Cladding
Cavity batten problem
The drained cavity is a key weathertightness element for many residential cladding systems.
What it looks like on site
- Battens missing, blocked, wrong orientation, wrong fixing, or not aligned with cladding
- Cavity closer missing
Possible causes
- Wrong system
- Rushed pre-cladding work
- Installer unfamiliar with product
- Openings/junctions not detailed
Immediate action
- 1Make the area safe first. Stop only the affected workface if continuing could make the issue unsafe, hidden, or harder to fix.
- 2Take wide, medium, close-up, and context photos before anything is moved or repaired.
- 3Check the latest consented drawings, specification, RFI responses, site instructions, and inspection requirements.
- 4Tell the responsible subcontractor what you have found and ask for their proposed correction in writing if the issue affects quality, cost, time, or compliance.
Step-by-step fix
- 1Identify the exact location using room name, gridline, elevation, peg, manhole number, footing line, or drawing detail reference.
- 2Compare the site condition with the approved documents and manufacturer instructions.
- 3Decide whether the fix is simple workmanship correction, RFI, engineer/designer direction, minor variation, amendment, or council inspector discussion.
- 4Agree the person responsible, repair method, hold point, and reinspection evidence before work resumes.
- 5Complete the repair, photograph the corrected work, and update the defects/RFI/variation/inspection register.
- 6Record programme impact, cost impact, and who was notified in the daily report.
What not to do
- Do not cover, backfill, line, clad, tile, paint, or pour over the issue to keep the programme moving.
- Do not approve a technical fix verbally when structure, moisture, drainage, fire/safety, H1, or consent compliance may be affected.
- Do not rely on memory. Record the drawing revision, detail number, photos, people contacted, and agreed next action.
Source / Where to check
Check E2/AS1, consented wall/roof details, cladding specifications, flashing details, and manufacturer installation requirements.
Use the exact current installation manual, warranty requirements, BRANZ/Appraisal information where applicable, and product data sheet for the product on site.
The issued consent drawings, stamped specifications, engineering drawings, RFIs, minor variations, and amendments control the specific project.
Insufficient data to verify — check the consented drawings, project specification, relevant NZ Standard, or council requirement.
Inspection impact
If the issue affects an inspection area, record whether the inspection must be delayed, rebooked, failed item closed, or discussed with the council inspector. Do not conceal the work until the inspection/evidence requirement is satisfied.
Example wording for daily report
Cavity batten problem: issue identified at [location]. Work paused in affected area. Photos taken. Checked [drawing/spec/RFI]. Contacted [person/company]. Agreed action: [fix]. Inspection/programme impact: [impact]. Follow-up due [date].
