Stone coated roof tiles are lightweight roof system materials.

Historically, metal roofing products lacked the style, beauty and design versatility required for the residential sector. This all changed in 1957 when an innovative manufacturing process bridged the gap between industrial durability and architectural beauty.

Today, metal roofing is the second most popular roofing material on the market and its many benefits are no longer limited to the industrial sector.

Galvanized Steel Sheet

The high-grade steel used in SANGOBUILD products is treated with a hot-dip metallic coating composed of 55% aluminum, 43.4% zinc and 1.6% silicon.

Both aluminum and zinc have excellent anti-corrosive properties, but they work even better when combined together.

For example, a coating of 100% zinc (also known as galvanized steel) provides exceptional bare-edge protection for cuts and drilling. But, 100% zinc coatings are what engineers call “sacrificial,” meaning that corrosion will eventually find its way into the steel sheet over time.

That is why SANGOBUILD uses an advanced aluminum-zinc alloy coating that protects up to four times longer than traditional galvanized steel. When the zinc’s sacrificial barrier breaks down over time, the more durable aluminum component in the alloy ensures that an effective corrosive barrier is still present.

While the aluminum and zinc alloy components combine to provide outstanding corrosion resistance, the silicon in SANGOBUILD’s formula ensures the protective steel coating remains firmly fixed to the steel. Silicon also allows for bending during the manufacturing and installation processes.

It’s important to note that not all aluminum-zinc alloys are created equal.

For example, AZ50 is the minimum industry quality standard for coating thickness and specifies that there is a minimum coating weight of 50 grams per square metre on both sides of the steel sheet.

Some manufacturers products using a cheaper AZ35 alloy – a much thinner coating that is highly susceptible to degradation by corrosion, especially when installed on roofs in a salt-air rich environment, such as coastal areas.

Acrylic Resin Coatings

SANGOBUILD uses a state-of-the-art acrylic resin coating applied on both sides of the aluminum-zinc alloy hot-dip steel coils.

The brown-tint or clear resin coating is specially formulated to resist fingerprints and scuffing during product handling. The acrylic resin coating also provide the ideal surface for adhering the stone granules to the base steel sheet.

Stone-Coated Granules

SANGOBUILD’s stone-coating manufacturing process bridges the gap between industrial durability and design versatility.

Adding stone granules allows SANGOBUILD to produce a wide range of roofing styles, colors and textures that replicate the look of traditional roofing materials such as asphalt shingles, tile or wood shake.

Our sand is from the same supplier of Owenscorning and Roser with the ceramic coating technology. Carlac uses the highest quality rocks and selects granules that can take and hold long-lasting ceramic coatings. As part of the manufacturing process, Carlac bonds colored pigments to the base mineral via the ceramic coating that covers the granule. This process improves color retention and helps the granule withstand even the harshest of weather conditions.