How this node works
At the edge the membrane rises up the parapet to under the coping, which protects the top and sheds the water. The ballast is held by a stop, leaving the drainage air free.
Key points
- Slab
- Membrane turned up the parapet
- Parapet
- Coping flashing
- Insulation + ballast
- Gravel stop
Conceptual, language-neutral drawing for study and orientation — not an execution drawing. Dimensions and verifications belong to the designer.