Gravel Stop

Definition

A metal flange or strip with a vertical lip placed around a built-up roof to prevent loose gravel (ballast) from falling off the roof.

Purpose

Gravel stops secure the gravel layer on built-up roofs, preventing it from shifting or falling off, thus maintaining the roof's integrity and effectiveness.

Examples of Use

• Flat Roofs: Installed on the edges of flat or low-slope roofs to contain the gravel ballast.
• Commercial Buildings: Used in large-scale roofing systems to ensure gravel remains in place.
• Industrial Facilities: Protecting roofing systems from gravel displacement due to wind or other forces.

Related Terms

• Roof Edge Flashing: A component used to seal and protect the edges of a roof.
• Parapet Wall: A low protective wall along the edge of a roof.
• Ballast: A material used to stabilize roofing membranes and protect them from wind uplift and UV radiation.

Notes

Gravel stops should be checked regularly to ensure they are secure and effective in retaining the gravel ballast, especially after severe weather conditions.