Roof Shade ｜ Passive Cooling System for Industrial Roofs – Reduce Temperature Without Electricity

In Thailand, where the average annual temperature exceeds 33°C, factories and warehouses constantly face the challenge of heat accumulation under metal roofs.

This excessive heat affects employee comfort, equipment efficiency, and leads to increased energy consumption and higher electricity bills.

The Roof Shade System offers an innovative solution — a non-powered Air Mesh Type Heat Shielding System that effectively lowers indoor temperature using natural airflow ventilation, without any need for electricity or active cooling equipment.

Key Features of the Roof Shade System

• Reduces indoor temperature without electricity.
• Natural ventilation design promotes continuous airflow under the roof.
• Aluminum-coated reflective mesh blocks radiant heat.
• Non-absorbent, dust-resistant, and long-lasting durability.
• Compatible with various roof types – Metal Sheet, Fiber Cement, and Polycarbonate.
• Ideal for Green Factory and Sustainable Warehouse applications.

Heat Challenges in Thai Industrial Buildings

Factories and warehouses across Thailand often experience excessive indoor heat, especially those using metal sheet or fiber cement roofs that absorb solar radiation directly.

This results in indoor temperatures significantly higher than the outside environment.

Consequences include:

• Increased machinery workload.
• Higher energy consumption from air conditioning and ventilation systems.
• Decline in worker comfort and productivity.
• Escalating long-term energy costs.

Technical Cause of the Problem

Most industrial roofs lack proper sub-roof ventilation, causing solar heat to accumulate beneath the roof and gradually radiate into the workspace.

Although some facilities install insulation materials such as foam or fiberglass, these materials degrade over time due to humidity, dust, and wind, leading to reduced thermal efficiency after just a few years.

Technical Solution: Roof Shade System

Roof Shade is an Air Mesh Heat Shielding System based on the principle of Natural Airflow Ventilation.

It allows trapped hot air under the roof to escape naturally, creating a continuous air circulation layer without the need for fans or power.

Main Components:

1. Heat Reflection Mesh – Aluminum-coated mesh that reflects infrared radiation and prevents heat absorption.
2. Air Gap Design – Creates a ventilation channel between the roof and mesh for natural airflow heat dissipation.
3. Lightweight Structure – Easy to install, suitable for both new construction and retrofit projects.
4. Maintenance-free Design – Non-absorbent, dust-resistant, and durable for long-term use.

Recommended Applications

The Roof Shade System is ideal for buildings exposed to direct sunlight and high internal temperatures, particularly where energy-free temperature control is desired.

Suitable for:

• Factories, warehouses, logistics centers, and agricultural buildings.
• Facilities seeking to reduce air conditioning and fan energy loads.
• Continuous production areas or high-temperature work zones.
• Roofs made of metal sheets, fiber cement, or polycarbonate.

Installed beneath the roof, the system forms an air circulation layer that efficiently expels trapped heat, reducing indoor temperature and improving overall thermal comfort.

Performance Benefits

• Reduces indoor temperature by 3–7°C (depending on roof type and airflow).
• Decreases air-conditioning and ventilation load.
• Saves energy and lowers electricity costs in the long term.
• Extends roof and equipment lifespan.
• Supports Green Factory, ESG, and Sustainable Building initiatives.

Frequently Asked Questions (FAQ)

Q1: How is Roof Shade different from conventional insulation?

A: Unlike insulation, Roof Shade uses natural ventilation instead of heat absorption, making it resistant to degradation from humidity or dust.

Q2: Can it be installed on existing roofs?

A: Yes. It can be retrofitted under the existing roof structure without removing the original roofing.

Q3: Does it require electricity or fans?

A: No. It works entirely through natural air circulation — 100% passive cooling.

Q4: How long does the system last?

A: The aluminum-coated mesh is UV-resistant, weatherproof, and lasts over 10 years without cracking.

Q5: What types of buildings are suitable?

A: Factories, warehouses, logistics hubs, or production facilities looking to reduce indoor heat without increasing power usage.

Glossary

• Heat Reflection: Reflecting solar infrared radiation to reduce heat absorption.
• Natural Ventilation: Airflow created by natural wind pressure and temperature difference.
• UV Resistance: Material durability against ultraviolet rays without cracking or fading.

Summary

The Roof Shade System is a passive cooling solution that effectively reduces industrial roof heat without using electricity.

It helps lower energy costs, improve working conditions, and enhance operational efficiency while promoting sustainable building and Green Factory initiatives.

Perfect for industrial zones and hot regions — especially Thailand’s EEC (Eastern Economic Corridor).

Contact Murakami (Thailand) Co., Ltd.

For consultation and on-site assessment.

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Updated: November 3, 2025