Our proprietary formulas for Gerard Stone coated steel metal tile roofing panels are built to stand the test of time. Since developing our durable roof tiles over 50 years ago, production processes and equipment has evolved, but we have never strayed from using only the highest quality raw materials and proprietary formulated coatings.
26-Gauge Base Steel
Gerard panels are made from the best quality structural grade steel. They are rigid enough to tolerate reasonable loads while allowing profile designs without the risks of cracking or significant elastic recovery. They are composed of 30% recycled steel.
Hot Dipped Zinc-Aluminum Alloy Galvanized Coating
The first barrier of protection on our rigid steel panels is achieved when the steel passes through a bath of molten aluminum-zinc alloy. This coating combines the protection and strength of both aluminum and zinc. Developers of our particular aluminum-zinc alloy coatings have captured exposure data indicating corrosion protection of the underlying steel exceeds 50 years in most environments.
Acrylic Priming System
An acrylic coating is applied to both sides of the panel after the application of the aluminum-zinc coatings to further enhance the longevity of the galvalume coating and underlying steel, and provides a uniform substrate that enhances the adhesion of the additional coatings.
Our base coat is a petroleum base with a highly UV resistant proprietary acrylic resin binder. This specially formulated coating is proprietary to Gerard. A generous base coat is poured (not sprayed) onto the tile before quality granite and ceramic colored chips are bonded into the wet base coat. The base coat serves as a base color and bonding agent for the stone granules, and offers a further level of protection from both water and air to the underlying acrylic and galvalume coated steel.
Ceramic Coated Stone Granules
A protective coating and attractive appearance is provided by stone granules. They further enhance the resistance to UV light while providing an array of colors. These ceramic coated granules are sized and applied in such a way to insure maximum coverage of the base coat; and adds another layer of protection against weather erosion.
An acrylic over glaze with UV inhibitors is applied as a final coating that gives the granules a semi-gloss appearance. This extremely durable acrylic finish bonds to the granules and encapsulates them with a coating that enhances the panel’s resistance to physical damage.