Wood and roof design - Revision history

Designing Buildings at 07:17, 1 March 2021

2021-03-01T07:17:06Z

← Older revision		Revision as of 07:17, 1 March 2021
Line 61:		Line 61:
	* Types of roof.		* Types of roof.

−	[[Category:~~Products_/_components~~]] [[Category:DCN_Product_Knowledge]]	+	[[Category:DCN_Commentary]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Products_/_components]]

Designing Buildings at 16:23, 2 September 2019

2019-09-02T16:23:18Z

← Older revision		Revision as of 16:23, 2 September 2019
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	One piece of roof architecture that has been totting up the column inches is Europe’s first eco-mosque, [https://woodawards.com/cambridge-central-mosque/ Cambridge Central Mosque]. The roof structure is made from CLT but it’s the intricate glulam vaulted structure that is the talking point. The elaborate design incorporates ‘The Breath of the Compassionate’, a historic Islamic eight-point star pattern, conjuring up the visual representation of breathing in and out.		One piece of roof architecture that has been totting up the column inches is Europe’s first eco-mosque, [https://woodawards.com/cambridge-central-mosque/ Cambridge Central Mosque]. The roof structure is made from CLT but it’s the intricate glulam vaulted structure that is the talking point. The elaborate design incorporates ‘The Breath of the Compassionate’, a historic Islamic eight-point star pattern, conjuring up the visual representation of breathing in and out.

−	== Putting nature on top ==	+	= Putting nature on top =

−	With the pressure on to make the built environment a cleaner and greener place, green roofs are gaining popularity, particularly on commercial buildings. Eco homes have also been adopting this principle for a while and now these sustainability credentials are catching on for housing developments. [https://woodforgood.com/case-studies/south-gardens Futurehome], a multi-award-winning 15-home project in Elephant Park in London, used a number of sustainable innovations, including green wildflower roof construction. This includes a roof level garden for residents to grow their own plants and vegetables. In high-density urban areas where space is scarce, using roofs as gardens is an ideal solution.	+	With the pressure on to make the built environment a cleaner and greener place, green roofs are gaining popularity, particularly on commercial buildings. Eco homes have also been adopting this principle for a while and now these sustainability credentials are catching on for housing developments. [https://woodforgood.com/case-studies/south-gardens Futurehome], a multi-award-winning 15-home project in Elephant Park in London, used a number of sustainable innovations, including green wildflower roof construction. This includes a roof level garden for residents to grow their own plants and vegetables. In high-density urban areas where space is scarce, using roofs as gardens can be an ideal solution.

−	Green roofs do need a lot of maintenance though. ~~Like~~ with any garden, they need regular upkeep and ~~there’s~~ also the issue of drainage. In response to the upward trend in green roofs, the Green Roof Organisation was established in 2008 and ~~pulled together~~ a [https://livingroofs.org/wp-content/uploads/2016/03/grocode2014.pdf Green Roof Code of Best Practice for the UK]. In addition to drainage, other design considerations include root resistant materials and the type of vegetation used.	+	Green roofs do need a lot of maintenance though. As with any garden, they need regular upkeep, and there is also the issue of drainage. In response to the upward trend in green roofs, the Green Roof Organisation was established in 2008 and published a [https://livingroofs.org/wp-content/uploads/2016/03/grocode2014.pdf Green Roof Code of Best Practice for the UK]. In addition to drainage, other design considerations include root resistant materials and the type of vegetation used.

−	== The sky is the limit ==	+	= The sky is the limit =

	While the pitched roof continues to be the design of choice, timber is being embraced to enhance a roof’s design, functionality and sustainability. Engineered timber is literally bending the rules for roofscapes and offsite solutions such as trussed rafters look set to grow as the UK continues in its quest to build more new homes.		While the pitched roof continues to be the design of choice, timber is being embraced to enhance a roof’s design, functionality and sustainability. Engineered timber is literally bending the rules for roofscapes and offsite solutions such as trussed rafters look set to grow as the UK continues in its quest to build more new homes.
		+
		+	= Related articles on Designing Buildings Wiki =
		+
		+	* Cool roofs.
		+	* Domestic roofs.
		+	* Flat roof.
		+	* Gable.
		+	* Gambrel roof.
		+	* Long span roof.
		+	* Mansard roof.
		+	* Metal roofing.
		+	* Rafter.
		+	* Roof slates.
		+	* Roof tiles.
		+	* Roofing defects.
		+	* Sarking.
		+	* Sheathing.
		+	* Thatch roofing.
		+	* Truss.
		+	* Types of roof.
		+
		+	[[Category:Products_/_components]] [[Category:DCN_Product_Knowledge]]

