Apple's new HQ opened to employees this week, and has been touted as 'the best office building in the world'.
The risk of moisture in hard-to-treat buildings.
Find out about the intricate art of pyrography.
Read our review of a new book examining methods used to observe how sustainable buildings work in occupation.
Find out about adjudication in construction contracts with our introductory article.
London churches in the age of Wren, Hooke, Hawksmoor and Gibbs - Book review.
Our interview with Tom Dyckhoff about his new book 'The Age of Spectacle', starchitects, microhousing, the building he would demolish, and more...
Fascinating article from 1988 about the importance of recording old industrial sites.
Take back the golf courses, says U+I's Richard Upton, and draw up a fresh vision for the Green Belt.
This Ronchamp chapel designed by Le Corbusier is considered one of the most important buildings of the 20th century.
From networked sensors to M2M to analytics - are these the key trends making cities greener, safer and smarter?
What is the 'soft landings' strategy and how is it implemented?
You might be familiar with gargoyles, but do you know what a hunky punk is?
Will the skyscrapers of the future be made of wood?
Ever wondered what the fastest lifts in the world are? This article will tell you.
Is construction slow to modernise? Major research into materials choice in the supply chain gets underway.
Is this the boldest goal for 3D concrete printing - reproducing Michelangelo's David?
A renaissance in the ideas of garden villages and towns.
What are method statements and what are they used for in construction?
"DECC should be reinstated, with teeth", says the man behind 'Grand Designs', Kevin McCloud.
The fascinating history of an idea first pioneered in the USA.
Have a look at this newly-opened linear park on an elevated highway in Seoul.
The charity for the blind wants to encourage greater collaboration with built environment planners.
Grounds for optimism on commercial construction.
What policies will win construction's vote in the general election?
BRE and Loughborough University announce plans for a 'dementia-friendly' demonstration home.
CIOB launch new toolkit tackling the poor image construction still suffers among pupils in the 14-19 age group and their teachers.
Abuse of migrants on Qatar 2022 World Cup sites remains widespread.
China unveils world's largest 'spokeless' Ferris wheel.
One in five safety fails relates to working at height, according to new figures.
BRE publish a new information paper: Understanding the factors affecting flashover of a fire in modern buildings.
What are the main changes and new provisions in the soon-to-be-published NEC4 works contract?
RIBA 'pleased' with Labour's manifesto.
CIOB wins two accolades at MemCom 2017.
Volvo Group unveils construction's first ever electric excavator.
Conservative manifesto says the charge levied on companies employing migrants will be doubled.
Have a look at these new designs for a mountain range-style housing scheme in Bratislava.
Makeover planned for London's 'Silicon roundabout'.
New survey shows limited impact of CDM 2015 reforms.
World's largest wind turbines start spinning off the coast of Liverpool.
Trellick Tower to undergo extensive external restoration works.
London’s Skyline Campaign launches a petition against changes to Westminster’s tall buildings policy.
Designing Buildings Wiki becomes a recognised CPD provider for the Institute of Historic Building Conservation.
The UK needs a strategic approach from the next government to deliver the infrastructure needed to thrive.
Wired examines the proptech currently defining asset management.
CIH encouraged by Labour's manifesto pledges on housing.
'EU nationals must not be a bargaining chip', says Richard Rogers and architects in letter to government.
The rise of cyber crime and tips to protect your business.
Bitcoin for construction could improve payment.
Take a look at this new concept for large-scale painting by drones.
British-Ghanaian architect David Adjaye receives knighthood.
ICE's Bridge Engineering exhibition closes with 'failure test' of their LEGO bridge.
In the wake of Friday's cyber attacks, some do's and don'ts around smart technology in buildings.
Delays hit construction of the world's planned tallest building, Jeddah Tower.
Construction costs in London have jumped 5% over the past 12 months.
Have a look at this major new eco park proposed for northern China.
BSRIA launch report contemplating the office needs of millennials and Generation Z.
Mies van der Rohe Award 2017 goes to revamp of 1960s slab block in Holland.
CAMBOO Festival highlights the use of bamboo in architecture as the material grows in popularity.
RICS outline their manifesto priorities for the built environment.
Designing Buildings Wiki is the only industry-wide, cross-discipline forum for finding and sharing information.
Anyone can create articles about subjects they know and anyone can find articles about subjects they don’t.
A roof structure has basic functional requirements that have to be fulfilled, these can be broken down as follows:
 Climate barrier
The main basic requirement is to keep the weather out and the warmth in, enabling it to maintain a comfortable environment for its inhabitants to live in and carry out the social activities that the building was designed for.
A roof should provide adequate insulation as it is the main area of a building where heat loss may occur.
 Strength and stability
A roof has to have the ability to carry the self-weight of the roof covering and structure and be able to resist forces from winds and the applied load of snow.
The structure should be built as light as current technologies allow to keep imposed loads on the supporting walls to a minimum and finding the most economic means of carrying the roof structure and its load over spans of varying degrees.
 Fire protection
The roof must also prevent the spread of fire to and from adjacent or adjoined properties.
The type of roof used can alter the appearance of a building. There are many types of coverings with different colours and textures which may add to the appeal of the finished building. The slope of the roof also has a major impact on the aesthetics.
 Pitched roofs
 The Mono Pitch Roof
The mono pitch roof was commonly used to form extensions in Victorian times and is still used in a similar fashion today.
It comprises a series of rafters fixed to plates at the top of a wall and the rafter feet are nailed to a wall plate, which distributes the load evenly across the supporting wall.
Joists were fitted to form level ceilings, and could be raised to give more height. They were commonly supported by struts, which stopped the rafters from sagging. Victorians often built the timber joists into the wall, creating a risk of timber rot and cold bridging.
This could potentially compromise the stability of the wall. This is no longer considered good practice and joist hangers are now commonly used which give the same support, while not affecting the wall.