Flat roof - Revision history

Designing Buildings at 09:01, 30 September 2022

2022-09-30T09:01:13Z

← Older revision		Revision as of 09:01, 30 September 2022
Line 9:		Line 9:
	While very common in countries with warm climates, flat roofs were only widely adopted in the UK after the Second World War. They were seen as a cheaper alternative to traditional pitched roofs. However, the longevity of some flat roofs has been poor, ranging from 6 years to 35 years depending on the quality of the covering and the structure.		While very common in countries with warm climates, flat roofs were only widely adopted in the UK after the Second World War. They were seen as a cheaper alternative to traditional pitched roofs. However, the longevity of some flat roofs has been poor, ranging from 6 years to 35 years depending on the quality of the covering and the structure.

−	= ~~Coverings~~ =	+	= Types of flat roof coverings =

	Common flat roof coverings include:		Common flat roof coverings include:
Line 19:		Line 19:
	These roof coverings are generally designed to be laid as flat, continuous sheets, and they are prone to weakness where they are bent; for example at parapets and verges, where they are penetrated by ducts, flues, and so on, and at joints or seams.		These roof coverings are generally designed to be laid as flat, continuous sheets, and they are prone to weakness where they are bent; for example at parapets and verges, where they are penetrated by ducts, flues, and so on, and at joints or seams.

−	= ~~Deck~~ =	+	= Types of flat roof deck =

	== Concrete slab flat roofs ==		== Concrete slab flat roofs ==
Line 50:		Line 50:
	For more information, see Flat roof defects.		For more information, see Flat roof defects.

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

	* A-frame house.		* A-frame house.
Line 62:		Line 62:
	* Flat roof defects.		* Flat roof defects.
	* Green roofs.		* Green roofs.
−	* Hatch.
	* Inverted roof.		* Inverted roof.
	* Long span roof.		* Long span roof.
Line 69:		Line 68:
	* Roofing defects.		* Roofing defects.
	* Thatch roofing.		* Thatch roofing.
−	* Types of cool roofs.
	* Types of roof.		* Types of roof.
	* Wall plate.		* Wall plate.

Editor at 17:19, 26 July 2021

2021-07-26T17:19:42Z

← Older revision		Revision as of 17:19, 26 July 2021
Line 50:		Line 50:
	For more information, see Flat roof defects.		For more information, see Flat roof defects.

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

	* A-frame house.		* A-frame house.
Line 64:		Line 62:
	* Flat roof defects.		* Flat roof defects.
	* Green roofs.		* Green roofs.
		+	* Hatch.
	* Inverted roof.		* Inverted roof.
	* Long span roof.		* Long span roof.

Editor at 17:08, 15 September 2020

2020-09-15T17:08:20Z

← Older revision		Revision as of 17:08, 15 September 2020
Line 70:		Line 70:
	* Roofing defects.		* Roofing defects.
	* Thatch roofing.		* Thatch roofing.
		+	* Types of cool roofs.
	* Types of roof.		* Types of roof.
	* Wall plate.		* Wall plate.
	* Warm roof.		* Warm roof.

−	=== External references ===	+	= External references =

	* ‘Building Construction Handbook’ (6th ed.), CHUDLEY, R., GREENO, R., Butterworth-Heinemann (2007)		* ‘Building Construction Handbook’ (6th ed.), CHUDLEY, R., GREENO, R., Butterworth-Heinemann (2007)

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

Designing Buildings at 09:41, 14 September 2020

2020-09-14T09:41:50Z

← Older revision		Revision as of 09:41, 14 September 2020
Line 78:		Line 78:
	* ‘Building Construction Handbook’ (6th ed.), CHUDLEY, R., GREENO, R., Butterworth-Heinemann (2007)		* ‘Building Construction Handbook’ (6th ed.), CHUDLEY, R., GREENO, R., Butterworth-Heinemann (2007)

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

Editor: Reverted edits by 94.197.121.84 (talk) to last revision by Editor

2019-11-22T15:10:36Z

Reverted edits by 94.197.121.84 (talk) to last revision by Editor

← Older revision		Revision as of 15:10, 22 November 2019
Line 7:		Line 7:
	The Scottish Technical Handbook - Domestic, describes flat roofs as roofs, '...the slope of which does not exceed 10º from the horizontal'.		The Scottish Technical Handbook - Domestic, describes flat roofs as roofs, '...the slope of which does not exceed 10º from the horizontal'.

