| Structure of sheet | Thickness (mm) | Weight (kg/m2) | Standard value (W/m2k) | Transparency Clear (%) | Minimum bending radius（mm |
|---|---|---|---|---|---|
| Widths * Lengths | 1.22m X 2.44m, 2.1m X 5.8m, or cut to customers | ||||
|
Twin Wall Polycarbonate Sheet
|
4 | 0.90 | 3.96 | 80 | 700 |
| 6 | 1.30 | 3.56 | 78 | 1050 | |
| 8 | 1.50 | 3.26 | 76 | 1400 | |
| 10 | 1.70 | 3.02 | 73 | 1750 | |
| 12 | 1.90 | 2.78 | 72 | 2100 | |
| Type | Colors description |
|---|---|
| Transparent | Clear, Bronze, Gary, Blue, Green, Orange, Red |
| Translucent | Lake-Blue, White, Glass Green, Yellow, Light Bronze |
| Opaque | White, Opal, Dark Bronze, Dark Gray, Cream, Dark Blue |
| Physical Properties | Testing Method | Unit | Value |
|---|---|---|---|
| Specific Gravity | D-792 | g/cm3 | 1.2 |
| Light transmittance | D-1003 | % | >76 |
| Heat deflection temperature (HDT) | D-648 | °C | 140 |
| Service Temperature – Short-term | °C | -50 to +120 | |
| Service Temperature – Long-term | °C | -40 to +100 | |
| Impact falling dart | ISO 6603/1 | J | 40-400 |
| Tensile Strength at Yield | D-638 | Mpa or N/mm² | >60 |
| Tensile Strength at Break | D-638 | MPa or N/mm² | >65 |
| Coefficient of Linear Thermal Expansion | D-696 | mm/m °C | 0.065 |
| Thermal Conductivity | C-177 | W/m K | 0.21 |
| Elongation at Break | D-638 | % | >100 |
| Tensile Modulus of Elasticity | D-638 | MPa | 2400 |
| Flexural Strength | D-790 | MPa | 100 |
| Practical thermal expansion/contraction | mm/m | 3 |
| Type | Dimensions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
Thickness（mm） |
4 |
6 |
8 |
10 |
12 |
|||||
|
Light transmission |
80% |
78% |
76% |
73% |
72% |
|||||
The light transmission of different thicknesses
( Standard： clear general purpose polycarbonate sheet )
1. What Is the Life Expectancy of Twin Wall Polycarbonate?
Twin wall polycarbonate sheets usually last for about 10 to 20 years. If you buy a high-quality sheet with UV protection, it can last even longer. In the past 15 years, and under perfect conditions, they might even last up to 25 years. How long your sheet lasts depends on the weather, how well it was installed, and its specific features. A good way to know is to check the warranty. Many companies offer a 10 or 15-year warranty, which shows you how long they expect it to last.
2. Can Polycarbonate Sheets Be Used for Walls?
Yes, polycarbonate sheets are an excellent material for wall applications in many situations. Both solid and multi-wall sheets can be used.
3. How Strong Is Twin Wall Polycarbonate?
Twin wall polycarbonate is incredibly tough. It's so strong that it's considered almost unbreakable—about 250 times stronger than glass. This means it can easily handle bad weather, such as heavy rain, hail, or high winds. Because it's so durable and safe, people use it for things like roofs, greenhouses, and dividing walls.
4. What Thickness Polycarbonate Should I Use for Roofing Applications?
Choosing the right thickness for your polycarbonate roof is simple. For small projects like a patio cover or a pergola, a thinner sheet from 4mm to 8mm is usually fine. If you're building something bigger, like a carport or a lean-to roof, you'll want something a bit thicker, around 10mm to 16mm. For the most challenging jobs, like a conservatory or an industrial roof that requires great strength and insulation, you should use the thickest sheets—20mm, 25mm, or even thicker.
To pick the right one, think about how big your roof is, how strong the frame underneath is, and what kind of weather you get.
5. Which Is the Better Material for Greenhouse Roofing Between Corrugated Vs. Twin Wall Polycarbonate?
For a greenhouse roof, twin-wall polycarbonate is almost always the better choice. It's much better at keeping your plants' temperature just right because it holds heat well. It's also stronger and protects plants from too much sun, making it perfect if you want to grow things year-round.
Corrugated polycarbonate, the wavy kind, is another option. It costs less and can be easier to put up. However, it doesn't hold in heat as well, can make your greenhouse too hot in the summer, and might become weak and crack over time. So, while corrugated can save you money upfront, twin-wall is the best investment for a healthy, year-round greenhouse.
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