Designing Buildings at 16:18, 2 September 2019

2019-09-02T16:18:45Z

← Older revision		Revision as of 16:18, 2 September 2019
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−	Roofs are a fundamental structural element, yet it’s rarely the roof that we marvel at when admiring a building’s design. Beyond the traditional pitched roof a variation of styles showcase great design, from flat to curved, from shell to hyperbolic. How practical are these variations in a country that gets more than its fair share of rain? What are key considerations when using different types of systems?	+	= Introduction =

−	== The traditional route ==	+	Beyond the traditional pitched roof, a variety of timber roof styles showcase great design, from flat to curved, from shell to hyperbolic. But how practical are these variations in a country that gets more than its fair share of rain? What are key considerations when using different types of systems?
		+
		+	= The traditional route =

	For most UK homes, the go-to design is a pitched roof, covered with clay, concrete or slate tiles. The pitched roof adorns homes across the UK for good reason. The sloped design directs rainwater into the guttering, providing effective drainage. This style of roof can be constructed as a cut roof – where timber rafters are cut on site - or a truss roof using trussed rafters (also known as roof trusses). Trussed rafters are an increasingly popular choice as they are precision cut and built offsite and delivered to site when they’re ready to be installed.		For most UK homes, the go-to design is a pitched roof, covered with clay, concrete or slate tiles. The pitched roof adorns homes across the UK for good reason. The sloped design directs rainwater into the guttering, providing effective drainage. This style of roof can be constructed as a cut roof – where timber rafters are cut on site - or a truss roof using trussed rafters (also known as roof trusses). Trussed rafters are an increasingly popular choice as they are precision cut and built offsite and delivered to site when they’re ready to be installed.

−	As the housebuilding industry continues to face pressure to build more homes, any method that reduces both build time and wastage is a bonus. Though the overall roof design and structure is carried out by the building ~~designer~~ (~~normally~~ the architect), the trusses are designed by the trussed rafter designer. Trussed rafters are made from timber so ~~like~~ with all building products, they should be stored safely and kept dry to avoid the structure being compromised by excessive exposure to moisture.	+	As the housebuilding industry continues to face pressure to build more homes, any method that reduces both build time and wastage is a bonus. Though the overall roof design and structure is carried out by the building designers (such as the architect and engineers), the trusses are designed by the trussed rafter designer.
		+
		+	Trussed rafters are made from timber so, as with all building products, they should be stored safely and kept dry to avoid the structure being compromised by excessive exposure to moisture.

	The Trussed Rafter Association (TRA) recently published a [https://www.tra.org.uk/technical-advice-downloads/trussed-rafters/ buyers’ guide to trussed rafters] to help those specifying roof trusses to make the best choice for their build. The TRA has also put together a [https://www.tra.org.uk/technical-advice-downloads/spandrel-gable-panels/ spandrel panel guide]. Like trussed rafters, spandrel panels are pre-fabricated. They can be used as a separating wall or as an alternative to traditional masonry gable ends.		The Trussed Rafter Association (TRA) recently published a [https://www.tra.org.uk/technical-advice-downloads/trussed-rafters/ buyers’ guide to trussed rafters] to help those specifying roof trusses to make the best choice for their build. The TRA has also put together a [https://www.tra.org.uk/technical-advice-downloads/spandrel-gable-panels/ spandrel panel guide]. Like trussed rafters, spandrel panels are pre-fabricated. They can be used as a separating wall or as an alternative to traditional masonry gable ends.

−	In addition to a cut roof or trussed rafters, another way to create a pitched roof is by using roof panels. Also known as structural insulated panels (SIPs) ~~and~~ roof cassettes they are fabricated offsite and in the case of SIPs, are readily insulated. Always check that SIPs are waterproof and are protected from pests. The [https://www.wood-protection.org/ Wood Protection Association] can advise on the best and safest treatments for pest-resistance. ~~Like~~ with trussed rafters, it’s ~~advised~~ that the building designer works closely with the SIPs manufacturer.	+	In addition to a cut roof or trussed rafters, another way to create a pitched roof is by using roof panels. Also known as structural insulated panels (SIPs) or roof cassettes they are fabricated offsite and in the case of SIPs, are readily insulated. Always check that SIPs are waterproof and are protected from pests. The [https://www.wood-protection.org/ Wood Protection Association] can advise on the best and safest treatments for pest-resistance. As with trussed rafters, it’s advisable that the building designer works closely with the SIPs manufacturer.

