Cleanroom Sandwich Panel Failures: 10 Common Problems and How to Prevent Them
? 1. Core Delamination
Symptom
The cleanroom sandwich panel surface bulges or separates from the core after 6–12 months.
Causes
Moisture ingress through unsealed edges
Low-density core (rockwool <100 kg/m³)
Poor adhesive bonding during manufacturing
Prevention
Specify a cleanroom sandwich panel with rockwool core at ≥120 kg/m³
Ensure all cut edges are sealed during installation
Buy from a cleanroom sandwich panel Foshan manufacturer with quality control
? 2. Rust at the Joint
Symptom
Brown streaks appear at the cleanroom sandwich panel joint line within 12 months.
Causes
Galvanized steel skin with damaged coating
Exposed cut edges without sealing
Condensation in cold rooms
Prevention
Use a cleanroom sandwich panel with stainless steel skin for VHP/washdown zones
Seal all cut edges with anti-corrosion primer
For cold rooms, use a cleanroom sandwich panel with PIR core with proper vapor barrier
? 3. Air Leakage at the Corner
Symptom
Pressure decay test fails; particles enter through the corner gap.
Causes
No cleanroom sandwich panel with flush joint at the corner
Missing sealant at vertical joints
Poor corner profile design
Prevention
Use radius corners with cleanroom sandwich panel with flush joint
Apply PU sealant at every vertical joint
Follow the cleanroom sandwich panel installation guide for corner details
? 4. VHP Whitening
Symptom
The cleanroom sandwich panel surface turns white or chalky after VHP cycles.
Causes
Standard PVDF paint cannot handle VHP
Low-quality coating with poor adhesion
Prevention
Specify a cleanroom sandwich panel with antimicrobial coating or cleanroom sandwich panel with stainless steel skin
Verify coating chemical resistance with the supplier
? 5. Panel Bow / Warping
Symptom
The cleanroom sandwich panel is not flat; doors and windows no longer align.
Causes
Core density too low
Panel width too large for the core thickness
Uneven temperature during installation
Prevention
Use a cleanroom sandwich panel with magnesium oxide core for high-load walls
Keep panel width ≤1150mm
Store panels flat and allow temperature acclimation before installation
? 6. Thermal Bridging at the Joint
Symptom
Condensation forms on the cleanroom sandwich panel joint in cold rooms.
Causes
Aluminum frame conducts cold
No thermal break in the joint system
Prevention
Use a cleanroom sandwich panel with PIR core with thermal-break frame
Ensure proper vapor barrier at joints
? 7. Edge Chipping During Installation
Symptom
The cleanroom sandwich panel edge is damaged; the core is exposed.
Causes
Thin steel skin (<0.4mm)
Careless handling with forklifts or chains
Prevention
Specify ≥0.5mm skin thickness
Use proper lifting points as per the cleanroom sandwich panel installation guide
? 8. Poor Fire Performance
Symptom
Fire test fails; the cleanroom sandwich panel core burns or releases toxic smoke.
Causes
EPS or low-grade PIR core
Missing fire-stop at panel joints
Prevention
Use a cleanroom sandwich panel with rockwool core or cleanroom sandwich panel with magnesium oxide core
Install fire-stop sealant at all joints
? 9. Bacterial Growth on the Surface
Symptom
Swab test shows high bacterial count on the cleanroom sandwich panel surface.
Causes
No antimicrobial treatment
Surface roughness >0.8µm
Prevention
Use a cleanroom sandwich panel with antimicrobial coating
Specify smooth skin finish (Ra ≤ 0.8µm)
? 10. Documentation Failure
Symptom
The cleanroom sandwich panel batch cannot be traced; GMP audit fails.
Causes
Supplier provides no mill cert, coating report, or fire test certificate
Prevention
Buy from a cleanroom sandwich panel Foshan manufacturer with full documentation
Request mill certs and fire test certificates before ordering
? 6. SAMZOON: Failure Prevention Partner
As a cleanroom sandwich panel Foshan manufacturer, SAMZOON provides:
Quality-controlled production — every batch tested for density, adhesion, and fire rating
Full documentation — mill certs, fire test certificates, coating reports
Installation support — a cleanroom sandwich panel installation guide with every order
Material options — cleanroom sandwich panel with rockwool core, cleanroom sandwich panel with magnesium oxide core, cleanroom sandwich panel with stainless steel skin, cleanroom sandwich panel with antimicrobial coating
