How this node works
All the watertightness of a prefab façade lives in the joints. The line works in two stages: an outer sealant takes the brunt of the rain, but the real seal is the inner gasket, kept dry; between them an open decompression chamber equalises the wind pressure so water is not driven through, and a small drain weeps out what little gets in.
Key points
- Panel A
- Panel B
- External sealant
- Decompression chamber
- Inner gasket
- Drainage
Conceptual, language-neutral drawing for study and orientation — not an execution drawing. Dimensions and verifications belong to the designer.