−	== A contemporary alternative ==	+	= A contemporary alternative =

	Often seen as a cheaper alternative to pitched roofs and favoured for modern architecture, flat roofs first became popular in the UK after the second world war. Traditionally the flat roof is more common in warmer climates, however, with careful design and engineering, flat roofs are a viable option in the UK. Using timber joists across the shortest span of the roof, a waterproof membrane or sheeting can be used to ensure it is watertight.		Often seen as a cheaper alternative to pitched roofs and favoured for modern architecture, flat roofs first became popular in the UK after the second world war. Traditionally the flat roof is more common in warmer climates, however, with careful design and engineering, flat roofs are a viable option in the UK. Using timber joists across the shortest span of the roof, a waterproof membrane or sheeting can be used to ensure it is watertight.
Line 17:		Line 21:
	In the UK, the National Federation of Roofing Contractors (NFRC) recommends a warm roof. This means applying an insulation layer between the timber and the waterproof covering. If the roof is inverted, the insulation should be placed on top of the waterproof covering.		In the UK, the National Federation of Roofing Contractors (NFRC) recommends a warm roof. This means applying an insulation layer between the timber and the waterproof covering. If the roof is inverted, the insulation should be placed on top of the waterproof covering.

−	One way ~~to achieve~~ a flat timber roof with effective insulation is with cross-laminated timber (CLT). An example is the innovative [https://woodforgood.com/case-studies/redshank Redshank]. Built to resist flooding, the entire superstructure was built from CLT and clad in cork panels, meaning there is no need for guttering as rain drains off the surface. Using CLT for the roof also means the interior could be left bare as the natural warmth of the wood was preferred over traditional plastering.	+	One way of achieving a flat timber roof with effective insulation is with cross-laminated timber (CLT). An example is the innovative [https://woodforgood.com/case-studies/redshank Redshank]. Built to resist flooding, the entire superstructure was built from CLT and clad with cork panels, meaning there is no need for guttering as rain drains off the surface. Using CLT for the roof also means the interior could be left bare as the natural warmth of the wood was preferred over traditional plastering.

−	== Getting creative ==	+	= Getting creative =

	Despite their popularity, pitched and flat roofs are not the only options available. Shell roofs, vaulted ceilings, domes and hyperbolic paraboloids are ideal for statement designs.		Despite their popularity, pitched and flat roofs are not the only options available. Shell roofs, vaulted ceilings, domes and hyperbolic paraboloids are ideal for statement designs.

Wood for Good: Created page with "Roofs are a fundamental structural element, yet it’s rarely the roof that we marvel at when admiring a building’s design. Beyond the traditional pitched roof a variation of s..."

2019-08-23T10:19:13Z

Created page with "Roofs are a fundamental structural element, yet it’s rarely the roof that we marvel at when admiring a building’s design. Beyond the traditional pitched roof a variation of s..."

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Roofs are a fundamental structural element, yet it’s rarely the roof that we marvel at when admiring a building’s design. Beyond the traditional pitched roof a variation of styles showcase great design, from flat to curved, from shell to hyperbolic. How practical are these variations in a country that gets more than its fair share of rain? What are key considerations when using different types of systems?

== The traditional route ==

For most UK homes, the go-to design is a pitched roof, covered with clay, concrete or slate tiles. The pitched roof adorns homes across the UK for good reason. The sloped design directs rainwater into the guttering, providing effective drainage. This style of roof can be constructed as a cut roof – where timber rafters are cut on site - or a truss roof using trussed rafters (also known as roof trusses). Trussed rafters are an increasingly popular choice as they are precision cut and built offsite and delivered to site when they’re ready to be installed.

As the housebuilding industry continues to face pressure to build more homes, any method that reduces both build time and wastage is a bonus. Though the overall roof design and structure is carried out by the building designer (normally the architect), the trusses are designed by the trussed rafter designer. Trussed rafters are made from timber so like with all building products, they should be stored safely and kept dry to avoid the structure being compromised by excessive exposure to moisture.

