Whether you buy color steel roofing sheets for residences, barns, and factories, you need to understand the advantages and disadvantages of different color steel roofing sheets.
Below I will introduce the difference between galvanized steel roofing sheets and galvanized steel roofing sheets
What is galvanized steel roofing sheet?
Galvanized steel roofing sheet is a building material made of galvanized steel sheet, which is widely used in the roof system of buildings. It enhances corrosion resistance and prolongs service life by coating a layer of zinc on the surface of the steel sheet, while maintaining good mechanical strength and workability.
Galvanized steel
The surface coating is mainly composed of pure zinc (Zn), and the coating is usually uniform in thickness and has good corrosion resistance, especially in humid environments. It can form a dense protective layer of zinc oxide.
Advantages of galvanized steel roofing sheet
Corrosion resistance
The zinc layer can prevent the steel sheet from direct contact with oxygen or moisture in the air, forming a protective barrier; even if the surface is scratched, the zinc layer can still provide a certain cathodic protection.
High strength
Galvanized steel has good mechanical properties and can withstand external pressure on the roof (such as wind, snow, ice).
Lightweight
Compared with traditional concrete or ceramic tile roofs, galvanized steel roof panels are lighter in weight, which helps to reduce the structural burden of buildings.
Economical
Galvanized steel sheets are relatively low in cost, low in maintenance costs, and have a long service life. They are an economical and practical roofing material.
Diversity
Galvanized steel roof panels can be made into different shapes (corrugated panels, trapezoidal panels, etc.) through the profiling process and coated with color coatings to meet the needs of different architectural styles.
Which type of roof is galvanized steel suitable for?
Corrugated galvanized steel sheet
The surface is a regular corrugated design, which increases the strength and rigidity of the sheet.
Commonly used in industrial buildings, warehouses and temporary buildings.
Trapezoidal galvanized steel sheet
It has sharp trapezoidal corrugations and stronger bearing capacity.
Widely used in residential, commercial buildings and large factories.
Color-coated galvanized steel sheet (color-coated steel sheet)
Coating a color coating on the surface of the galvanized steel sheet enhances the beauty and durability.
Applicable to construction projects that require decorative effects.
What is a galvanized roof sheet?
Galvalume roofing sheet is a building material made of galvanized steel sheet, which is widely used in building roofing systems. The surface coating is composed of aluminum, zinc and a small amount of silicon, with a typical ratio of 55% aluminum, 43.4% zinc and 1.6% silicon. This combination makes it have both the high temperature and corrosion resistance of aluminum and the cathodic protection characteristics of zinc.
Advantages of galvalume roofing sheet
Super corrosion resistance
The aluminum in the galvalume coating forms a dense aluminum oxide protective film, which can prevent the steel substrate from being corroded.
Even if the coating is partially damaged, the zinc can still provide cathodic protection and delay corrosion.
High reflectivity
The reflectivity of sunlight (heat) is as high as more than 80%, which helps to reduce the heat absorption of buildings and reduce cooling costs.
High temperature resistance
It can withstand high temperatures (about 300°C and above), and the coating will not peel or oxidize even in extreme temperatures.
Suitable for high temperature environments or tropical areas.
Long life
The service life of galvanized roofing sheet is 2-6 times longer than that of ordinary galvanized steel sheet, reducing the cost of replacement and maintenance.
Beautiful appearance
The surface is smooth and has a unique silver-white metallic luster, which is not easy to discolor or age.
Can be further coated with a color coating to enhance the decorative effect.
High strength and lightweight
While maintaining high strength, it is lighter than traditional roofing materials and is easy to transport and install.
Which roof is suitable for galvanized steel?
Corrugated galvanized roofing sheet
The surface has a corrugated design to improve the rigidity and wind resistance of the sheet.
Commonly used in industrial buildings, warehouses and workshops.
Trapezoidal galvanized roofing sheet
The waveform is a trapezoidal structure with a stronger load-bearing capacity, suitable for buildings that require high-strength support.
Widely used in residential, factory and commercial buildings.
Color-coated galvanized roofing sheet (color galvanized sheet)
Color coating is applied to the surface of galvanized steel sheet to increase decorativeness and durability, suitable for high-end buildings.
The difference between galvanized steel roofing sheet and galvanized roofing sheet
| Features | Alu-zinc roofing sheet | Galvanized roofing sheet |
| Corrosion resistance | Better, suitable for harsh environments | Ordinary corrosion resistance, suitable for general environments |
| High temperature resistance | Can withstand higher temperatures | Performance is slightly worse at high temperatures |
| Reflective insulation | High reflectivity, better energy saving effect | Low, average insulation effect |
| Service life | Longer, reduced maintenance costs | Relatively short service life |
| Cost | Slightly higher, but superior cost performance | Low, suitable for projects with limited budgets |