Roofing guide: Earthquake and fire resistance

In a country prone to earthquakes, it’s vital to have a roofing system that not only protects your home, but more importantly - your life and safety. Pressed metal panels are ideal for houses in areas of potential earthquake activity and are also safe in case of fires, because they’re lightweight, and installed using an interlocking system which offers greater security.

Earthquake resistance

Metal panels for superior seismic performance

Metal roofing products are the ideal roofing solution for homes in areas susceptible to seismic activity. Metal panels weigh roughly seven times less than concrete tiles. This significantly lighter material results in smaller inertia forces when your home is rocked by a potentially devastating earthquake.


One of Ross Roof Group's new build projects in the South Auckland suburb of Flat Bush achieved a Terracotta tile aesthetic with lightweight pressed metal panels in Roman. This was chosen over the heavier concrete tiles due to the reduced risk of damage, injury (or worse) during a potential earthquake. For example, during the 2011 Christchurch earthquakes, no major damage occurred on homes with pressed metal panels. However heavy concrete and clay tiles didn’t react as well with some homes seeing a complete loss of their roofs.


As well as superb seismic performance, a lightweight roofing system offers a host of other benefits, including:

  • A weight of less than 7kg/m². Our roofs are a lightweight system, so considerable costs can be made during construction without compromising on quality and durability.
  • Savings on core foundation design
  • The potential to adapt roofing without having to vacate the property
  • Reduced installation times with potentially less disruption to property owners and neighbours
  • Superior durability and performance during extreme weather scenarios
  • There are also phenomenal environmental benefits too. Not only can our steel be recycled time and time again, we also reduce carbon emissions via more efficient transportation costs.


Our roofing systems are installed using an interlocking system which means our panels are individually fixed and less likely to fall through the ceiling during an earthquake. This interlocking and overlapping mechanism also resists wind lifting while keeping out the harsh elements.

Want to find out more about Ross Roof Group's superior earthquake performance? Read our case study blog.rossroofgroup.com

Fire resistance


Ross Roof Group roofs are classified as ‘Class A’ Fire Rated. Known as the Standard Test Methods for Fire Tests of Roof Coverings, the rating includes the fire resistance performance of roofs that have been exposed to simulated fire sources that originate outside a building. This was also proven effective during a fire demonstration hosted in New Jersey by the Middlesex County Fire Academy and company M-Fire Suppression.


Ross Roof Group roofs are classified as Broof (t1), ‘non- spreading fire material’, according to tests done by ITB (Building Institute of Poland) on profiled steel sheets, with procedures given in PN-EN 13501-5+A1-2010. 


Ross Roof Group has gone through a range of international test reports and quality assurance including:

  • CE Mark
  • Miami Dade
  • BBA
  • Florida Building Approval
  • Building Institute of Poland Approval

With its proven ability to withstand the harshest conditions, this demonstrates the trusted and outstanding reputation Ross Roof Group has achieved worldwide.

Even though technology is gradually reducing the risk of fire, it’s vital to employ a material that’s going to keep you and your family safe. Installing a high-quality roofing system on your home is essential to the safety of your property and of course most importantly, to the safety of you and your family.

For more info, please visit www.metrotile.com

Story by: Trendsideas

20 Aug, 2018

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