Frequently Asked Questions

Below are some answers to some of the things we’re often asked. There’s more detailed information about many of the topics elsewhere on this site and links are shown in the answers.

If you have a query that isn’t covered below then you can ask us directly through the portal on the Contact Us page and someone from our customer services team will be in touch. 

What will it cost?

The cost of a Gerard roof depends on location and the complexity of your home’s design. For a rough idea, visit our cost guide page. This page includes a form for requesting a free quote, which will provide you with an accurate costing.

Will it cost more or less than long-run?

The cost of a Gerard pressed steel roof is similar to the cost of a long-run iron roof and considerably less expensive than a concrete tile roof. If you live in a coastal or high-wind location, a Gerard roof is likely to be less expensive than any other type of roof because it won’t require special materials or fastenings to cope with extreme conditions. For a rough idea, visit our cost guide page.

What are the warranty details?

Like most other building products, Gerard Roofs' warranty is complex and depends on the circumstances of the building. Different aspects of the product are warranted with different terms. The warranty is different if the property is in a standard zone or a corrosive zone.

Most New Zealand homes are build in standard environment zones and in this instances the following terms apply: 

  • 50-year weather-proof warranty – full warranty for first 25 years then diminishing pro-rata warranty for the next 25 years.
  • 20-year textured surface warranty - full warranty for first 10 years then diminishing pro-rata warranty for the next 10 years.
  • 15-year satin surface warranty - full warranty for first 5 years then diminishing pro-rata warranty for the next 10 years.

In addition to Gerard Roofs' product warranties, installation is covered by the Gerard Certified Roofer who installed the roof. Gerard roofs are only installed by Gerard Certified Roofers. Each GCR has responsibility, under New Zealand building law, to make good any problems in the unlikely event they arise.

For more details of how the warranty works, or to download a copy of the warranty certificate itself (showing full details) visit the Warranty page.

Are changes required for coastal or other extreme environments?

If you live in a coastal or high-wind location, a Gerard roof is likely to be less expensive than any other type of roof because it won’t require special materials or fastenings to cope with extreme conditions. 

Will the fascia, guttering and spouting suit the roof?

Gerard roofs are compatible with all major brands of guttering, spouting and fascia. Your Gerard Certified Roofer can help you choose guttering and spouting to suit your home and budget. 

Where can I see example houses?

To find some of the houses in your area with Gerard roofs, see our handy Drive-by Selector.

Can I get a Gerard roof anywhere in New Zealand?

Yes. Gerard is proud of its network of Certified Roofers which spans all of New Zealand. Our Contact Us section will enable you to find one in your area or get in touch with our customer services team who can find a suitable one for you.

Can I drink the run-off water?

Yes. Gerard roofs have been independently tested and the 'run-off' meets World Health Organization guidelines for potable water. 

Do the chips come off?

Many years ago there was a product called Decramastic that gained a reputation for losing its stone chips. Gerard Roofs' reputation was once sullied by association with this (now defunct) product. The roofing material with the problems was a completely different product from a modern Gerard pressed steel roof which suffers no such issues.

Slight shedding may occur at the beginning of the life of your roof. However, the textured finish on Gerard pressed steel panels stays in place very well. It will keep its good looks and protect your roof for a long time. That’s why Gerard Roofs offers a 20-year textured surface warranty in a standard environment zone.

Do the colours fade?

When any material is continuously exposed to the sun, some colour fading is inevitable. However, Gerard’s UV protection technology and special light-fast pigments provide superior resistance against environmental fading and discolouration. Gerard Roofs' satin finish, for example, has a dry thickness of 45 microns - more than twice the 20 microns that pre-painted steel products generally have.

The colour of a Gerard textured roof is derived from the natural colour of the stone granules or ceramic-coated stone granules that make up the surface. These inherently resist fading and discolouration in the same way that rocks do in nature. Read more about Gerard coatings.   

Are Gerard roofs fire safe?

Yes. Gerard steel panels exceed the world’s most stringent fire test standards. They’re also securely interlocked, which prevents hot embers from neighbouring fires blowing up into the roof space. Plus they’re lightweight so, if the fire starts inside the building the roof is less likely to fall on anyone while a house burns. When weakened by fire, a home with a concrete tile roof will crumple much quicker due to its greater weight. See Gerard international stories.

How do Gerard roofs perform in earthquakes?

If you live in an area that’s likely to experience seismic activity, the weight of your roofing material is an important consideration. The area covered by a Gerard satin roof weighing 1 tonne, or a Gerard textured roof weighing 1.7 tonnes would weigh a staggering 10 tonnes in heavyweight concrete or clay tiles.

Major earthquakes in Los Angeles and Japan have shown the combination of heavy tiles on inadequate framing almost always results in serious structural damage. In those events, most deaths and injuries were due to collapsed and damaged roofs. In terms of ‘emotional comfort’ there’s a big difference between a 1-tonne roof and a 10-tonne roof when it’s balanced over the heads of your family. See Gerard international stories.

Where to start
General advice and tips about how to choose a roof and where to look for more information. These common-sense suggestions will help you approach the decision logically and make informed choices.
Re-roofing process
Whatever your choice of roof, the work involved with removing and replacing the one on your home should be done with the minimum of fuss. This page will guide you through how the process works with a Gerard Certified Roofer.
Gerard survives the world’s worst weather
Gerard pressed steel roofs can be found in more than 120 countries. They protect homes in some of the most hostile climates and environments on the planet. Discover some of the extremes your Gerard roof is designed to cope with.
Why a Gerard roof?
The key reasons for choosing the Gerard pressed steel roofing system, including durability, long-lasting good looks, performance in coastal and high-wind environments, low maintenance and the outstanding warranty.
Reasons to choose Gerard
How much would it cost?
This page has a guide to give you a rough idea of what you can expect to pay. Every roof is different so there is no ‘off the shelf’ price as such, but if you want specifics we can provide an accurate quote quickly and without obligation.
Pressed steel roof facts
The technical side of what a Gerard roof is: the design and makeup of pressed steel roofing. How Gerard Roofs fuse layers of high-quality raw materials into a single lightweight product that offers remarkable strength, durability and visual appeal.