Why Put Furring Strips Under Metal Roofing?

Furring strips are wooden or plastic boards installed under metal roofing to create an air gap. This levels an uneven roof deck and provides ventilation, allowing moisture to escape instead of getting trapped, preventing leaks and rust. Why put furring strips under metal roofing? Metal roofs need a smooth base. Furring strips lift the roofing up. This creates an air space that allows airflow. Airflow prevents moisture buildup. Trapped moisture causes leaks or rust. So furring strips protect metal roofs. Furring strips under metal roofing create a gap for airflow, preventing moisture traps that can lead to leaks or rust. This airflow is crucial for maintaining proper conditions and preventing issues like the metal roof affecting cell service.

Installation Process For Furring Strips Under Metal Roofing

When installing furring strips under metal roofing, start by measuring and marking the locations for the strips on the roof deck. Use a level to ensure they are placed evenly. Next, attach the furring strips perpendicular to the roof rafters using screws or nails. Make sure they are securely fastened to provide proper support for the metal panels.

Once the furring strips are in place, you can begin installing the metal roofing panels. Start at one end of the roof and work your way across, overlapping each panel slightly to ensure a watertight seal. Use roofing screws to secure the panels to the furring strips, making sure to drive them into the raised ridges of the panels.

Impact Of Furring Strips On Metal Roofing Warranty

Adding furring strips beneath metal roofing can affect the warranty. Manufacturers often specify installation guidelines to maintain warranty coverage. Improper installation, such as omitting furring strips, might void the warranty. Furring strips facilitate proper ventilation and prevent condensation, crucial for the roof’s longevity. They also ensure a level surface for the metal panels, reducing the risk of damage or leaks. Thus, adhering to manufacturer guidelines regarding furring strips can safeguard your metal roofing warranty.

Environmental Impact Of Furring Strips In Metal Roofing Applications

Furring strips play a crucial role in metal roofing applications, but their use does have environmental implications. These strips often require wood or other materials, leading to potential deforestation and resource depletion. The production and transportation of these materials can contribute to carbon emissions, further impacting the environment. When considering the environmental impact, it’s important to weigh the benefits against the drawbacks. Furring strips can enhance ventilation, reduce condensation, and provide a level surface for metal roofing installation, ultimately improving the longevity and performance of the roof.

Frequently Asked Questions

What Size Furring Strips For Metal Roof? A metal roof, opt for 1×3 or 1×4 furring strips. These sizes offer ample support and ventilation without excess weight. Proper spacing and alignment are key for a sturdy roof. Do You Need Wood Under A Metal Roof? Yes, you need wood under a metal roof. Furring strips provide ventilation, prevent condensation, and align the surface for proper installation. They also reduce noise and enhance the roof’s durability and lifespan. Are Furring Strips Necessary For Metal Roof? Yes, furring strips are necessary for metal roofs. They provide ventilation, prevent condensation, ensure surface alignment, and reduce noise. These benefits improve the roof’s performance and longevity.


Furring strips are an important component for metal roofs. They create an air gap between the roof and deck. This gap allows air to flow. Proper airflow prevents moisture buildup. Trapped moisture leads to leaks or rust. So the air gap protects the roof. Installing furring strips levels out the deck. The strips create a smooth, consistent base. In summary, furring strips protect metal roofs. They create space for airflow. They also create a smooth surface. Smoothness enables good water runoff. Combined, these effects prevent moisture issues. The result is a drier, longer lasting roof. Furring strips are a simple addition. But they make a big difference for durability.