🔧 Cleanroom Sandwich Panel Installation: Step-by-Step Guide for Air-Tight, GMP-Compliant Walls

🏗️ Step 1: Foundation Preparation

Requirements:

• Concrete floor must be level (±2mm over 3m)
• Floor must be cured for at least 28 days
• Mark the panel layout on the floor with chalk lines

Critical Checks:

• Verify the floor flatness with a 3m straightedge
• Check the position of embedded anchors and conduits
• Confirm the cleanroom class and pressure differential requirements

🧱 Step 2: Panel Handling and Storage

Storage Rules:

• Store panels flat on a level surface
• Keep panels off the ground with wooden blocks
• Protect panels from moisture with plastic sheeting
• Allow panels to acclimate to room temperature for 24 hours before installation

Handling Rules:

• Use suction lifters or padded clamps — never chains
• Lift panels vertically, not horizontally
• Wear clean gloves to avoid marking the surface

🔩 Step 3: Panel Alignment

Procedure:

1. Start from one corner and work outward
2. Use a laser level to ensure vertical alignment
3. Check the gap between panels — should be uniform (2–3mm)
4. Use temporary bracing to hold panels in position

Critical Checks:

• Panel faces must be flush — no step between adjacent panels
• Use a 2m straightedge to check flatness
• A cleanroom sandwich panel with flush joint​ requires extra precision

🧴 Step 4: Joint Sealing

Materials:

• PU sealant (for cleanroom sandwich panel with flush joint)
• Anti-corrosion primer for cut edges
• Backer rod for wide gaps

Procedure:

1. Clean the joint surface with isopropyl alcohol
2. Apply primer to exposed cut edges
3. Insert backer rod if gap >5mm
4. Apply PU sealant with a caulking gun
5. Smooth the sealant with a spatula for a flush finish

Critical Checks:

• Sealant must be continuous — no gaps or bubbles
• For VHP areas, use VHP-resistant sealant
• A cleanroom sandwich panel with flush joint​ must have a perfectly smooth sealant surface

🪟 Step 5: Door and Window Installation

Procedure:

1. Cut the opening with a diamond-tipped blade
2. Seal the cut edges with anti-corrosion primer
3. Install the door frame with through-bolts and sealing washers
4. Seal the frame-to-panel gap with PU sealant

Critical Checks:

• Door frames must be square (±1mm)
• Use through-bolts, not self-tapping screws
• Seal all gaps — air leakage here will fail pressure tests

🧪 Step 6: Quality Checks

Pressure Decay Test:

• Seal all openings
• Pressurize the room to 50Pa
• Measure the pressure drop over 15 minutes
• Acceptable: <10Pa drop for ISO 5, <20Pa for ISO 7

Visual Inspection:

• Check all joints for sealant continuity
• Check panel surfaces for scratches or damage
• Check door and window alignment

Documentation:

• Record all test results
• Take photos of critical joints
• Keep the cleanroom sandwich panel installation guide​ on site for reference

🏭 SAMZOON: Installation Support

As a cleanroom sandwich panel Foshan​ manufacturer, SAMZOON provides:

• Detailed installation guide​ — a cleanroom sandwich panel installation guide​ with every order
• Technical support​ — our engineers are available for on-site consultation
• Material options​ — cleanroom sandwich panel with rockwool core, cleanroom sandwich panel with stainless steel​ skin, cleanroom sandwich panel with flush joint