Zinc in construction - Revision history

Designing Buildings at 07:54, 12 January 2022

2022-01-12T07:54:16Z

← Older revision		Revision as of 07:54, 12 January 2022
Line 57:		Line 57:
	* Steel.		* Steel.
	* The Iron Bridge.		* The Iron Bridge.
		+	* Types of metal.
	* Types of steel.		* Types of steel.
	* Wrought iron.		* Wrought iron.

	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Education]] [[Category:Construction_techniques]] [[Category:Design]] [[Category:Products_/_components]]		[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Education]] [[Category:Construction_techniques]] [[Category:Design]] [[Category:Products_/_components]]

Editor at 18:10, 16 November 2021

2021-11-16T18:10:05Z

← Older revision		Revision as of 18:10, 16 November 2021
Line 37:		Line 37:
	Substrates other than ply can be used, such as insulated metal-faced panels, rigid insulation and cellular glass foam. Accessories such as zinc roof vents, finials, gutters and downpipes are normally used in conjunction with zinc roofs. Zinc tiles, usually diamond-shaped, can also be used for cladding facades.		Substrates other than ply can be used, such as insulated metal-faced panels, rigid insulation and cellular glass foam. Accessories such as zinc roof vents, finials, gutters and downpipes are normally used in conjunction with zinc roofs. Zinc tiles, usually diamond-shaped, can also be used for cladding facades.

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

	* Aluminium.		* Aluminium.
		+	* Brass.
	* Cast iron.		* Cast iron.
	* Copper.		* Copper.

Editor at 19:14, 6 July 2021

2021-07-06T19:14:36Z

← Older revision		Revision as of 19:14, 6 July 2021
Line 52:		Line 52:
	* Metal fabrication.		* Metal fabrication.
	* Metal profile cladding		* Metal profile cladding
−	* Metal roofing	+	* Metal roofing.
		+	* Spangle.
	* Steel.		* Steel.
	* The Iron Bridge.		* The Iron Bridge.

Editor at 17:37, 5 July 2021

2021-07-05T17:37:49Z

← Older revision		Revision as of 17:37, 5 July 2021
Line 44:		Line 44:
	* Difference between cast iron and wrought iron.		* Difference between cast iron and wrought iron.
	* Failure of cast iron beams.		* Failure of cast iron beams.
		+	* Galvanising.
	* Iron.		* Iron.
	* Ironwork.		* Ironwork.

Designing Buildings at 07:37, 2 December 2020

2020-12-02T07:37:32Z

← Older revision		Revision as of 07:37, 2 December 2020
Line 57:		Line 57:
	* Wrought iron.		* Wrought iron.

−	[[Category:~~Education~~]] [[Category:~~DCN_Education_and_Training~~]] [[Category:~~Construction_techniques~~]] [[Category:~~Design~~]] [[Category:~~Products_/_components~~]] [[Category:~~DCN_Product_Knowledge~~]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Education]] [[Category:Construction_techniques]] [[Category:Design]] [[Category:Products_/_components]]

Designing Buildings: moved Zinc to Zinc in construction

2019-03-07T12:45:58Z

moved Zinc to Zinc in construction

← Older revision

Revision as of 12:45, 7 March 2019

Designing Buildings at 12:45, 7 March 2019

2019-03-07T12:45:47Z

← Older revision		Revision as of 12:45, 7 March 2019
Line 1:		Line 1:
−	= [[File:Zinc_downpipe.jpg\|link=File:Zinc_downpipe.jpg]] =	+	[[File:Zinc_downpipe.jpg\|link=File:Zinc_downpipe.jpg]]

	= Introduction =		= Introduction =
Line 5:		Line 5:
	Zinc (symbol Zn) is a naturally occurring element, the first in Group 12 of the periodic table. After aluminium, iron and copper, it is the fourth most-used metal in the world, with a market of US$40 bn and is the 24th most abundant element in the earth’s crust. It is found primarily as zinc ore and occurs mainly in Australia, Asia and the US. Before it can be used, it must be extracted from the ore using electricity.		Zinc (symbol Zn) is a naturally occurring element, the first in Group 12 of the periodic table. After aluminium, iron and copper, it is the fourth most-used metal in the world, with a market of US$40 bn and is the 24th most abundant element in the earth’s crust. It is found primarily as zinc ore and occurs mainly in Australia, Asia and the US. Before it can be used, it must be extracted from the ore using electricity.

−	Zinc was known to the ancient Romans and Greeks, but was not produced in significant quantities until the 12th century. Its main use today is as a corrosion-resistant plating for steel (hot-dip galvanising) but other applications ~~including~~ batteries, non-structural castings and alloys	+	Zinc was known to the ancient Romans and Greeks, but was not produced in significant quantities until the 12th century. Its main use today is as a corrosion-resistant plating for steel (hot-dip galvanising) but other applications include batteries, non-structural castings and alloys.