−	While very common in countries with warm climates, flat roofs were only widely adopted in the UK after the Second World War. They were seen as a cheaper alternative to traditional pitched roofs. However, the longevity of some flat roofs has been poor, ranging from 6 years to 35 years depending on the quality of the covering and the structure.~~shakka~~	+	While very common in countries with warm climates, flat roofs were only widely adopted in the UK after the Second World War. They were seen as a cheaper alternative to traditional pitched roofs. However, the longevity of some flat roofs has been poor, ranging from 6 years to 35 years depending on the quality of the covering and the structure.
−		+
−	~~= =~~	+

	= Coverings =		= Coverings =
Line 80:		Line 78:
	* ‘Building Construction Handbook’ (6th ed.), CHUDLEY, R., GREENO, R., Butterworth-Heinemann (2007)		* ‘Building Construction Handbook’ (6th ed.), CHUDLEY, R., GREENO, R., Butterworth-Heinemann (2007)

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

94.197.121.84 at 13:57, 22 November 2019

2019-11-22T13:57:27Z

← Older revision		Revision as of 13:57, 22 November 2019
Line 7:		Line 7:
	The Scottish Technical Handbook - Domestic, describes flat roofs as roofs, '...the slope of which does not exceed 10º from the horizontal'.		The Scottish Technical Handbook - Domestic, describes flat roofs as roofs, '...the slope of which does not exceed 10º from the horizontal'.

−	While very common in countries with warm climates, flat roofs were only widely adopted in the UK after the Second World War. They were seen as a cheaper alternative to traditional pitched roofs. However, the longevity of some flat roofs has been poor, ranging from 6 years to 35 years depending on the quality of the covering and the structure.	+	While very common in countries with warm climates, flat roofs were only widely adopted in the UK after the Second World War. They were seen as a cheaper alternative to traditional pitched roofs. However, the longevity of some flat roofs has been poor, ranging from 6 years to 35 years depending on the quality of the covering and the structure.shakka
		+
		+	= =

	= Coverings =		= Coverings =

Editor: Reverted edits by 110.37.219.59 (talk) to last revision by Editor

2018-11-06T11:54:49Z

Reverted edits by 110.37.219.59 (talk) to last revision by Editor

← Older revision		Revision as of 11:54, 6 November 2018
Line 1:		Line 1:
−	Re	+	= Introduction =

−	~~Residential & Commercial Roong~~, ~~Vinyl Siding & Gutters<br />~~	+	A flat roof is a roof that is completely, or almost level. However, whilst they are described as ‘flat’ almost all flat roofs are actually laid to a fall to ensure that rainwater can run off to the lower side. Typically they are designed to have a minimum fall of 1:40, which given on-site inaccuracies should result in a minimum fall of at least 1:80 in the finished construction.
−	~~Windows & Doors~~, ~~Residential & Commercial Skylights<br />~~	+
−	~~vinyl siding repair https://allprofessionalremodelinggroup~~.~~com/vinyl~~-~~siding/~~	+

