The Prefabricated heat-insulating metal sheet roofing systems with built-in PE (5 mm) and PU (1 inch) insulation are widely used in various settings, such as factories, greenhouses, warehouses, and residential buildings, to reduce indoor temperatures caused by sunlight. However, after a period of use, common issues include brittleness, flaking into dust, and health hazards to users. Additionally, the installation process is often complicated and involves multiple steps, resulting in high labor costs (refer to Table 1: Comparative test data on the properties of prefabricated insulated metal sheet roofing systems).

In response to these challenges and feedback from customers, Aeroflex Co., Ltd., a subsidiary and a leading manufacturer of synthetic rubber (EPDM) insulation, saw an opportunity to develop an improved product building upon its previous Aero Roof solution—a pre-insulated under-roof material already available in the market.

The new product integrates 5 mm thick Aero Roof insulation directly with a metal sheet roof, using a proprietary production technique developed by Aeroflex that ensures a smooth and durable bond. This innovation eliminates the need for multi-step installation processes and enhances user safety. The result is the Aero Metal Rooftop, which offers five key advantages:

1. Outstanding heat reduction performance – Can lower indoor temperatures by 9–15°C compared to pre-installation conditions.
2. Minimizes dust and cracking issues – As the product contains no plastic-based components, it avoids brittleness and flaking over time.
3. High safety standard – Certified for fire resistance under UL94 HB standard.
4. Superior sound insulation – Reduces indoor noise during rainfall by up to 29 dB.
5. Easy installation – Significantly reduces labor costs due to its simplified installation process.
6. Aero Metal Rooftop product and installation example in a residential setting

Aero Metal Rooftop product and installation example in a residential setting. Aero Metal Rooftop pilot installation at Nikom Phatthana Hospital, Soi 8, Rayong Province

In Fiscal year 2024/2025, Aeroflex conducted a pilot market launch of the Aero Metal Rooftop, generating pre-launch sales of 73,100 THB. The company anticipates that sales will continue to grow and the market will expand steadily in the future.

Currently, the product is undergoing testing for adhesion to metal sheets and durability using an aging test chamber, which simulates real-world environmental conditions equivalent to 10 years of usage by controlling temperature and humidity. Test results are expected by Q2 of fiscal year 2025/2026.

In addition, Aero Metal Rooftop has received the Carbon Footprint Label from the Thailand Greenhouse Gas Management Organization (Public Organization - TGO). The product’s greenhouse gas emissions are measured at 1.22 kg CO₂ equivalent per square meter, and it can help reduce average energy or electricity consumption by approximately 7.5% per year compared to buildings without the installation of Aero Metal Rooftop.

Comparative Test Data on the Properties of Prefabricated Insulated Metal Sheet Roofing Systems

Feature	Aero Metal Rooftop Aero Roof (5 mm) + Metal Sheet	PE Metal Sheet PE (5 mm) + Metal Sheet	PU Metal Sheet PU (1 inch) + Metal Sheet
Thermal conductivity coefficient (K-Value) – Lower values indicate better performance	0.0410 W/m.K	0.0468 W/m.K	0.0486 W/m.K
Water absorption	6.44 %	833.05 %	905.69 %
Flame spread rating (UL94 HB)	Qualified	Unqualified	Unqualified
Sound reduction performance	Excellent	Fair	Good
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Remark

K-Value: refers to the thermal conductivity coefficient, indicating the level at which a material conducts heat. A lower K-Value means better insulation performance.

Water absorption: refers to the percentage of water absorbed by the material. A higher value indicates greater water absorption capacity.

UL94 HB: is a horizontal burn test under the UL94 flammability standard, used to assess the material’s resistance to flame spread in a horizontal position.