not all stone-coated tiles are the same created equal
RUST
A corrosion inhibitor coating, such as Aluminum-Zinc, is critical for the long-term performance of the tiles.
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STEEL FAILURE
Many low qualities manufacturers compromise on this by either lowering the AZ coating or using a thinner gauge metal to make the product cheaper.
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STONE CHIP LOSS AND COLOR CHANGE
The BIGGEST single complaint from buyers of cheaper roof tiles is color fade.
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MANUFACTURER’S TRACK RECORD AND QUALITY ASSURANCE
You should question how exactly their warranty process works.
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SUMMARY
See them here
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RUST
The coating on the steel is critical, as it directly effects the durability and performance of the roof tile. Some roofing companies buy cheap steel that sacrifices quality just to save money and if the steel is not of first-class quality, there will always be problems with these coatings. A corrosion-inhibiting coating, such as Aluminum-Zinc, is critical for the long-term performance of the tiles. Sometimes unscrupulous suppliers even sell tiles that use as little as AZ40, providing only very limited resistance to corrosion. The buyer won’t know this for 4 or 5 years, but their roof may begin accelerated corrosion (rusting).
STEEL FAILURE
The roof is arguably the most important part of every building. It represents a significant proportion of the building cost and is a critical part of the overall design, aesthetic and beauty of the building. As with everything people buy, when two products look the same, but one carries a significantly higher price than the other, there is usually a good reason why - one which we can't always see from surface appearance.
STONE CHIP AND COLOR CHANGE
Other stone-coated tiles compromise by using painted stone chips that quickly fade or are soft enough to lose shape or pulverize. Today, the world's biggest companies have developed their own acrylic-based coating technology. The Intellectual Property of their acrylic coatings is a closely guarded secret because it is one of the key differences between products. Making a tile look good when it’s new is easy; clever technology keeps the tiles looking good for 30, 40, or 50+ years.
MANUFACTURER'S TRACK RECORD AND QUALITY ASSURANCE
The majority of manufacturers offer a 50-year warranty, and while major suppliers offer limited, comprehensive warranties, unknown brands may offer a 50-year warranty without any specific conditions. Example: If there is a problem, how can you be sure you’ll get your money back, or who will pay for the installation if the roof needs replacing?
If the company has only been making products for a few years, ask how they can offer a 50-year warranty when the product has not been around for anything close to this long.
SUMMARY
1. Stone chips should not come off the tile surface; There has to be a strong adhesion of the stone chips to the steel surface. It should conform to ASTM D522, which is the 180-degree mandrel test. The basecoat should be able to keep the stone chips properly attached;
2. Roof tiles should be rigid, not flimsy, to avoid being easily twisted. Thin metal can also quickly cause dents during and after roof installation;
3. Always look for a trusted brand. This logo is every company’s mark of excellence. Every tile would have a production date and other pertinent manufacturing details that would quickly help in identification and quality control.
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“I was told that the product I purchase had a 50-year warranty, but when rust appeared after 4 years I went back to the people that sold it to me and they said they no longer used that manufacturer and they could not help me. The next year I had to replace my whole roof.”

"I was told that all stone coated roofs were the same and the only difference was price, but within six (6) months, a lot of the stones had fallen off my roof. After 2 years, the color was unrecognizable. When I tried to complain to the supplier, they were no longer in business."

"During delivery, we noticed that the tile was not rigid and a bit flimsy compared to the other branded tile samples we received. We were told that despite this, it was a comparable quality tile at a cheaper price. The hurricane came and significantly damaged our roof. The product was so thin that the nails tore away from the tile."

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