−	~~[[Category~~:~~Articles_needing_more_work]]~~ [[Category:Construction_techniques]] [[Category:Design]] [[Category:Products_/_components]]	+	This is in contrast with a pitched roof which slopes.
		+
		+	The Scottish Technical Handbook - Domestic, describes flat roofs as roofs, '...the slope of which does not exceed 10º from the horizontal'.
		+
		+	While very common in countries with warm climates, flat roofs were only widely adopted in the UK after the Second World War. They were seen as a cheaper alternative to traditional pitched roofs. However, the longevity of some flat roofs has been poor, ranging from 6 years to 35 years depending on the quality of the covering and the structure.
		+
		+	= Coverings =
		+
		+	Common flat roof coverings include:
		+
		+	* Sheet materials such as bituminous felt.
		+	* In situ material materials such as asphalt.
		+	* Metal such as lead or copper.
		+
		+	These roof coverings are generally designed to be laid as flat, continuous sheets, and they are prone to weakness where they are bent; for example at parapets and verges, where they are penetrated by ducts, flues, and so on, and at joints or seams.
		+
		+	= Deck =
		+
		+	== Concrete slab flat roofs ==
		+
		+	A concrete slab flat roof is normally made up of a structural layer of concrete finished with a smooth screed onto which a water proof layer such as a membrane is laid. The roof should incorporate insulation and usually a vapour control layer to protect from interstitial condensation.
		+
		+	== Timber flat roofs ==
		+
		+	Timber flat roof construction usually consists of structural joists topped with a decking of plywood or a similar sheet material. Wherever possible, joists should span the shortest distance of the roof plan . The pitch is governed by the roof covering and the required rate of rainwater discharge.
		+
		+	There are a number of different possible methods of creating a fall (slope):
		+
		+	* Joists cut to falls with flat soffit: These are simple to fix but may not be very economical in terms of timber usage, unless two joists are cut from one piece.
		+	* Joists laid to falls with sloping soffit: Economic and simple but the sloping soffit may need to be hidden by a flat suspended ceiling.
		+	* Firrings (tapered strips fixed above the joists) with joist run: Simple and effective but it does not provide a means of natural cross ventilation.
		+	* Firrings against joist run: Simple, effective, and provides a means of natural cross ventilation, but uses more timber.
		+
		+	The loadings and span of the flat roof will determine the spacing and sizes of the joists required.
		+
		+	As with concrete flat roofs, a timber construction will be finished with a waterproof covering such as a membrane, or a sheet material such as lead. Insulation will be incorporated within the roof build up, together with a vapour control layer to protect from interstitial condensation.
		+
		+	Garages may be un-insulated, but most roofs above the habitable part of the house will need to be insulated to comply with Building Regulations.
		+
		+	Conservation of energy can be achieved in two ways:
		+
		+	* Cold roof: Insulation is placed on the ceiling lining, between the joists.
		+	* Warm roof: Insulation is placed below the waterproof covering, above the roof decking.
		+	* Inverted roof: Insulation is placed above the waterproof covering.
		+
		+	For more information, see Flat roof defects.
		+
		+	= Find out more =
		+
		+	=== Related articles on Designing Buildings Wiki ===
		+
		+	* A-frame house.
		+	* Blue roof.
		+	* Cold roof.
		+	* Conical roof slating.
		+	* Cool roofs.
		+	* Domestic roofs.
		+	* Dormer window.
		+	* Firring.
		+	* Flat roof defects.
		+	* Green roofs.
		+	* Inverted roof.
		+	* Long span roof.
		+	* Mansard roof.
		+	* Pitched roof.
		+	* Roofing defects.
		+	* Thatch roofing.
		+	* Types of roof.
		+	* Wall plate.
		+	* Warm roof.
		+
		+	=== External references ===
		+
		+	* ‘Building Construction Handbook’ (6th ed.), CHUDLEY, R., GREENO, R., Butterworth-Heinemann (2007)
		+
		+	[[Category:Construction_techniques]] [[Category:Design]] [[Category:Products_/_components]]

110.37.219.59: Replaced content with "Re Residential & Commercial Roong, Vinyl Siding & Gutters
Windows & Doors, Residential & Commercial Skylights
vinyl siding repair https://allprof..."

2018-11-06T10:46:20Z

Replaced content with "Re Residential & Commercial Roong, Vinyl Siding & Gutters<br /> Windows & Doors, Residential & Commercial Skylights<br /> vinyl siding repair https://allprof..."

