Tianjin Kaida Import&Export Co.,Ltd is one of the leading manufacturers and suppliers of blue galvanised coated roofing sheet in China, featured by quality products and low price. Please rest assured to buy cheap blue galvanised coated roofing sheet from our factory. Contact us for discount information.
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Product Name: |
PPGL |
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Thickness: |
0.12~1.0mm, or customized |
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Width: |
600~1050mm, or customized |
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Length: |
1000~11800mm or customized |
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Zinc Coating: |
Z30~Z275GSM |
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Paint Top: |
12~35 Microns, Paint Back: 5~35 Microns |
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Color Coating: |
All RAL Color |
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Grade: |
DX51D, DX52D,DX53D, SGCC, SPCC |
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Coating Type: |
Top Painted: PVDF, HDP, SMP, PE, PU; Primer Painted: Polyurethane, Epoxy, PE; Back |
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Painted: |
Expoxy, Modified Polyester |
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Standard: |
EN, JIS, GB |
The advantages of blue galvanised coated roofing sheet compared to other colors
The advantages of blue galvanised coated roofing sheet compared to other colors.
The reason why blue galvanised coated roofing sheet can dominate the market is not because of its absolute top performance, but because it has achieved the best balance in multiple key dimensions such as weather resistance, thermal performance, visual psychology, economy, and universality, becoming a classic choice for "all-around". Below, we will compare and analyze them one by one.
1, blue galvanised coated roofing sheet compared to white: a balance between pragmatism and ultimate energy efficiency
·The core advantage of white lies in its highest solar reflectance. It can reflect the vast majority of solar radiation heat and significantly reduce the indoor temperature under the roof in summer, making it the best choice for achieving building energy efficiency and reducing air conditioning load. At the same time, the white board has the best diffuse reflection effect, which can enhance the natural lighting indoors.
·However, the disadvantage of white is very prominent: it is extremely resistant to dirt, and dust in the air, water stains formed by rainfall, and subtle yellowing of coatings that may occur under long-term UV exposure can all be particularly noticeable against a white background. To maintain a clean and beautiful appearance, maintenance and cleaning costs are relatively high. In addition, large areas of white may produce glare under strong light, which is not friendly to the surrounding environment.
·The advantages of blue galvanised coated roofing sheet are highlighted here: although its reflectivity is slightly lower than white, it still belongs to the category of high reflection colors, and blue galvanised coated roofing sheet has good insulation and cooling effects. The most crucial thing is that the blue galvanised coated roofing sheet has excellent stain resistance, and dust and ordinary stains are not easily visible. The blue galvanised coated roofing sheet can maintain a clean appearance for a long time, greatly reducing the visual pressure and psychological cost of maintenance. Therefore, for most ordinary industrial and storage buildings that do not pursue extreme energy efficiency, blue galvanised coated roofing sheet provide a better balance between energy efficiency and maintenance free.
2, Compared to dark colored corrugated boards such as red and green, blue galvanised coated roofing sheet have a bright and stable durability that wins over individuality
·The advantages of colors such as red and green lie in their high recognition and decorative value. Red is traditional and eye-catching, often used in specific industries or to highlight presence; Green is commonly used in agricultural buildings or to coordinate with the natural environment. They can meet personalized aesthetic needs.
·But the inherent shortcomings of these colors are obvious: firstly, in terms of pigment chemistry, many organic red and green pigments have relatively poor UV stability, and are more prone to fading and loss of light under long-term exposure (especially for mid to low end products), which affects long-term aesthetics. Secondly, dark colors have extremely strong heat absorption, which can significantly increase the temperature of the board itself. This not only accelerates the aging of the coating itself, but also conducts more heat indoors, increasing cooling energy consumption.
·The core advantage of blue galvanised coated roofing sheet lies in stability and efficiency: standard blue pigments (such as phthalocyanine blue) have very stable chemical properties, and their weather resistance and color retention are generally better than most red and green colors, which can maintain brightness for a longer time. Meanwhile, the heat absorption rate of blue colored corrugated board is much lower than that of dark colored board, making its thermal performance more friendly. This makes blue a more reliable choice than red and green in projects that pursue long-term durability and reduce overall operating costs.
3, Compared to gray and dark gray, blue galvanised coated roofing sheet is classic and bright, suitable for modern stability and universality
·The gray system (especially dark gray) has been popular in recent years, with the advantage of giving buildings a modern, stable, and high-end visual experience. It is commonly used in high-end industrial parks or public projects that focus on building facades. Its dirt resistance is equivalent to that of blue.
·The limitation of gray system is that its color is darker and absorbs more heat than blue, which has a certain negative impact on thermal performance. In addition, the widespread use of dark gray may make the exterior of the building appear somewhat solemn or even oppressive, which requires good architectural design to resolve.
·The comparative advantage of blue galvanised coated roofing sheet is that it can also reflect a sense of professionalism, but the color tone is brighter and fresher, giving people positive and efficient hints, and has a wider psychological acceptance. In terms of cost, due to blue being the absolute mainstream, the economic benefits brought by its large-scale production are usually better than the relatively niche gray series.
4, Compared with special coatings (imitating wood grain and stone grain), blue color coated corrugated board: positioning of basic functions for high-end decoration
·The goal of special texture coating is completely different. It pursues the ultimate decorative effect, imitates advanced materials to enhance the architectural grade, and is used in occasions with special aesthetic requirements.
·The cost is high, usually several times higher than standard blue. Sometimes, in order to achieve a specific texture, the weather resistance formula of its coating may give way to decorative effects.
·The positioning of blue here is very clear: it is an excellent and cost-effective basic functional building material. Its primary task is to provide reliable protection and a long service life, not decoration. The application scenarios and budget levels of the two are completely different, and blue meets the widest range of basic market demands.
Summary and generalization
In summary, the advantage of blue galvanised coated roofing sheet is not a single champion, but rather its comprehensive performance without any shortcomings:
1. In terms of weather resistance: It is more stable than most bright colors and not easily faded.
2. In terms of thermal performance: It is slightly inferior to white, but far superior to dark colors, achieving a good balance.
3. In terms of visual maintenance: It is more stain resistant than white and brighter than gray, giving people a professional, tidy, and reliable psychological feeling.
4. In terms of economy and market: It is an absolute standard product with the lowest production cost, the most abundant inventory, and the most stable supply, possessing unparalleled scale advantages.
Therefore, choosing blue galvanised coated roofing sheet often means choosing a mature solution that has the lowest risk, highest comprehensive benefits, and can withstand the test of time. It represents a classic wisdom in the field of industrial building materials, with practicality and reliability at its core. The selection of other colors is a targeted choice made under specific conditions, such as extreme energy efficiency, personalized expression, and high-end image.

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