August 13, 2025 | Case Studies

Heat-Tested White HDPE Ground Mats

CASE STUDY
Heat-Tested Ground Protection: How White HDPE Mats Preserved Turf for 11 Days in 99°+ Conditions
Overview
In extreme summer heat, protecting grass in high-traffic or muddy areas requires a mat that can stand up to the elements. That’s where white ground protection mats shine. For job sites, event setups, or landscaping projects that require temporary ground protection without turf damage, Cope Plastics put our white HDPE ground protection mats to the test under real-world, high-temperature conditions.
The goal? To prove that white mats not only provide the durability and load-bearing capacity of traditional HDPE, but also reflect heat and preserve live grass for extended periods.
Background & Objective
In July and August, many regions experience high heat, frequent storms, and soft, saturated ground—creating a perfect storm of job site challenges:
  • Unstable surfaces that require heavy-duty temporary roadways or work pads
  • The need to protect turf for homeowners, venues, or municipalities
  • Extreme heat that accelerates grass burn and kills landscaping
Cope Plastics designed this turf trial to answer a key question:
How long can white HDPE mats be left on grass in extreme heat before causing damage?
Test Conditions
  • Material Tested: White HDPE ground protection mat (vs. traditional black HDPE mat)
  • Test Duration: 11 consecutive days
  • Temperature Range: 85–99°F daily highs
  • Sun Exposure: Full sun, no shade, no irrigation
  • Surface: Healthy, live turf
  • Location: Alton, Illinois
Each mat was placed on a separate patch of grass and monitored daily for turf condition and surface heat.
Results Summary
White HDPE Mat Performance
  • Days 1–3: Grass beneath the white mat remained green and healthy—no heat damage observed.
  • Day 4: Light signs of stress appeared, but turf showed signs of bounce-back.
  • Day 7: Small patches began to show more permanent signs of heat exposure.
  • Day 11: Grass under the mat was fully dead—concluding the threshold for long-term placement.
Black HDPE Mat Comparison
  • Noticeable heat retention after only a few hours.
  • Grass showed severe burn damage within the first 24 hours.
  • Surface temperature was significantly higher than the white mat under identical conditions.
Key Takeaways for Project Managers & Field Supervisors
  • White HDPE mats are proven to extend turf protection for at least 3 days—even in triple-digit heat.
  • Ideal for temporary roadways, event flooring, landscaping access paths, and staging pads in turf-sensitive environments.
  • White mats reduce surface temperature by reflecting sunlight, which minimizes stress and damage to the turf below.
  • After day 7, limited grass damage begins to occur, making this a powerful short-term solution for summer months.
  • White HDPE mats are just as durable, reusable, and lightweight as traditional HDPE mats.
Best Use Cases for White HDPE Mats
  • Construction sites working near finished lawns or park-like environments
  • Golf courses hosting events or heavy equipment setups
  • Event rental companies installing tents, walkways, or flooring in grassy areas
  • Landscapers and tree trimming crews accessing backyards or tight green spaces
  • Utility and telecom crews working in neighborhoods or school campuses
When to Choose Black HDPE Mats
While white mats shine in turf-sensitive, heat-intensive conditions, black HDPE mats still offer superior value and performance in other environments:
  • Long-term projects on non-vegetated surfaces
  • Construction zones without active landscaping
  • Uneven, rugged terrain requiring extra traction
  • Cooler weather or single-day installs on grass
  • Jobs requiring a more cost-effective ground protection solution
Final Thoughts
This case study confirms that white HDPE ground protection mats offer a high-performance, heat-reflective solution when grass preservation matters. For crews navigating summer mud, saturated lawns, or sensitive sites, these mats provide peace of mind—and protect your client’s property investment.
With the strength of HDPE and the cooling power of white, these mats fill the gap where black mats reach their limit.
Need Help Choosing the Right Ground Protection Mat?
Let our team guide you. Whether you’re protecting turf, building a temporary road, or staging equipment, we’ll help you find the best material for your jobsite conditions.

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