Colour-Coated Roofing Sheets
High-Tensile Galvalume & Pre-Painted Steel Cladding Profiles
Engineered for Performance & Long-Term Reliability
Yatee Roofing Sheets are roll-formed from premium 55% Aluminum-Zinc alloy coated steel (Galvalume) and pre-painted with advanced multi-layer coating systems (SMP, RMP, and PVDF). Designed with high crest trapezoidal ribs, our roof and wall profiles deliver exceptional water discharge capacity, span capability, and long-term colour vibrancy.
Key Technical Features
Deep Anti-Capillary Groove
Precision-engineered side lap return prevents water siphoning under torrential monsoon downpours.
High-Yield Steel Substrate
550 MPa minimum yield strength allows greater purlin spans with zero panel sagging.
Superior Thermal Reflectance
High Solar Reflectance Index (SRI) coatings reflect solar heat, keeping building interiors cooler.
Multi-Coat Paint Systems
20-25 micron topcoat over anti-corrosive primer provides 25+ years UV color durability.
Standard Specifications & Material Properties
Colour-Coated Roofing Sheets Parameters
Compliant with IS 800, AISC 360, MBMA and ASTM standards
| Parameter / Feature | Standard Specification | Design Code / Standard |
|---|---|---|
| Base Metal Substrate | High-Tensile Steel (Yield Strength: 550 MPa) | AS 1397 / ASTM A792 |
| Metallic Coating | Galvalume (55% Al, 43.4% Zn, 1.6% Si) AZ150 (150 g/m²) | IS 15965 / ASTM A792 |
| Paint System | Regular Modified Polyester (RMP) / Silicon Modified Polyester (SMP) / PVDF | IS 14246 |
| Top Coat Thickness | 20–25 Microns over 5 Micron Primer | ISO 2808 |
| Back Coat Thickness | 7–10 Microns Grey Epoxy Primer | ISO 2808 |
| Profile Width / Pitch | 1060mm Overall (1000mm Cover Width), 250mm Pitch, 30mm Crest Height | Standard Profile |
| Sheet Thickness | 0.45mm, 0.50mm, 0.55mm, 0.60mm (TCT) | Standard Gauge |
Available Dimensions & Standard Ranges
Manufacturing Process & QA Gates
Coil Quality Inspection
Testing coating thickness, cross-hatch paint adhesion, and pencil hardness.
Multi-Station Roll Forming
Continuous cold roll-forming with hardened chrome-plated rollers for scratch-free profiling.
Flying Shear Cut-to-Length
Precision hydraulic cutting ensuring clean, burr-free edges without coating fracture.
Protective Guard Film & Packing
Application of temporary peel-off PE protective film to safeguard sheets during transport.
Typical Industrial Applications
Frequently Asked Questions
Galvalume uses an alloy of 55% Aluminum and 43.4% Zinc, which offers superior barrier protection against atmospheric corrosion and lasts 4 to 6 times longer than ordinary galvanized zinc sheets.
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Download technical brochures, section modulus tables, and CAD profiles.
Download Data Sheet (PDF)