Modern methods of construction add to arson and hot works fire risks

Schools also at risk

Schools can also be at greater risk of malicious fire setting, particularly during long periods where they are of unoccupied. They can take a number of measures to reduce risk, from reviewing and upgrading building security, to relocating combustible external structures such as sheds, waste and litter bins or temporary buildings, away from main buildings. Organisations should also conduct routine inspections ensuring procedures and maintenance schedules are up-to-date, and implementing effective incident reporting processes.

HOT WORKS

Hot works are defined as any building, maintenance or refurbishment work that requires the application of heat, such as grinding, welding or torch applied roofing and as such represents another major fire risk. Zurich Insurance’ claims data reveals that 15% of all fires in commercial and industrial properties are caused by hot works.*

Poor practices and processes can lead to explosions as a result of sparks coming into contact with flammable gases or combustible dusts and injuries including burns an inhalation of fumes.

To mitigate the risks posed by hot works, organisations need to:

• Fully understand the nature of the works taking place and the specific risks they pose
• Select experienced contractors who will select the lowest risk methods
• Remove all combustible materials from the site vicinity and apply the right controls
• Maintain fire watches during breaks in the day and after hot works have finished
• Establish proper procedures for dealing with an emergency

This is not an extensive list of the measures that can be taken and new technology may help reduce the risks of hot works in the future.

CHANGES TO THE BUILT ENVIRONMENT

More and more organisations, including local authorities and housing associations, are embracing modern methods of construction, (MMC). New technologies are used in the construction of a variety of buildings, from small blocks of flats, to education, health and leisure centres. As construction practices and technology continue to develop rapidly, taller and more complex buildings are being erected using MMC.

The use of MMC can be particularly attractive to local authorities and housing developers looking to construct public buildings and social housing developments in the most effective manner, whilst meeting the latest standards of sustainability and environmental performance. Although there are many benefits of MMC, including reduced costs, minimising waste, ensuring greater consistency in quality standards and satisfying green energy requirements, they can introduce added risks. There is potentially a reduction in resilience when compared with more traditional builds, both during construction and throughout a building’s lifetime.

PRE-FABRICATED DESIGNS

Advances in pre-fabrication are enabling larger and more complex building components to be manufactured off-site and assembled on-site. Ranging from wall panels to whole sections of  buildings, including plumbing and electric fittings, this can make construction quicker, cheaper and more accurate. However, there are additional risks associated with these aspects of MMC. For example, voids between modules can allow fire, water and smoke to spread through a building.

CHANGES OF USE

In the modern built environment, many buildings are changing use which can present new fire risks. As an example, a few years ago there were a number of former refrigerated warehouse units being converted into offices and other uses, but with the original combustible insulation in place. That situation has changed, but there remains the possibility that a similar scenario could emerge as other buildings are re-purposed.