Gravel erosion (scouring) on flat roofs

Roofing · Modified Bitumen · printed page 24 (PDF page 25)

Book index entries

Erosion of Gravel on Flat Roofs Erosion of Gravel Gravel Erosion on Flat Roofs Scouring of Gravel on Flat Roofs Wind Scouring on Flat Roofs Built-up Roofing

Text in the illustration

gravel scouring can occur at the windward corner of roofs or where downspouts discharge onto flat roofs
loss of gravel can lead to quick deterioration of the roof membrane
wind

Generated explanation

The illustration shows a gravel-covered flat garage roof adjoining a taller house with a pitched roof. Bare patches expose the roof membrane at a windward corner and beneath a downspout that discharges directly onto the flat roof. A wind arrow and dashed circles identify the areas subject to gravel scouring. The annotations explain that loss of protective gravel can lead to rapid deterioration of the roof membrane.