1. What are the core advantages of using galvanized color-coated steel coils for fencing?
A: There are four main advantages.
High cost-effectiveness: While ensuring sufficient strength and lifespan, its overall cost is far lower than traditional solutions such as brick walls, saving over 50% on material and labor costs.
Aesthetically pleasing and uniform: The surface has a pre-applied colored coating with rich colors (such as blue, white, and gray), maintaining a uniform and clean overall appearance.
Efficient installation: The material is lightweight and can be prefabricated in the factory and assembled on-site, significantly shortening the construction period.
Environmentally friendly and reusable: Highly standardized, it is disassembled, movable, and can be reused 8-12 times, resulting in lower overall costs.
2. What are the main risks during use? How can they be avoided?
A: The biggest risk is buying inferior products, followed by improper installation leading to rust.
Inferior Product Risk: Approximately 60% of low-priced "color steel fencing" on the market actually uses ungalvanized "blackboard" (recycled iron sheets). Once the coating of these products is damaged, they may begin to rust within 7 days, and their lifespan is usually less than 3-8 months.
Improper Installation Risk: Cutting and drilling during installation can damage the galvanized layer and coating at the cuts. If not treated, rust will easily begin from the cuts. In addition, the bottom of the fencing, which is in constant contact with damp ground or standing water, is also a major area prone to rust.
Avoidance Methods:
Strict Material Selection: Reject low-priced products of unknown origin and require suppliers to provide test reports on the weight of the galvanized layer and the thickness of the coating.
Standardized Construction: All cuts and drilled holes must be immediately sealed with zinc-rich anti-rust paint or neutral silicone sealant.
Bottom isolation: Use brick or concrete as a foundation, and install the fence panels on the foundation to avoid directly inserting them into the soil.
3. What are the key points for material selection and construction when applying hoardings?
A: The key points can be summarized as "look at the substrate, thickness, and foundation."
First, look at the "substrate and coating": Proper hoardings should use galvanized steel sheets as the substrate, not uncoated cold-rolled sheets. Suppliers should be required to specify the substrate type and coating composition.
Second, look at the "thickness and specifications":
Zinc coating weight: This is the core indicator for rust prevention. For outdoor hoardings, the double-sided galvanizing amount should not be less than 120g/㎡. In harsh environments such as coastal areas, products with a galvanizing amount of 180g/㎡ or higher should be selected.
Steel sheet thickness: The thickness of hoarding panels is mostly between 0.4mm and 0.8mm, and should not be less than 0.4mm.
Coating thickness: The surface paint thickness should start at least 20-25μm.
4. What are the approximate costs and service life?
A: Costs vary depending on specifications, while service life is directly related to the initial investment.
Price Range:
Material Costs (by ton): Ordinary polyester-coated galvanized color-coated coils: approximately 5800–7200 RMB/ton; higher-end fluorocarbon-coated products: approximately 8500–11000 RMB/ton.
Finished Fencing (by area): Standard galvanized sheet fencing (including base components): approximately 80–130 RMB/㎡; color-coated sheet or thickened products: approximately 90–130 RMB/㎡.
Service Life:
Under normal use: With proper material selection and construction, the service life can generally reach 5-8 years.
5. How to maintain the fencing to make it more durable?
A: Maintenance is simple; the key is "regular inspection" and "prompt repair of minor damage."
Regular Inspection: It is recommended to conduct a comprehensive inspection every quarter, focusing on whether the connecting bolts are loose and whether the coating has scratches or rust spots.
Prompt Repair: If small areas of paint damage or rust spots are found, they should be dealt with immediately. After sanding away the rust, apply a rust-preventive primer first, and then apply a topcoat of a similar color.
Proper Cleaning: Regularly rinse the surface with clean water or a neutral detergent to remove dust and salt. Never use strong acid or alkaline cleaners, as these may corrode the coating.
Post-Use Maintenance: After dismantling, the fencing should be stacked flat, with a height not exceeding 15 layers, to avoid deformation caused by heavy objects, so that it can be reused next time.