Why Do Commercial Roofs Have Gravel?
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Gravel is used for protection against UV rays, and fire resistance, and to add weight to stabilize the roofing material.
Gravel on commercial roofs serves multiple purposes…
- Weight Distribution – It evenly distributes the weight of rooftop equipment, preventing damage to the roofing membrane and underlying structure.
- Wind Uplift Resistance – Gravel ballast provides extra resistance against wind uplift, securing the roofing membrane during high winds.
- UV Protection – Gravel shields the roofing membrane from UV radiation, extending its lifespan by reducing weathering and deterioration.
- Fire Resistance – Non-combustible gravel enhances the roof’s fire resistance, acting as a barrier against the spread of flames.
- Thermal Mass – Gravel’s thermal mass properties help regulate temperature fluctuations on the roof surface, stabilizing indoor temperatures and reducing energy consumption.
- Aesthetics – Beyond functionality, gravel ballast can enhance the roof’s appearance, giving it a uniform, finished look that blends well with the surrounding landscape.
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