Grip and Safety on Steel Roofs: Experience and Design Choices

Grip is a key element of roofing work. As soon as the slope becomes significant, the choice of footwear has a direct impact on the roofer's safety, fatigue, and confidence. Among all types of roofs, steel roofs are among the most demanding, due to their smooth and sometimes hot surface.

In some situations, roofers use sneakers or athletic shoes, whose flat and flexible soles can offer adequate grip on gentle slopes. However, when conditions become more extreme, magnetic grip solutions have emerged as a major advancement for working on metal roofs.

Magnetic Shoes: A Major Advancement for Roofers

Magnetic shoes have represented a real evolution for American roofers working on steel roofs. They have significantly increased grip compared to traditional solutions and have contributed to improving safety on many construction sites. Some pioneering companies have played a key role in making this technology accessible and usable in the field for several years.

As part of the development of the Navail magnetic boot, we carefully studied the existing solutions on the market. This analysis was an integral part of our design process, with the objective of identifying what worked well, but also the limitations encountered in certain real-world conditions.

Observations from Field Tests and Extended Use

During our tests and feedback on previously designed magnetic shoes, several areas for improvement emerged in specific contexts.

Durability in Harsh Environments

In certain configurations, particularly in the presence of screws, sheet metal edges, or sharp objects, we observed that the integrity of the sole could be affected. In some models, the magnets are positioned in cavities within the sole, which means that a thin layer of material is located between the magnet and the outer surface. When this layer is damaged, even slightly, the area can become more vulnerable to wear and tear, particularly given the magnetic forces exerted on a steel roof. Under high heat conditions—a metal roof can exceed 140°F in direct sunlight—the sole material can also soften, altering its mechanical behavior.

It is important to note that these observations are highly dependent on usage conditions and do not call into question the overall value of magnetic footwear, but they have guided our thinking on how to integrate the magnets in a more structural way.

Construction and Assembly

Bonding and stitching assembly techniques are widely used in the footwear industry and offer good results in many contexts. However, we have observed that, depending on the configuration (particularly the presence of a safety toe cap), certain areas of the shoe may be subjected to more stress than others over time.

These design compromises are understandable and reflect specific technical choices, but they have fueled our desire to explore alternative assembly methods.

Comfort on Steep Slopes

In prolonged use on steeply pitched roofs, the posture of the foot and ankle plays a major role in overall comfort. Many magnetic shoes adopt a relatively flat sole geometry, which may be suitable on flat surfaces, but can generate increased stress on the heel and ankle when the roofer is working facing the slope for several hours.

This point is not a defect in itself, but rather a design characteristic that we wanted to address differently.

Durability of Magnets

Neodymium magnets are known for their longevity when used within their recommended temperature ranges. However, roofing environments—direct sunlight exposure, hot metal surfaces, storage in enclosed vehicles—can occasionally lead to high temperatures.

These thermal constraints have been taken into account in our thinking about choosing the most suitable materials and magnet grades for intensive professional use.

Protection against puncture

Roofing work frequently involves the presence of nails, screws, and metal debris. Not all magnetic footwear offers the same level of puncture protection, which can affect overall foot safety in certain situations.

Management of metal debris

Finally, by their very nature, all magnetic soles attract ferrous debris when leaving the roof. Solutions exist on the market to limit this effect, particularly through removable sole protectors. Their effectiveness is real, but their ease of use can vary depending on the design.

The Navail Magnetic Boot Design Choices

Based on these observations, we have dedicated nearly four years to thoroughly redesigning the architecture of a magnetic shoe, with the objective of addressing the constraints encountered in the field.

In the Navail magnetic boot, the magnets are not simply held in place by the sole. They are anchored to a steel plate located above them, deeply integrated into the sole. The sole itself is solid, not hollowed out, which contributes to better structural resistance.

The sole is molded directly onto the upper, without gluing or stitching. It is no longer a matter of assembling distinct elements, but of creating a monoblock structure. This approach makes it possible to integrate a steel safety toe cap without compromising durability.

We have also paid particular attention to comfort on steep slopes. A shock-absorbing heel has been integrated to reduce impacts, improve foot posture, and limit ankle strain during long working days.

Regarding puncture protection, a midsole made of para-aramid fibers (Kevlar® type) covers the entire foot. It is lightweight, flexible, and certified according to ISO EN 12568:2010 and GB/T21147-2007 standards.

Finally, for debris management, we have developed a hands-free magnetic sole protector. It attaches and detaches simply by pressing with the foot, while acting as a magnetic shield limiting debris adhesion.

Conclusion

Classic sneakers or shoes may be suitable in some situations, but offer limited protection. Magnetic shoes have represented a significant advance for roofers working on steel roofs, and have made previously riskier interventions possible. With the Navail magnetic boot, our ambition was not to disparage existing solutions, but to further their development. By rethinking the architecture, materials, and ergonomics, we sought to offer an alternative designed for the most demanding environments, while taking into account the realities of the job site.

Every roofer makes choices based on their needs. Our role is to offer them options that are increasingly better suited to the conditions they encounter.