The Trussed Rafter Association (TRA) recently published a [https://www.tra.org.uk/technical-advice-downloads/trussed-rafters/ buyers’ guide to trussed rafters] to help those specifying roof trusses to make the best choice for their build. The TRA has also put together a [https://www.tra.org.uk/technical-advice-downloads/spandrel-gable-panels/ spandrel panel guide]. Like trussed rafters, spandrel panels are pre-fabricated. They can be used as a separating wall or as an alternative to traditional masonry gable ends.

In addition to a cut roof or trussed rafters, another way to create a pitched roof is by using roof panels. Also known as structural insulated panels (SIPs) and roof cassettes they are fabricated offsite and in the case of SIPs, are readily insulated. Always check that SIPs are waterproof and are protected from pests. The [https://www.wood-protection.org/ Wood Protection Association] can advise on the best and safest treatments for pest-resistance. Like with trussed rafters, it’s advised that the building designer works closely with the SIPs manufacturer.

== A contemporary alternative ==

Often seen as a cheaper alternative to pitched roofs and favoured for modern architecture, flat roofs first became popular in the UK after the second world war. Traditionally the flat roof is more common in warmer climates, however, with careful design and engineering, flat roofs are a viable option in the UK. Using timber joists across the shortest span of the roof, a waterproof membrane or sheeting can be used to ensure it is watertight.

In the UK, the National Federation of Roofing Contractors (NFRC) recommends a warm roof. This means applying an insulation layer between the timber and the waterproof covering. If the roof is inverted, the insulation should be placed on top of the waterproof covering.

One way to achieve a flat timber roof with effective insulation is with cross-laminated timber (CLT). An example is the innovative [https://woodforgood.com/case-studies/redshank Redshank]. Built to resist flooding, the entire superstructure was built from CLT and clad in cork panels, meaning there is no need for guttering as rain drains off the surface. Using CLT for the roof also means the interior could be left bare as the natural warmth of the wood was preferred over traditional plastering.

== Getting creative ==

Despite their popularity, pitched and flat roofs are not the only options available. Shell roofs, vaulted ceilings, domes and hyperbolic paraboloids are ideal for statement designs.

Often reserved for bespoke projects such as self-build homes and commercial builds, this is where roof design can really shine. The flexibility of engineered timber, such as CLT and glulam, has allowed for eye-catching roof designs at [https://woodforgood.com/case-studies/marks-and-spencer/ M&S in Cheshire Oaks], [https://woodforgood.com/case-studies/scottish-parliament/ Scottish Parliament] and [https://woodforgood.com/case-studies/bishop-edward-king-chapel/ Bishop Edward King Chapel]. Modified timber has also played its part and the entire structure for Sydney-based restaurant, [https://woodforgood.com/case-studies/barangaroo-house Barangaroo House], is created from Accoya wood.

One piece of roof architecture that has been totting up the column inches is Europe’s first eco-mosque, [https://woodawards.com/cambridge-central-mosque/ Cambridge Central Mosque]. The roof structure is made from CLT but it’s the intricate glulam vaulted structure that is the talking point. The elaborate design incorporates ‘The Breath of the Compassionate’, a historic Islamic eight-point star pattern, conjuring up the visual representation of breathing in and out.

== Putting nature on top ==

With the pressure on to make the built environment a cleaner and greener place, green roofs are gaining popularity, particularly on commercial buildings. Eco homes have also been adopting this principle for a while and now these sustainability credentials are catching on for housing developments. [https://woodforgood.com/case-studies/south-gardens Futurehome], a multi-award-winning 15-home project in Elephant Park in London, used a number of sustainable innovations, including green wildflower roof construction. This includes a roof level garden for residents to grow their own plants and vegetables. In high-density urban areas where space is scarce, using roofs as gardens is an ideal solution.

Green roofs do need a lot of maintenance though. Like with any garden, they need regular upkeep and there’s also the issue of drainage. In response to the upward trend in green roofs, the Green Roof Organisation was established in 2008 and pulled together a [https://livingroofs.org/wp-content/uploads/2016/03/grocode2014.pdf Green Roof Code of Best Practice for the UK]. In addition to drainage, other design considerations include root resistant materials and the type of vegetation used.

== The sky is the limit ==

While the pitched roof continues to be the design of choice, timber is being embraced to enhance a roof’s design, functionality and sustainability. Engineered timber is literally bending the rules for roofscapes and offsite solutions such as trussed rafters look set to grow as the UK continues in its quest to build more new homes.