	= Environmental qualities =		= Environmental qualities =

−	Humans, animals and plant life need zinc to function. It is important for healthy growth and brain development and strengthens the immune system; it is therefore vital for life. As it tends to be non-toxic, zinc can be taken in vitamin form.	+	Humans, animals and plant life need zinc to function. It is important for healthy growth and brain development and strengthens the immune system; it is therefore vital for life. As it tends to be non-toxic, zinc can be taken in vitamin form. It is also added to fertilisers and can help increase crop yields and nutrition quality. Recently, the United Nations designated zinc a ‘life-saving commodity’.

−	~~Like aluminium,~~ zinc can be easily recycled and maintains its physical properties~~. It is also added to fertilisers and can help increase crop yields and nutrition quality. Recently, the United Nations designated zinc a ‘life-saving commodity’~~.	+	Used as a meterial zinc can be easily recycled and maintains its physical properties.

	= Building construction =		= Building construction =
Line 21:		Line 21:
	= Roll-cap method =		= Roll-cap method =

−	This is the traditional system that has been used by skilled craftsmen in continental Europe and requires no complicated tools or procedures. The roof is divided into longitudinal bays (parallel to the slope) by trapezoidal-shaped timber battens with sloping sides. Zinc sheet (typically 400-500mm wide) with upstands on either side is cut to size to fit within each bay, the upstands abutting the timber battens ~~and~~ secured in place with concealed clips. Zinc capping pieces are placed over the battens to cap the upstands and create a weathertight finish.	+	This is the traditional system that has been used by skilled craftsmen in continental Europe and requires no complicated tools or procedures. The roof is divided into longitudinal bays (parallel to the slope) by trapezoidal-shaped timber battens with sloping sides. Zinc sheet (typically 400-500mm wide) with upstands on either side is cut to size to fit within each bay, the upstands abutting the timber battens are secured in place with concealed clips. Zinc capping pieces are placed over the battens to cap the upstands and create a weathertight finish.

	= Standing seam method =		= Standing seam method =
Line 29:		Line 29:
	= Warm roof or cold roof? =		= Warm roof or cold roof? =

−	Traditionally, especially in France, Belgium and Germany, zinc sheet has been applied to a cold roof, where the insulation (if it existed at all) was immediately above the ceiling level and the roof was therefore ‘cold’ (usually with ~~copious~~ ventilation in the roof void). Also, the zinc was applied directly to a deck of close-boarded timber planks with gaps of around 10mm in between. This had the effect of ensuring adequate ventilation to the underside of the zinc, ensuring a service life in excess of 100 years.	+	Traditionally, especially in France, Belgium and Germany, zinc sheet has been applied to a cold roof, where the insulation (if it existed at all) was immediately above the ceiling level and the roof was therefore ‘cold’ (usually with ventilation in the roof void). Also, the zinc was applied directly to a deck of close-boarded timber planks with gaps of around 10mm in between. This had the effect of ensuring adequate ventilation to the underside of the zinc, ensuring a service life in excess of 100 years.

−	Modern construction has tended to favour ‘warm’ roof constructions where the insulation is typically in or above the roof structure, and with an inadequately ventilated roof space. This, taken with the fact that the zinc may have been laid on continuous ply with no ventilation gaps, could lead to condensation and consequent corrosion on the zinc underside and therefore a reduced service life.	+	Modern construction has tended to favour ‘warm’ roof constructions where the insulation is typically in or above the roof structure, and sometimes with an inadequately ventilated roof space. This, taken with the fact that the zinc may have been laid on continuous ply with no ventilation gaps, could lead to condensation and consequent corrosion on the zinc underside and therefore a reduced service life.

	When the zinc is to be laid on a continuous substrate (eg 18mm plywood sheets with no ventilation gaps), contemporary practice typically installs a continuous, self-sealing vapour barrier and breather membrane to prevent moisture from condensing on the underside of the zinc.		When the zinc is to be laid on a continuous substrate (eg 18mm plywood sheets with no ventilation gaps), contemporary practice typically installs a continuous, self-sealing vapour barrier and breather membrane to prevent moisture from condensing on the underside of the zinc.
Line 57:		Line 57:
	* Wrought iron.		* Wrought iron.

−	[[Category:Education]] [[Category:Construction_techniques]] [[Category:Design]] [[Category:Products_/_components]]	+	[[Category:Education]] [[Category:DCN_Education_and_Training]] [[Category:Construction_techniques]] [[Category:Design]] [[Category:Products_/_components]] [[Category:DCN_Product_Knowledge]]

Editor at 18:56, 6 March 2019

2019-03-06T18:56:03Z

← Older revision		Revision as of 18:56, 6 March 2019
Line 1:		Line 1:
−	= [[File:~~Zinc downpipe~~.jpg]] =	+	= [[File:Zinc_downpipe.jpg\|link=File:Zinc_downpipe.jpg]] =

	= Introduction =		= Introduction =
Line 46:		Line 46:
	* Iron.		* Iron.
	* Ironwork.		* Ironwork.
		+	* Lead.
	* Mesh mould metal.		* Mesh mould metal.
	* Metal composite panels.		* Metal composite panels.