← Older revision		Revision as of 10:46, 6 November 2018
Line 1:		Line 1:
−	~~= Introduction =~~	+	Re

−	~~A flat roof is a roof that is completely~~, ~~or almost level. However~~, ~~whilst they are described as ‘flat’ almost all flat roofs are actually laid to a fall to ensure that rainwater can run off to the lower side~~. ~~Typically they are designed to have a minimum fall of 1:40, which given on~~-~~site inaccuracies should result in a minimum fall of at least 1:80 in the finished construction.~~	+	Residential & Commercial Roong, Vinyl Siding & Gutters<br />
		+	Windows & Doors, Residential & Commercial Skylights<br />
		+	vinyl siding repair https://allprofessionalremodelinggroup.com/vinyl-siding/

−	~~This is in contrast with a pitched roof which slopes.~~	+	[[Category:Articles_needing_more_work]] [[Category:Construction_techniques]] [[Category:Design]] [[Category:Products_/_components]]
−		+
−	~~The Scottish Technical Handbook - Domestic, describes flat roofs as roofs, '...the slope of which does not exceed 10º from the horizontal'.~~	+
−		+
−	While very common in countries with warm climates, flat roofs were only widely adopted in the UK after the Second World War. They were seen as a cheaper alternative to traditional pitched roofs. However, the longevity of some flat roofs has been poor, ranging from 6 years to 35 years depending on the quality of the covering and the structure.	+
−		+
−	~~= Coverings =~~	+
−		+
−	~~Common flat roof coverings include~~:	+
−		+
−	* Sheet materials such as bituminous felt.	+
−	* In situ material materials such as asphalt.	+
−	* Metal such as lead or copper.	+
−		+
−	These roof coverings are generally designed to be laid as flat, continuous sheets, and they are prone to weakness where they are bent; for example at parapets and verges, where they are penetrated by ducts, flues, and so on, and at joints or seams.	+
−		+
−	~~= Deck =~~	+
−		+
−	~~== Concrete slab flat roofs ==~~	+
−		+
−	A concrete slab flat roof is normally made up of a structural layer of concrete finished with a smooth screed onto which a water proof layer such as a membrane is laid. The roof should incorporate insulation and usually a vapour control layer to protect from interstitial condensation.	+
−		+
−	~~== Timber flat roofs ==~~	+
−		+
−	Timber flat roof construction usually consists of structural joists topped with a decking of plywood or a similar sheet material. Wherever possible, joists should span the shortest distance of the roof plan . The pitch is governed by the roof covering and the required rate of rainwater discharge.	+
−		+
−	~~There are a number of different possible methods of creating a fall (slope):~~	+
−		+
−	* Joists cut to falls with flat soffit: These are simple to fix but may not be very economical in terms of timber usage, unless two joists are cut from one piece.	+
−	* Joists laid to falls with sloping soffit: Economic and simple but the sloping soffit may need to be hidden by a flat suspended ceiling.	+
−	* Firrings (tapered strips fixed above the joists) with joist run: Simple and effective but it does not provide a means of natural cross ventilation.	+
−	* Firrings against joist run: Simple, effective, and provides a means of natural cross ventilation, but uses more timber.	+
−		+
−	~~The loadings and span of the flat roof will determine the spacing and sizes of the joists required.~~	+
−		+
−	As with concrete flat roofs, a timber construction will be finished with a waterproof covering such as a membrane, or a sheet material such as lead. Insulation will be incorporated within the roof build up, together with a vapour control layer to protect from interstitial condensation.	+
−		+
−	~~Garages may be un-insulated, but most roofs above the habitable part of the house will need to be insulated to comply with Building Regulations.~~	+
−		+
−	~~Conservation of energy can be achieved in two ways:~~	+
−		+
−	* Cold roof: Insulation is placed on the ceiling lining, between the joists.	+
−	* Warm roof: Insulation is placed below the waterproof covering, above the roof decking.	+
−	* Inverted roof: Insulation is placed above the waterproof covering.	+
−		+
−	~~For more information, see Flat roof defects.~~	+
−		+
−	~~= Find out more =~~	+
−		+
−	~~=== Related articles on Designing Buildings Wiki ===~~	+
−		+
−	* A-frame house.	+
−	* Blue roof.	+
−	* Cold roof.	+
−	* Conical roof slating.	+
−	* Cool roofs.	+
−	* Domestic roofs.	+
−	* Dormer window.	+
−	* Firring.	+
−	* Flat roof defects.	+
−	* Green roofs.	+
−	* Inverted roof.	+
−	* Long span roof.	+
−	* Mansard roof.	+
−	* Pitched roof.	+
−	* Roofing defects.	+
−	* Thatch roofing.	+
−	* Types of roof.	+
−	* Wall plate.	+
−	* Warm roof.	+
−		+
−	~~=== External references ===~~	+
−		+
−	* ‘Building Construction Handbook’ (6th ed.), CHUDLEY, R., GREENO, R., Butterworth-Heinemann (2007)	+
−		+
−	[[Category:Construction_techniques]] [[Category:Design]] [[Category:Products_/_components]]	+

