Choosing the right roofing material is critical for any industrial construction project, especially for facilities such as factories, warehouses, and workshops. These structures often face harsh environmental conditions, including extreme temperatures, corrosive chemicals, and heavy loads. Selecting a roofing solution that offers long-term durability and performance is essential to avoid frequent maintenance and costly replacements.
Industrial buildings commonly encounter challenges like corrosion in coastal or chemical-rich environments, excessive heat in tropical or desert climates, and structural strain from machinery or stored goods. These issues demand high-performance materials that can withstand specific stressors.
Among the innovative solutions available today are TSP (Film Coated Steel) and ASP (ASA+PVC+Steel Composite) steel roof sheets. Both products are engineered to address the shortcomings of traditional roofing materials while offering tailored benefits for different industrial needs.
Understanding the core structure of these two roofing systems helps clarify their distinct advantages.
Material Layers in TSP Steel Roof Sheets
A TSP film-coated steel sheet consists of a film bonded to a steel sheet. The film creates an airtight seal with no micro-holes, completely protecting the steel from all corrosive media. The TSP film itself is made from a modified polyester that is transparent and highly resistant to both corrosion and high temperatures (up to 165–170°C). It uses a specially developed adhesive researched by JIELI over five years.
Material Layers in ASP Steel Roof Sheets
ASP steel roof sheets are an innovative composite product, combining the advantages of ASA, PVC, and steel. Unlike painted color steel sheets, ASP uses ASA and PVC films for surface protection. The ASA layer provides UV resistance for color stability, while the PVC contributes to heat insulation and chemical resistance.
How Composition Affects Performance in Harsh Environments
The airtight sealing of TSP prevents penetration by corrosive agents like salt or acid rain, making it ideal for chemical plants or coastal areas. In contrast, ASP’s multi-layer composite structure provides a balanced profile of good corrosion resistance, superior impact strength, and excellent thermal insulation properties.
TSP roofing excels in some of the most demanding industrial applications.
Corrosion Resistance in Coastal and Humid Regions
TSP can resist all kinds of acid, alkaline, and salt corrosion, making it highly applicable for seaside buildings, chemical factories, food factories, water treatment plants, farming, and mining. This makes it a superior choice where rusting is a major concern.
Heat and UV Resistance for High-Temperature Areas
TSP film-coated steel sheets can be used in high temperatures of 165–170°C, which makes them suitable for extremely hot climates where traditional coatings fail due to thermal expansion or degradation.
Structural Strength and Load-Bearing Capacity
While ASP’s multi-layer composite design gives it greater overall impact resistance, TSP maintains excellent structural integrity for standard purlin spans in industrial settings, with its strength determined by its base steel layer.
Sound and Thermal Insulation Benefits
Although primarily designed for corrosion resistance, TSP’s polymer film contributes marginally to sound dampening compared to bare metal sheets.
ASP sheets are engineered for versatility across multiple performance categories.
Multi-Layer Protection with ASA, GI Steel, and PVC
With an ASA covered surface and a PVC bottom, ASP provides heat and sound insulation, resists rust and chemical corrosion, and offers long-lasting color. This makes it an all-in-one solution combining aesthetics with functionality.
Enhanced Impact Resistance for Harsh Industrial Environments
With a steel base, the ASP roof sheet can bear more weight, offers better impact resistance, and supports a longer truss span (purlin distance). It is ideal where roof panels must endure physical stress from equipment or weather events like hailstorms.
Fire Retardant Properties for Safety Compliance
The ASP Steel sheet’s steel base is difficult to ignite, with a fire rating of Class A. This meets stringent fire safety standards required in many industrial zones.
Lightweight Design for Easy Installation
Despite its strength-enhancing steel core, ASP sheets are available in thicknesses like 0.4mm–0.8mm, making them relatively lightweight for easy installation.
When choosing between TSP and ASP sheets for your factory roofing needs, consider your industry type.
Ideal Roofing Solutions for Factories and Manufacturing Plants
Chemical plants and facilities with high concentrations of corrosive agents benefit most from TSP’s superior corrosion resistance. For general manufacturing plants or metal processing units where a combination of heat resistance, impact strength, and good corrosion protection is needed, ASP is often the more versatile solution.
Suitability for Warehouses and Storage Facilities
Warehouses demand thermal regulation for stored goods. ASP’s heat insulation qualities make it preferable here over traditional color-coated metal sheets.
Application in Agricultural Structures
Both materials offer value here—TSP resists the ammonia-rich environments found in animal sheds, while ASP offers the load-bearing strength needed on barn roofs exposed to heavy snow or wind pressure.
Geographic climate plays a key role when selecting your roofing solution.
Performance in Hot Climates: Middle East, Africa, Central Asia
In these regions, UV resistance and heat insulation are critical. ASP’s ASA layer protects color for 8–10 years under intense UV exposure, making it a reliable option.
Adaptability to Humid or Coastal Zones: Southeast Asia, Latin America, Europe
For these environments, anti-corrosion technology is vital. TSP film-coated steel has passed CNAS corrosion tests with no rust after 168 hours of exposure, proving its resilience against marine air and acid rain.
Financial considerations are crucial when planning infrastructure investments.
Initial Investment vs. Long-Term Maintenance
Though initial costs may be higher than basic painted metal sheets, both TSP and ASP offer reduced maintenance cycles due to their protective layers, saving money over time on repairs and repainting.
Service Life Expectations and Durability
Our warranty for ASP Steel roof sheets is 15 years, with real-world service life often more than 30 years.
Ease of installation significantly affects labor costs during construction.
Weight and Purlin Spacing Requirements
ASP generally supports longer purlin distances due to its composite strength. Purlin spacing can reach up to 1500mm depending on the profile design.
Customization Options: Lengths, Colors, Thicknesses
All Jieli roofing products can be customized by color and length. Thickness options for ASP typically range from 0.4mm to 0.8mm.
Jieli brings decades of manufacturing excellence and innovation since 1992.
Company Background and Global Reach
Jieli, founded in 1992, is one of the leading manufacturers of advanced roofing solutions in China.
Product Innovation and Certifications
Our products hold CNAS and UL testing certifications, and Jieli operates its own government-authorized testing laboratory.
Project Experience: Mining Sites, Pharmaceutical Factories
We have supplied roofing solutions for many major projects, including Agrosuper pig farming projects (Chile) and the Venezuela government housing project (2012).
Q1: What is the main difference between TSP and ASP steel roof sheets?
A: TSP uses an airtight polyester film on galvanized steel, offering exceptional corrosion resistance. ASP combines ASA, PVC, and Steel, providing a balance of corrosion protection, structural strength, and added insulation benefits.
Q2: Which roofing sheet is better suited for hot climates?
A: Both perform well under heat, but ASP stands out with its ASA layer offering superior UV protection and thermal insulation, making it ideal for the Middle East and Africa.
Q3: Can I customize the length or color of my roofing sheets?
A: Yes—all Jieli roofing products allow customization of color and length based on your project requirements.
+86 0535 6278701 / +86 15653505862 
