Modern methods of construction (MMC)

With techniques such as Structural Insulated Panels (SIPs) now commonplace for building the superstructure, cladding is often used to give the desired finish, and to protect these vulnerable components from the elements.

Combustibles – such as timber and polystyrene – often feature in external cladding, and there have been several incidents around the world where fires have quickly spread up the side of buildings as a result. It is therefore important to install firebreaks behind cladding, and limit opportunities for ignition or damage – often achieved by commencing cladding from the first floor upwards.

Brick slips are another popular cladding system. While resistant to fire, it is important that the correct fixing systems are used to prevent these heavy components falling from the building.

Various prefabricated roofing systems are also now available, which can be quickly and easily fixed to make a property watertight. As with cladding, it is important to ensure appropriate fixing methods are used.

'With MMC roofing, wind loads should be given particular attention,' says Andy Penny. 'We have seen several instances where the correct fixing specification has not been used by the contractor, and roofs have literally blown off of buildings.'