What this detail covers
- The joint between two SIP wall panels at an external corner.
- Airtight/watertight sealing lines before the external membrane/cladding.
Key steps
- Apply PU adhesive to the mating faces as shown.
- Run a continuous bead of silicone (typically ~4mm continuous bead) at the shown seal line.
- Bring panels together and fix with SIP screws as per the fixing schedule.
- Maintain breather membrane continuity on the external face per the wall build-up.
Checks
- Corner is plumb/square and pulled tight with no visible gaps.
- Sealant bead is continuous (no breaks at the corner).
- External membranes lap correctly and remain unpunctured where required.
Common mistakes
- “Spot” sealant instead of a continuous bead.
- Over-driving fixings causing local crushing/gaps.
Indicative only: always follow the engineer’s fixing schedule and the project drawings.