Editor at 16:58, 28 February 2019

2019-02-28T16:58:34Z

← Older revision		Revision as of 16:58, 28 February 2019
Line 1:		Line 1:
		+	= [[File:Zinc downpipe.jpg]] =
		+
	= Introduction =		= Introduction =

Editor: Created page with "= Introduction = Zinc (symbol Zn) is a naturally occurring element, the first in Group 12 of the periodic table. After aluminium, iron and copper, it is the fourth most-used met..."

2019-02-28T16:46:23Z

Created page with "= Introduction = Zinc (symbol Zn) is a naturally occurring element, the first in Group 12 of the periodic table. After aluminium, iron and copper, it is the fourth most-used met..."

New page

= Introduction =

Zinc (symbol Zn) is a naturally occurring element, the first in Group 12 of the periodic table. After aluminium, iron and copper, it is the fourth most-used metal in the world, with a market of US$40 bn and is the 24th most abundant element in the earth’s crust. It is found primarily as zinc ore and occurs mainly in Australia, Asia and the US. Before it can be used, it must be extracted from the ore using electricity.

Zinc was known to the ancient Romans and Greeks, but was not produced in significant quantities until the 12th century. Its main use today is as a corrosion-resistant plating for steel (hot-dip galvanising) but other applications including batteries, non-structural castings and alloys

= Environmental qualities =

Humans, animals and plant life need zinc to function. It is important for healthy growth and brain development and strengthens the immune system; it is therefore vital for life. As it tends to be non-toxic, zinc can be taken in vitamin form.

Like aluminium, zinc can be easily recycled and maintains its physical properties. It is also added to fertilisers and can help increase crop yields and nutrition quality. Recently, the United Nations designated zinc a ‘life-saving commodity’.

= Building construction =

Since the 18th century, zinc has been commonly used in France, Belgium, Germany, Holland and other European countries as a building material for covering roofs and facades, as well as for gutters and downpipes. When laid correctly as a roof covering, it has lasted in excess of 100 years.

For construction applications, the zinc used is usually in sheet form of 99.9%+ purity but with very small concentrations of titanium and copper. It is typically applied in sheet thicknesses of 0.7mm. The two main application methods are roll-cap (the traditional method) and standing seam.

= Roll-cap method =

This is the traditional system that has been used by skilled craftsmen in continental Europe and requires no complicated tools or procedures. The roof is divided into longitudinal bays (parallel to the slope) by trapezoidal-shaped timber battens with sloping sides. Zinc sheet (typically 400-500mm wide) with upstands on either side is cut to size to fit within each bay, the upstands abutting the timber battens and secured in place with concealed clips. Zinc capping pieces are placed over the battens to cap the upstands and create a weathertight finish.

= Standing seam method =

This system uses a mechanical welting machine. Zinc sheets with around 50mm upstands on each side are placed parallel to the roof slope (so rain can travel down the roof). Clips fastened to the roof deck are folded around the upstands. A welting machine is run along two adjacent upstands to produce a welt, folding together the upstands and clips and forming a discreet, watertight joint. The standing seam method gives a more streamlined, contemporary look compared to roll cap and can typically be used on roof slopes of 3°-90°.

= Warm roof or cold roof? =

Traditionally, especially in France, Belgium and Germany, zinc sheet has been applied to a cold roof, where the insulation (if it existed at all) was immediately above the ceiling level and the roof was therefore ‘cold’ (usually with copious ventilation in the roof void). Also, the zinc was applied directly to a deck of close-boarded timber planks with gaps of around 10mm in between. This had the effect of ensuring adequate ventilation to the underside of the zinc, ensuring a service life in excess of 100 years.

Modern construction has tended to favour ‘warm’ roof constructions where the insulation is typically in or above the roof structure, and with an inadequately ventilated roof space. This, taken with the fact that the zinc may have been laid on continuous ply with no ventilation gaps, could lead to condensation and consequent corrosion on the zinc underside and therefore a reduced service life.

When the zinc is to be laid on a continuous substrate (eg 18mm plywood sheets with no ventilation gaps), contemporary practice typically installs a continuous, self-sealing vapour barrier and breather membrane to prevent moisture from condensing on the underside of the zinc.

Substrates other than ply can be used, such as insulated metal-faced panels, rigid insulation and cellular glass foam. Accessories such as zinc roof vents, finials, gutters and downpipes are normally used in conjunction with zinc roofs. Zinc tiles, usually diamond-shaped, can also be used for cladding facades.

= Related articles on Designing Buildings Wiki =

* Aluminium.
* Cast iron.
* Copper.
* Difference between cast iron and wrought iron.
* Failure of cast iron beams.
* Iron.
* Ironwork.
* Mesh mould metal.
* Metal composite panels.
* Metal fabrication.
* Metal profile cladding
* Metal roofing
* Steel.
* The Iron Bridge.
* Types of steel.
* Wrought iron.

[[Category:Education]] [[Category:Construction_techniques]] [[Category:Design]] [[Category:Products_/_components]]