Stone coated metal roofs have gradually become the mainstream of roof tiles in recent years, but what are their drawbacks? Today, I will give you a comprehensive explanation of this roofing material.
1、 Disadvantages of Stone Coated Metal Roofs
（1） The problem of sand falling caused by uneven quality
The quality of stone coated metal roofs on the market varies greatly, and purchasing low-quality tiles may encounter sand falling problems. Falling sand not only affects the aesthetics of the roof, causing it to become mottled and lose its original delicate appearance, but also seriously damages the protective performance of the roof.
The main reason for sand falling is due to defects in the production process. Some unscrupulous manufacturers may cut corners in the production process in order to reduce costs. For example, in the treatment of stone coating, the temperature and time of high-temperature sintering were not strictly controlled, resulting in insufficient adhesion between the colored sand and the metal substrate; Or use low-quality colored sand, which has insufficient hardness and uneven particles, and cannot firmly adhere to the substrate. With the passage of time and the erosion of the external environment, such as wind, sun, and rain, these low-quality colored sands will gradually fall off.
（2） Rust risk caused by thin aluminum zinc coating
Aluminum zinc coating is a key protective layer for stone coated metal roofs, which can effectively resist the erosion of the metal substrate by the external environment and extend the service life of the roof. However, if the aluminum zinc coating is relatively thin, it will greatly increase the risk of tile rusting.
When the aluminum zinc coating is too thin, moisture can easily penetrate the coating in a humid environment and react chemically with the metal substrate, leading to rusting. Especially in coastal areas, where the salt content in the air is high, or in areas with frequent acid rain, corrosive substances can accelerate the loss of coatings, exposing metal substrates to corrosive environments faster. Once the metal substrate begins to rust, it not only reduces the structural strength of the roof and affects its service life, but may also lead to problems such as water leakage on the roof, causing unnecessary losses to users.
（3） Stone coated metal roofs are expensive
The price of stone coated metal roofs is indeed higher compared to some traditional roofing materials such as asphalt tiles and ordinary color steel tiles. This is mainly due to its complex production process and high-quality raw materials. It is made of high-quality aluminum zinc coated steel plate as the substrate, and undergoes strict pretreatment processes to ensure the cleanliness of the plate surface, laying a good foundation for subsequent coating adhesion. The surface stone coating is made of selected natural ore or artificial colored sand, which is firmly attached to the metal substrate through high-temperature sintering technology. This process not only enhances the aesthetics of the tiles, but also endows them with excellent durability.
2、 Advantages of Stone Coated Metal
（1） High cost-effective long-term investment
Although the initial investment is large, in the long run, its long service life brings significant cost advantages to users. In general, the service life of high-quality stone coated metal roofs can reach 30-50 years, which is several times longer than many traditional roofing materials. This means that within decades of use, there is no need to frequently replace the roof, greatly reducing long-term maintenance and replacement costs, making it an extremely cost-effective long-term investment choice.
（2） Convenient installation and low-cost construction
In terms of installation, stone coated metal roofs demonstrate great convenience. Its weight is relatively light, which makes the handling and installation process easier and can effectively reduce labor input. Meanwhile, tiles usually adopt standardized design and have good modular characteristics, which can be installed through simple splicing and fixing methods. A skilled construction team can quickly and efficiently complete the laying work, greatly reducing the construction period.
The shortened construction period not only means that the project can be delivered and used faster, but also significantly reduces construction costs. The construction party does not need to occupy construction equipment and human resources for a long time, reducing equipment rental costs and labor expenses. In addition, the simple installation process reduces the difficulty of construction, minimizes potential construction risks and errors caused by complex installation, and further saves potential additional costs.
In summary, the advantages of stone coated metal roofs are prominent, but there are also some potential issues. As a professional manufacturer, SKW is always committed to strictly controlling product quality, adopting advanced production processes and high-quality raw materials to ensure that every tile has excellent quality. At the same time, we also remind our customers that when choosing stone coated metal roofs, they must carefully select suppliers, pay attention to product quality testing, and avoid purchasing inferior products for the sake of short-term cheapness, so as to fully enjoy the long-term value brought by this high-quality roofing material.