The combined properties of three metals
Gerard pressed steel roofing begins with the strength and resilience of New Zealand steel, coated on both sides with a protective layer of aluminium-zinc. This powerful alloy combines the sacrificial protection of zinc, as used in galvanising, with the natural barrier protection of aluminium. In almost every environment, Gerard pressed steel roofing provides superior performance and a significantly longer service life than galvanised steel roofs.
Pressed to shape before sealing with polymer acrylics
Satin finish - coating layers
Textured finish - coating layers
Gerard steel tiles are primed and pressed to shape before the final protection layers are applied. This avoids the problem of micro-cracking, which can occur in the bends of products pressed from pre-painted steel. Finishing top coats are baked on to ensure a consistently even coating. For our satin finish tiles, a 45-micron topcoat of ultra-tough polymer acrylic is applied. This is more than twice the thickness of the paint on typical pre-painted steel products. Our textured tiles are finished with a polymer bonding basecoat, granulated natural stone and a clear acrylic overglaze. The result is a powerful combination of nine protective layers.
Horizontal fastening for maximum holding power
Most roofing systems are attached using vertical fastenings. Their weakest holding direction is parallel to the vertical lifting forces created when high winds pass over a roof, like air over an aircraft wing. Gerard pressed steel tiles, however, are designed for horizontal fastening. This is the strongest holding direction, because it is at right angles to the lifting forces. Plus there are eight to ten fasteners holding down each Gerard tile. Where whole neighbourhoods have lost their roofs in storms, Gerard roofs have held fast and continued to protect their owners.
Devastation was widespread in this Jamaican hurricane. Roofing material was removed by the extreme wind uplift forces. The house with the Gerard roof remained intact.
During a major Californian bushfire, this suburb was in flames, passed from roof by flying embers. Most homes with steel tile roofs escaped.
Interlocking steel membrane for added fire protection
Fire can quickly spread from house to house, as flying embers find their way into the roof space of one house after another. Gerard pressed steel roofs have proven their fire resistant qualities in many fierce blazes. They exceed the world’s most stringent fire test standards and are securely interlocked to significantly reduce the chance of flying embers entering the roof space.
A load off your mind in earthquake areas
With their combination of light weight and superior strength, Gerard tiles can place significantly less stress on structures weakened by earthquake or fire. For example, a 10 tonne concrete or clay tile roof area could weigh as little as one tonne with Gerard satin finish tiles, or 1.7 tonne with Gerard textured tiles. Either way, it’s a very reassuring difference when the earth starts to move.