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Considering a Metal Roof? Understand the Structural Implications First

Considering a Metal Roof? Understand the Structural Implications First

When it’s time to replace your roof, you might be tempted by the sleek look and durability of metal roofing—a popular choice for its longevity and modern aesthetic. But before you make the switch from traditional tile, it’s crucial to understand the structural implications.

The Weight Difference.

One of the most significant differences between tile and metal roofing is weight. Tiles can weigh as much as 55kg per square meter, while metal roofing materials often come in at a lighter 5kg per square meter. This drastic difference means that your home’s structure, which is accustomed to supporting heavier tiles, may react differently to a metal roof, particularly in terms of wind uplift.

Structural Upgrades.

A recent structural adequacy inspection of a property intending to replace hail-damaged tiles with metal sheeting revealed that while the existing structures could theoretically handle the “downwards” load of the new roofing material, the capacity for “uplift” in windy conditions was not up to current standards. This suggests that additional engineering measures may be necessary to ensure the structural integrity of a building transitioning to a lighter roofing material.

Recommendations for Roof Upgrades.

Tie-Down Strategies: Upgrading from roof tiles to metal may require reinforcing the roof’s tie-down capacity. For instance, replacing existing strap clout nails with more robust self-tapping screws can provide better anchoring.
Mid-Span Bridging: For metal purlins, the introduction of mid-span bridging can compensate for the uplift force, particularly if the purlins are found to be simply supported.
Engineering Assessment: An expert assessment is paramount to determine the exact upgrades needed for the roof framing to handle the new metal roofing, ensuring compliance with current standards for both downward loads and uplift wind loads.


Replacing your roof with metal sheeting is more than just an aesthetic upgrade; it’s an investment in your home’s future. Ensuring that your house is structurally sound to support this new material is critical. By considering the necessary structural reinforcements, you safeguard your home against the elements and maintain its integrity for years to come.

Are you ready to transition to a metal roof? Contact us today to ensure your home is prepared for not only a new look but a secure future. Our team of experts is ready to guide you through the necessary steps for a successful roofing upgrade.

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