FAQ

Q: What are the advantages of the "Small Trapezoidal" profile compared to large waves?
A: The small trapezoidal profile provides more ribs per linear meter, which increases the sheet's surface rigidity and makes it more resistant to local impacts. Additionally, the denser ribbing creates multiple channels that facilitate faster water runoff during heavy rain, preventing overflow at the laps.

Q: Is a "Single Layer" UPVC sheet durable enough for outdoor use?
A: Yes. While it is a single-layer structure, our sheets are formulated with advanced UV stabilizers and impact modifiers. This ensures the material remains flexible and strong without becoming brittle or cracking under long-term sun exposure or temperature fluctuations.

Q: Can this product be used in highly corrosive chemical plants?
A: Absolutely. One of the greatest strengths of UPVC roofing is its inert nature. Unlike metal sheets that rust or corrode, our trapezoidal sheets are immune to chemical fumes, acid rain, and salt air, making them the standard choice for the chemical and plating industries.

Q: How does the small trapezoidal sheet handle wind loads?
A: When properly fastened with our matching waterproof screw sets and large-diameter washers, the trapezoidal ribs provide excellent wind resistance. The shape allows for a secure, interlocking overlap that prevents wind uplift, even in coastal or high-wind areas.

Q: What is the maximum purlin spacing recommended for this profile?
A: For our Small Trapezoidal UPVC sheets, we generally recommend a purlin spacing of 600mm to 800mm, depending on the thickness of the sheet and local snow/wind load requirements. Maintaining the correct spacing ensures the roof remains flat and prevents any sagging over time.