News & Advice

Pebbles on a Flat Roof

• Protect the roofing material from UV rays and weather, help manage water drainage, and add weight to secure the roof material.

They are commonly used as a protective layer on flat roofs for various reasons…

1. UV Protection – Pebbles act as a barrier, reducing UV exposure and extending the lifespan of the roof.
2. Weight Distribution – Pebbles distribute weight evenly across the roof surface, which is particularly important for flat roofs that may be subject to heavy foot traffic or equipment installation.
3. Thermal Regulation – The pebbles absorb heat from the sun, helping to keep the roof cooler. This can reduce the heat transfer into the building below and alleviate the demand for cooling systems, thus improving energy efficiency.
4. Wind Resistance – The weight of the pebbles helps to anchor the roofing membrane in place, reducing the risk of wind uplift during storms or high winds. This enhances the overall durability of the roof and helps to prevent damage from wind-driven debris.
5. Water Drainage – Pebbles provide a porous surface that allows water to drain away from the roof more effectively. This helps to prevent water ponding and reduces the risk of leaks and structural damage caused by standing water.
6. Fire Resistance – Pebbles are non-combustible and can help to enhance the fire resistance of the roof. In the event of a fire, the pebbles act as a barrier, inhibiting the spread of flames and protecting the underlying roofing materials.
7. Aesthetics – Pebbles can enhance the visual appeal of a flat roof, providing texture and interest to the overall design. They come in various colors and sizes, allowing for customization to match the aesthetic preferences of the building owner or designer.

Overall, pebbles offer many of the same benefits as gravel when used as a protective layer on flat roofs, including UV protection, weight distribution, thermal regulation, wind resistance, water drainage, fire resistance, and aesthetic enhancement. Proper installation and maintenance are essential to ensure the effectiveness and longevity of the pebble layer.