System Logic
Wall Weather Barrier System
Connect the exterior membrane to base flashing, windows, wall penetrations and the drainage cavity so incidental water can leave the wall.
Cladding and drained cavity
Confirm material function, continuity, interfaces and inspection evidence at this layer before it is concealed.
Exterior weather-resistive barrier
Confirm material function, continuity, interfaces and inspection evidence at this layer before it is concealed.
Sheathing, framing and insulation
Confirm material function, continuity, interfaces and inspection evidence at this layer before it is concealed.
Interior air and vapour control
Confirm material function, continuity, interfaces and inspection evidence at this layer before it is concealed.
Design and installation checks
- Install sill flashing before the window
- Lap the upper membrane over head flashing
- Use sleeves or flexible flashing at services
- Keep the base drainage outlet open