How to Choose High-Quality Stone-Coated Roofing Tiles for Your Construction Project

CONSMOS GROUP

In recent years, stone-coated roofing tiles have become an increasingly popular choice for residential, commercial, and industrial roofing projects around the world. Combining the strength of metal with the aesthetic appeal of traditional roofing materials, stone-coated tiles offer durability, style, and long-term performance.

However, not all stone-coated tiles are created equal. Selecting the right product for your construction project involves a detailed understanding of product quality, material specifications, surface coatings, manufacturing processes, and supplier credibility.

This comprehensive guide will walk you through everything you need to know about how to choose high-quality stone-coated roofing tiles, whether you’re a developer, contractor, architect, or a global importer.

Stone-coated roofing tiles are made of galvanized or galvalume steel sheets that are coated with natural stone granules and sealed with acrylic resin. They are designed to mimic the appearance of traditional roofing materials like clay tiles, slate, or asphalt shingles while offering superior strength and longevity.

Basic Structure:

Base Material: Galvanized steel or galvalume (typically 0.4mm–0.6mm thickness)

Protective Layers: Anti-corrosion coatings (e.g., zinc-aluminum)

Adhesive Layer: Acrylic resin

Stone Chips: Natural basalt or ceramic granules

Topcoat: UV-resistant transparent glaze

Why Stone-Coated Roofing Tiles Are a Smart Choice?

① Durability

High-quality stone-coated tiles can last over 30 to 50 years thanks to corrosion-resistant steel and durable coatings.

② Weather Resistance

These tiles withstand strong winds, heavy rain, hailstorms, and UV radiation without cracking or fading.

③ Lightweight

They weigh much less than clay or concrete tiles (about 6–7 kg per square meter), making them suitable for light structures or renovation projects.

④Aesthetics

Stone-coated tiles are available in a variety of profiles such as Roman, Milano, Shake, Shingle, and Classical, with a broad color palette.

⑤ Energy Efficiency

The reflective coating and air gap design improve thermal insulation, reducing energy costs in hot and cold climates.

⑥ Low Maintenance

Unlike other roofing materials, stone-coated metal tiles resist mold, insects, and algae growth.

Key Factors to Consider When Choosing Stone-Coated Roofing Tiles

① Core Material Quality

nGalvalume steel (55% aluminum, 43.5% zinc, 1.5% silicon) offers 3–6 times better corrosion resistance than GI.

nLook for tiles with AZ150/AZ180 coating standards.

②Steel Thickness

nIdeal thickness for roofing tiles: 0.4 mm to 0.5 mm

nAnything thinner than 0.35 mm compromises structural strength

nAsk for mill test certificates (MTC) for verification

③Stone Chips and Coating

nHigh-quality tiles use natural basalt or ceramic-coated granules that resist UV fading

nLook for uniform granule size and strong adhesion

nPremium tiles use polyurethane or modified acrylic resin that firmly locks granules in place

nA UV-resistant clear coat protects the color and enhances lifespan 

④ Manufacturing Process

Choose suppliers with:

nAutomated coating lines

nStrict quality inspection protocols

nAdherence to ISO9001 or CE standards

nDouble baking techniques to improve coating durability