Tianjin Kaida Import&Export Co.,Ltd is one of the leading manufacturers and suppliers of galvanized corrugated sheet metal 4x8 in China, featured by quality products and low price. Please rest assured to buy cheap galvanized corrugated sheet metal 4x8 from our factory. Contact us for discount information.
Galvanized Corrugated Sheet Metal 4x8 is not only a building material but also an efficient passive heat rejection system. Designed in a standard 4x8 size, this product features 7/8-inch-deep corrugated ribs on its surface, utilizing the material's inherent metallic properties and geometric structure to achieve natural convection cooling.
Technical Specifications
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Product name: |
Galvanized corrugated sheet metal 4x8 |
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Thickness: |
0.12~0.8mm, or customized |
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Width: |
665~1150mm, or customized |
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Length: |
1000~11800mm or customized |
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Grade: |
SGCC/DX51D+Z, DX52D+Z,DX53D+Z, etc. |
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Zinc Coating: |
30-275g/m2, or customized |
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Spangle: |
Regular spangle, Minimized spangle, Zero spangle, Big spangle |
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Treatment: |
Slightly Oiled, Dry |
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Hardness: |
Soft, Full Hard, Half Hard |
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Packing: |
Standard export package |
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Standard: |
EN, JIS, GB |
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Application: |
Building industry, Structural use, Roofing, Commercial use, Household appliance, Industry facilities, Office buildings... |
Advantages
Naturally High Reflectivity
A single sheet can reflect approximately 70% of solar radiation without the need for additional coatings.
Natural Convection Cooling
By leaving an air gap beneath the panels (e.g., a 2-inch gap), hot air rises naturally, creating convection that lowers the temperature below.
Extended lifespan
Lifespan of up to 40 years, with no peeling or degradation.
Chimney Effect Heat Dissipation
When the corrugated ridges are installed vertically, the panels act like small chimneys, drawing hot air upward.
Low cost
Priced at approximately $25 per sheet (based on U.S. building materials market prices), it is cheaper than a roll of inexpensive reflective paint.
Radiation barrier function
When installed over a dark roof, it blocks heat radiation without the need for electronic devices.
Quality Inspection
Packaging & Container Loading
FAQ
Q: Is this unpainted galvanized corrugated metal really cooler than a white roof?
A: Yes, provided the ventilation is well-designed. Actual tests show that in two identical small sheds-one painted white and the other left with bare galvanized corrugated metal-the interior of the metal shed was cooler at 2:00 PM. This is because convective heat dissipation is more effective than simple reflection.
Q: Do I need to paint this sheet metal white?
A: No. For most workshops, garages, and barns, the bare sheet metal is sufficient. If used in extreme climates, you can apply a layer of inexpensive white elastic coating to achieve both high reflectivity and high emissivity, but this is not necessary.
Q: Are these panels heavy? Does installation require a professional team?
A: They are very light, weighing about 30 pounds (approx. 13.6 kg) per sheet, and can be handled by the average person. Installation tools are simple (just a screwdriver and a power drill), so you can install them yourself.
Q: In hot weather, the panels feel very hot to the touch. Does this mean they don't provide insulation?
A: It is normal for the panels to feel hot to the touch, but this actually indicates that they are dissipating heat. Galvanized steel panels have low thermal mass and high emissivity (approximately 0.25 for bright zinc). They do not store heat but release it quickly. If there is an air gap beneath the panels, you will feel a cool breeze-this is the effect of passive heat dissipation.
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