How the Hy-Grade Systems Conquers Expansion and Contraction
Everything undergoes expansion and contraction when the temperature changes, especially metal.
The Hy-Grade shake is made out of galvanized steel and was designed to be fastened with a smooth shank galvanized nail. Notice both the Hy-Grade shakes and fasteners are galvanized, not two different metals. This eliminates the possibility of the metals oxidizing or corroding over time as all dissimilar metals eventually do over a long enough time period.
The socket in the shake allows the metal to Expand and Contract in all directions around the fastener without pulling on the fastener, which over time would otherwise work it loose. All parts of the Hy-Grade system are designed to allow for Expansion and Contraction as well to prevent loosening of the fasteners.
Our engineered design solves this problem. Our unique expansion socket allows the roofing panels (we call them shakes) to move naturally without putting any stress on the fasteners. Plus, the design sheds water and snow effortlessly, ensuring long-lasting performance no matter the weather.
We use nails to fasten our shakes because they’re stronger and more reliable than screws. Nails have better shear strength, meaning they can handle sideways pressure—like strong winds or temperature changes—without breaking.
Unlike screws, which are more brittle and can snap under pressure, nails are designed to bend rather than break. This flexibility keeps your roof secure and helps it withstand the forces of nature. HERE.
Hy-Grade’s proven and perfected system comes in one design; and one design only! Since 1988 our system has proven its amazing expansion and contraction qualities in Ontario’s temperature extremes. Never once has Hy-Grade been called back for a popped fastener.
