In the world of metal roofing, the longevity and efficacy of your roof depend significantly on the materials used and the installation techniques employed. Metal naturally expands and contracts with temperature changes, a fact that is crucial in the design and installation of metal shingles and panels. Unfortunately, many roofing systems fail to consider this essential aspect, leading to increased risk of leaks and premature degradation. Here, we explore the importance of proper fastening systems in metal roofing and why Spengler Industries’ methods are superior.
Understanding Metal Expansion and Contraction
Different metals have different rates of thermal expansion and contraction, which can impact the integrity of a roofing system. Here are some common materials used in roofing and their expansion coefficients:
- Zinc: Zinc expands and contracts at a rate of about 22.2 x 10^-6 per degree Celsius. This relatively high expansion rate requires careful consideration in the choice of fastening to prevent structural stress.
- Stainless Steel: With an expansion coefficient of about 17.3 x 10^-6 per degree Celsius, stainless steel is a robust material that demands secure yet flexible fastening options to accommodate its moderate thermal movement.
- Aluminum: Aluminum’s expansion rate is 23.1 x 10^-6 per degree Celsius, making it one of the more reactive metals under thermal changes. This necessitates a fastening system that allows significant movement.
- Copper: Copper exhibits an expansion rate of 16.5 x 10^-6 per degree Celsius. While it expands less than aluminum, its movements are still considerable over large areas.
- Galvalume: A blend of steel, aluminum, and zinc, Galvalume has an expansion coefficient similar to steel at about 12.0 x 10^-6 per degree Celsius, requiring flexibility in fastening to handle its thermal expansion.
The Downfalls of Direct Fastening
Many traditional metal roofing systems use direct fastening methods, where shingles or panels are nailed right into the roof’s substrate. This approach not only increases the risk of leaks due to punctures but also restricts the natural thermal movement of the metal. Over time, this can lead to the following issues:
- Increased Leak Potential: Each nail hole is a potential entry point for water, especially as the metal expands and contracts, stressing the puncture points.
- Structural Stress: Metals fixed in place without allowance for expansion are more likely to warp or deform, which can compromise the roof’s structural integrity and aesthetic appearance.
- Premature Failure: The combined effects of leaks and stress can significantly shorten the lifespan of a roof, leading to early failure and increased maintenance costs.
Spengler Industries’ Superior Fastening Systems
At Spengler Industries, we employ state-of-the-art indirect fastening clips for shingles and indirect fastening expansion cleats for panels, especially those over 10 feet. Our systems ensure that:
- No Penetration: Our shingles and panels are never penetrated, eliminating leak risks at the source and preserving the integrity of the material. Even our snow abatement systems leave the shingles and panels in pristine condition. No penetration is ever allowed.
- Allow for Movement: By accommodating the natural thermal movement of metals, our fasteners reduce stress on the material, preventing warping and structural damage.
- Longevity and Durability: Our systems significantly outlast traditional methods, thanks to advanced fastening techniques that accommodate the natural expansion and contraction of metal, thus reducing maintenance needs and enhancing resistance to elemental wear.
Why Choose Spengler Industries?
Choosing Spengler Industries means investing in a roofing system designed for durability and performance. Inferior systems that fail to accommodate metal expansion and contraction can lead to leaks, increased repair costs, and early replacement. Our innovative fastening techniques ensure that our roofs are not only more reliable but also provide a maintenance-free solution suitable for any environment.
When it comes to protecting your investment, don’t compromise. Rely on Spengler Industries’ scientifically-backed, meticulously-engineered roofing systems for unmatched quality and longevity. Choose a system that moves with your building, not against it.
Have expansion-contraction questions? Want to avoid metal roof penetrations? Want to learn more about why our systems are superior?
Call us today! 801-462-5264
