some areas of the turf will carry higher load

4.1 Base Preparation

A flat and stable base is essential for even load distribution.

Recommended control points include:

• Base flatness: ≤3 mm deviation under a 3 m straightedge
• Base strength: C25 concrete or equivalent stable construction where applicable
• Proper drainage slope
• Moisture protection when required

If the base is uneven, some areas of the turf will carry higher load, which may accelerate local flattening.

4.2 Material Verification

Before installation, project teams should verify third-party test reports from recognized laboratories such as CMA, CNAS, or equivalent international testing organizations.

Key items should include:

• Yarn modulus
• Fiber recovery rate
• Upright retention
• Yarn pull-out force
• UV aging performance
• Abrasion resistance
• Shockpad compression performance
• Environmental safety indicators

This helps prevent material substitution and ensures the installed product matches the design specification.

4.3 Installation Control

During installation, seams must be smooth and secure. Edge areas should be reinforced to prevent movement or water penetration.

Typical recommended controls include:

• Seam bonding strength: ≥2.5 MPa where applicable
• Flat and stable seam transitions
• Reinforced edge treatment
• Protection against water intrusion into the backing system

Poor seam treatment can create local stress points that accelerate fiber deformation or surface unevenness.

4.4 On-Site Acceptance

Final acceptance should include more than visual inspection. On-site testing may include:

• Fiber pull-out force
• Surface recovery after loading
• Seam condition
• Local support consistency
• Shock absorption
• Vertical deformation
• Surface flatness

This ensures that anti-flattening performance is not only written in the product report, but also delivered on the actual field.