Technical Key Points for Phenolic Foam Board Installation

Technical Key Points for Phenolic Foam Board Installation

Substrate Preparation

Ensure structural surfaces are clean, dry, flat and free of contaminants

Remove oil, dust, loose particles (surface deviation ≤3mm/2m)

Prime porous substrates if required

Material Handling

Store horizontally on flat surface under cover

Acclimate 24-48 hours at job site conditions

Handle with care to prevent edge damage

Cutting & Fitting

Use fine-tooth saws or hot-wire cutters for clean edges

Maintain minimum 2mm expansion gap at perimeter joints

Stagger vertical joints in multi-layer applications

Adhesive Application

Apply approved polyurethane adhesive in continuous beads

Minimum 40% board surface coverage

Use notched trowel (10mm×10mm recommended)

Install within adhesive open time (typically 20-30 mins)

Mechanical Fixing

Use plastic sleeve anchors with thermal break washers

Penetration depth: ≥50mm into substrate

Spacing: 300-400mm along edges, 500-600mm field

Countersink fasteners 1-2mm below surface

Joint Treatment

Seal all joints with compatible foil tape or liquid sealant

Ensure continuous vapor barrier in critical applications

Stagger joints between layers (minimum 150mm offset)

Surface Protection

Install protective layer within 14 days of insulation placement

For exposed applications, use UV-resistant coatings

Maintain drainage planes in ventilated systems

Quality Control Checks

Verify adhesive coverage (spot checks)

Confirm proper fastener installation (pull-out tests)

Inspect joint sealing integrity (smoke tests if required)

Document thermal imaging for critical areas

Special Conditions:

Below grade: Use waterproof adhesives and edge sealing

High humidity: Accelerate protective layer installation

Curved surfaces: Pre-bend boards 24 hours prior

Safety Considerations:

Wear PPE (gloves, eye protection)

Ensure proper ventilation when cutting

Follow fall protection requirements for elevated work