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Galvalume Steel AZ150 AFP ASTM A792M used for Shingle-Style Metal Tiles
Aluzinc/Galvalume steel roof tiles have become increasingly popular in Brazil due to a combination of factors that make them well-suited for the country’s climate, economy, and construction practices. Here's why they are so widely used in Brazil:
1. Climate Suitability:
- Durability in Humid and Coastal Areas: Brazil has a diverse climate, ranging from tropical to temperate, and many regions, especially along the coast, experience high humidity and frequent rainfall. Aluzinc/Galvalume steel offers superior corrosion resistance compared to traditional galvanized steel, which makes it ideal for areas with high humidity, salinity, and exposure to the elements.
- Heat Reflectivity: Aluzinc/Galvalume steel has a reflective surface, which helps reduce heat absorption. In hot and tropical climates, this can significantly lower cooling costs by keeping buildings cooler. This feature is especially important in Brazil, where air conditioning and energy costs are a concern for homeowners and businesses.
2. Economic Considerations:
- Affordability: While stone-coated steel tiles may be more expensive than traditional clay or concrete tiles, Aluzinc/Galvalume steel provides a cost-effective option with a longer lifespan. The durability of the material means fewer repairs and replacements over time, which makes it an attractive choice for cost-conscious consumers.
- Lightweight: Compared to traditional concrete or clay tiles, Aluzinc/Galvalume steel tiles are lighter, reducing transport costs and making installation easier and faster. This also means less structural reinforcement is needed, which reduces overall construction costs.
3. Aesthetic Versatility:
- Aesthetic Appeal: Aluzinc/Galvalume steel tiles are available in various styles and colors that mimic traditional roofing materials, such as ceramic or clay tiles. This allows homeowners to achieve the look of traditional roofing materials while benefiting from the durability and performance of metal.
- Design Flexibility: The versatility of Aluzinc/Galvalume allows for the creation of different tile shapes (e.g., ribbed, shingle, or corrugated profiles), giving architects and homeowners more design flexibility.
4. Environmental Factors:
- Sustainability: Steel is highly recyclable, and Aluzinc/Galvalume roofing materials contribute to sustainability efforts in the construction industry. The energy efficiency of the reflective metal tiles also helps reduce the carbon footprint of buildings.
5. Resistance to Weather Extremes:
- Protection Against Severe Weather: Brazil experiences extreme weather events, such as heavy rains, strong winds, and occasional hail. Aluzinc/Galvalume steel’s strength and resistance to impact damage make it a reliable roofing material in regions prone to such conditions.
In Brazil, Aluzinc/Galvalume steel is manufactured and supplied in various grades and sizes to meet the needs of different applications, including roofing. The specific steel grade and thickness used in roof tiles depend on the intended application, with some variation depending on regional preferences and manufacturer specifications.
1. Steel Grades:
- Grade AZ150 (or Z275 in some regions): This refers to the amount of zinc and aluminum coating on the steel. The "AZ" refers to the aluminum-zinc alloy coating, and "150" refers to the coating weight (150 g/m²). This is the most common grade used for roofing applications in Brazil due to its excellent corrosion resistance and durability.
- Grade AZ100: Sometimes used in non-critical applications, AZ100 has slightly less zinc/aluminum coating compared to AZ150 but is still corrosion-resistant.
- High-Strength Steel (HSS): In some instances, higher-strength steels are used for specific applications that require greater load-bearing capacity, but this is less common for roof tiles.
2. Steel Thickness (Gauge):
- 0.30 mm to 0.55 mm: The most common thickness range for Aluzinc/Galvalume steel roof tiles in Brazil is between 0.30 mm and 0.55 mm. The thicker gauges (0.45 mm to 0.55 mm) are often used for commercial and industrial buildings, while residential roofs may use thinner gauges like 0.30 mm to 0.40 mm, depending on the design and wind load requirements.
- 0.40 mm: A popular choice for residential roofing, providing a balance between strength, weight, and cost.
- 0.50 mm to 0.55 mm: Often used for more durable, heavy-duty applications, or in regions that experience higher wind loads.
3. Tile Dimensions:
- Width: Typically, roof tiles made from Aluzinc/Galvalume steel have widths ranging from 30 cm to 45 cm for individual tiles, although they can vary depending on the profile and manufacturer.
- Length: The length of the tiles is usually customizable but ranges from 100 cm to 150 cm.
- Coverage Area: Each tile covers a certain amount of area, usually between 0.8 m² and 1.2 m² per tile, depending on the profile design and installation method.
Common Roof Profiles:
- Shingle-Style Tiles: These tiles mimic traditional clay or wood shingles and are very popular for residential roofing in Brazil.
- Corrugated or Ribbed Profiles: These are often used in commercial buildings and industrial applications because they provide excellent strength and drainage capacity.
- Tile-Like Profiles: Some manufacturers create tiles that resemble traditional Mediterranean or barrel tile styles, offering a classic look with the benefits of metal roofing.
In summary, Aluzinc/Galvalume steel roof tiles are popular in Brazil due to their durability in humid, coastal, and extreme weather conditions, their energy efficiency, and the cost-effective nature of the material. The common grades used are AZ150 and AZ100, with thicknesses ranging from 0.30 mm to 0.55 mm, depending on the intended application and environmental factors.