Editor at 13:38, 1 June 2018

2018-06-01T13:38:42Z

← Older revision		Revision as of 13:38, 1 June 2018
Line 17:		Line 17:
	* Metal such as lead or copper.		* Metal such as lead or copper.

−	These roof coverings are generally designed to be laid as flat, continuous sheets, and they are prone to weakness where they are bent; for example at parapets and verges, where they are penetrated by ducts, flues and so on, and at joints or seams.	+	These roof coverings are generally designed to be laid as flat, continuous sheets, and they are prone to weakness where they are bent; for example at parapets and verges, where they are penetrated by ducts, flues, and so on, and at joints or seams.

	= Deck =		= Deck =
Line 31:		Line 31:
	There are a number of different possible methods of creating a fall (slope):		There are a number of different possible methods of creating a fall (slope):

−	* Joists cut to falls with flat soffit:These are simple to fix but may not be very economical in terms of timber usage, unless two joists are cut from one piece.	+	* Joists cut to falls with flat soffit: These are simple to fix but may not be very economical in terms of timber usage, unless two joists are cut from one piece.
−	* Joists laid to falls with sloping soffit:Economic and simple but the sloping soffit may need to be hidden by a flat suspended ceiling.	+	* Joists laid to falls with sloping soffit: Economic and simple but the sloping soffit may need to be hidden by a flat suspended ceiling.
−	* Firrings (tapered strips fixed above the joists) with joist run:Simple and effective but it does not provide a means of natural cross ventilation.	+	* Firrings (tapered strips fixed above the joists) with joist run: Simple and effective but it does not provide a means of natural cross ventilation.
−	* Firrings against joist run:Simple, effective, and provides a means of natural cross ventilation, but uses more timber.	+	* Firrings against joist run: Simple, effective, and provides a means of natural cross ventilation, but uses more timber.

	The loadings and span of the flat roof will determine the spacing and sizes of the joists required.		The loadings and span of the flat roof will determine the spacing and sizes of the joists required.
Line 66:		Line 66:
	* Inverted roof.		* Inverted roof.
	* Long span roof.		* Long span roof.
		+	* Mansard roof.
	* Pitched roof.		* Pitched roof.
	* Roofing defects.		* Roofing defects.

Editor at 17:32, 13 March 2018

2018-03-13T17:32:47Z

← Older revision		Revision as of 17:32, 13 March 2018
Line 3:		Line 3:
	A flat roof is a roof that is completely, or almost level. However, whilst they are described as ‘flat’ almost all flat roofs are actually laid to a fall to ensure that rainwater can run off to the lower side. Typically they are designed to have a minimum fall of 1:40, which given on-site inaccuracies should result in a minimum fall of at least 1:80 in the finished construction.		A flat roof is a roof that is completely, or almost level. However, whilst they are described as ‘flat’ almost all flat roofs are actually laid to a fall to ensure that rainwater can run off to the lower side. Typically they are designed to have a minimum fall of 1:40, which given on-site inaccuracies should result in a minimum fall of at least 1:80 in the finished construction.

−	This is in contrast to a pitched roof which slopes.	+	This is in contrast with a pitched roof which slopes.

	The Scottish Technical Handbook - Domestic, describes flat roofs as roofs, '...the slope of which does not exceed 10º from the horizontal'.		The Scottish Technical Handbook - Domestic, describes flat roofs as roofs, '...the slope of which does not exceed 10º from the horizontal'.