Understanding Roof Thermal Insulation
Everyone knows how hot Thailand’s climate is. Without air conditioning, it would be unbearable to stay indoors. The hottest part that receives the most sunlight is the “roof”.
Most factory or warehouse roofs are made of metal sheets, which can reach temperatures of up to 60 degrees Celsius during the day. If the roof is relatively low with minimal ventilation openings, it essentially becomes an “oven”.
Therefore, new or renovated factories and warehouses install roof thermal insulation to make the interior cooler, allowing employees to work more comfortably.
What is Under-Roof Thermal Insulation?
Roof thermal insulation is a material that helps prevent heat from the roof from entering the building. The material must have a high Thermal Resistance (R-Value). The higher the thermal resistance, the better the heat prevention.
Thermal Conductivity Comparison Table
| Product | Thermal Conductivity (W/m.K) |
|---|---|
| ROCKWOOL Cool ‘n’ Comfort RL | 0.034 – 0.036 |
| SCG and MicroFiber Glass Wool | 0.033 – 0.038 |
| Black Rubber AeroRoof / Maxflex / Armaflex | 0.032 – 0.035 |
| PE Thermal Insulation | 0.025 – 0.029 |
Does Roof Thermal Insulation Really Reduce Heat?
We will show an example using SCG thermal insulation model CRB-G2450 to reduce heat inside a factory
The temperature under the CRB-G2450 thermal insulation is 32.4°C
Temperature in the skylight area is 58.4°C
Temperature under uninsulated roof is 51.7°C
We can see that areas with thermal insulation reduce the under-roof temperature from 51.7°C to 32.4°C, and the roof temperature is nearly 60°C as we predicted.
What Types of Roof Thermal Insulation Are Available?
ROCKWOOL Cool ‘n’ Comfort Thermal Insulation
Cool ‘n’ Comfort is a stone wool thermal insulation from ROCKWOOL available in roll and board forms. It is used for roof thermal and acoustic insulation, such as metal sheet roofs, tile roofs, and concrete rooftops.
Properties of ROCKWOOL Cool ‘n’ Comfort
- Heat Prevention
- Sound Prevention
- Non-Flammable
- Melting Point Above 1,000°C
- Water and Moisture Resistant
- Safe and Environmentally Friendly
| Model | Density (Kg/m3) |
Thermal Conductivity (W/m.K) |
Thickness (mm) |
Thermal Resistance (W/m2.K) |
|---|---|---|---|---|
| Cool ‘n’ Comfort RL920 | 40 | 0.036 | 50 | 1.39 |
| Cool ‘n’ Comfort RL920 | 40 | 0.036 | 75 | 2.09 |
| Cool ‘n’ Comfort RL920 | 40 | 0.036 | 100 | 2.78 |
| Cool ‘n’ Comfort RL940 | 60 | 0.034 | 50 | 1.47 |
| Cool ‘n’ Comfort RL940 | 60 | 0.034 | 75 | 2.21 |
| Cool ‘n’ Comfort RL940 | 60 | 0.034 | 100 | 2.95 |
Actual Product Images of ROCKWOOL Cool ‘n’ Comfort
SCG Roof Insulation
SCG Roof Insulation is an under-roof thermal insulation made of green glass fiber, available in roll and board forms. It effectively provides thermal and acoustic insulation for roofs.
Properties of SCG Roof Insulation
- Green Fibers
- Heat Prevention
- Sound Prevention
- Non-Flammable
- Water and Moisture Resistant
- Safe and Environmentally Friendly
| Model | Density (Kg/m3) |
Thermal Conductivity (W/m.K) |
Thickness (mm) |
Thermal Resistance (W/m2.K) |
|---|---|---|---|---|
| UBB-G1625 | 16 | 0.035 | 25 | 0.714 |
| UBB-G1650 | 16 | 0.035 | 50 | 1.429 |
| UBB-G2425 | 24 | 0.033 | 25 | 0.758 |
| UBB-G2450 | 24 | 0.033 | 50 | 1.520 |
| UBB-G3225 | 32 | 0.032 | 25 | 0.781 |
| UBB-G3250 | 32 | 0.032 | 50 | 1.562 |
SCG Roof Thermal Insulation Installation Images
MicroFiber MicroRoof Under-Roof Thermal Insulation
MicroFiber MicroRoof is an under-roof thermal insulation made of yellow glass fiber, available in roll and board forms. It effectively provides thermal and acoustic insulation for roofs.
Properties of MicroFiber MicroRoof
- Yellow Fibers
- Heat Prevention
- Sound Prevention
- Non-Flammable
- Water and Moisture Resistant
- Safe and Environmentally Friendly
| Model | Density (Kg/m3) |
Thermal Conductivity (W/m.K) |
Thickness (mm) |
Thermal Resistance (W/m2.K) |
|---|---|---|---|---|
| PLN1625 | 16 | 0.035 | 25 | 0.714 |
| PLN1650 | 16 | 0.035 | 50 | 1.429 |
| PLN2425 | 24 | 0.033 | 25 | 0.758 |
| PLN2450 | 24 | 0.033 | 50 | 1.520 |
| PLN3225 | 32 | 0.032 | 25 | 0.781 |
| PLN3250 | 32 | 0.032 | 50 | 1.562 |
MicroFiber Thermal Insulation Installation Images
AERO-ROOF by aeroflex Roof Thermal Insulation
AERO-ROOF by aeroflex thermal insulation is manufactured by Aeroflex. It is an EPDM RUBBER roof insulation with high thermal resistance using only 10mm thickness. It has aluminum foil facing on one side to enhance heat reflection and provides high safety.
Properties of AERO-ROOF Under-Roof Thermal Insulation
- Aeroroof has low water absorption. When roof leaks occur, water drips will not damage the insulation.
- Low and consistent thermal conductivity throughout its service life
- Resistant to weather conditions, ozone, and UV radiation
- Does not become brittle or deteriorate into powder that can cause allergies
- Safe for humans and living beings
- Fire retardant, no dripping when burned, and does not release toxic gases
- Helps increase indoor lighting
| Model | Thermal Conductivity (W/m.K) |
Thickness (mm) |
Thermal Resistance (W/m2.K) |
|---|---|---|---|
| AERO-ROOF | 0.035 | 10 | 0.286 |
AERO-ROOF Thermal Insulation Installation Images
M-PE PE Thermal Insulation
PE Thermal Insulation is made from Poly Ethylene plastic with low thermal conductivity. Available in both flammable and non-flammable types. Being plastic-based, it is dust-free and used for roof thermal insulation.
Properties of M-PE PE Insulation
- Made from Poly ethylene foam
- Available in both flammable and non-flammable grades
- Heat Prevention
- Water and Moisture Resistant
- Safe and Environmentally Friendly
- No fiber dust
- No sound insulation
| Model | Thermal Conductivity (W/m.K) |
Thickness (mm) |
Thermal Resistance (W/m2.K) |
|---|---|---|---|
| PEFR05 | 0.029 | 5 | 0.172 |
| PEFR10 | 0.029 | 10 | 0.345 |
| PEFR15 | 0.029 | 15 | 0.517 |
| PEFR20 | 0.029 | 20 | 0.690 |
| PEFR25 | 0.029 | 25 | 0.862 |
| MIRON05 | 0.025 | 5 | 0.200 |
| MIRON10 | 0.025 | 10 | 0.400 |
| MIRON15 | 0.025 | 15 | 0.600 |
| MIRON20 | 0.025 | 20 | 0.800 |
| MIRON25 | 0.025 | 25 | 1.000 |
PE Thermal Insulation Installation Images
