
* Grenfell Tower articles.
* Grenfell Tower fire.
* Grenfell Tower Inquiry.
* Hackitt review.

[[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:Definitions]] [[Category:Products_/_components]]