Imagine a sudden downpour pounding against your carefully constructed garage roof. Have you ever wondered whether the coating will withstand years of weather exposure? With countless roofing materials available, how can you select the perfect covering that combines durability with aesthetic appeal for your garage, shed, or garden room?

Before examining coating differences, first consider your desired aesthetic. Do you prefer the classic look of tile-style roofing sheets, the industrial feel of 32/1000 box profile sheets, or the traditional appearance of corrugated or 34/1000 box profile sheets? Visual references can help clarify your preferences.

For metal roofing sheets, PVC plastisol stands out as one of the most durable coating options. These sheets typically last 15-25 years before requiring maintenance, with potential lifespans exceeding 40 years. This reliability makes them ideal for projects prioritizing longevity, though coastal or highly exposed areas may require earlier maintenance.

The coating consists of a tough, flexible polyvinyl chloride-based thermoplastic resin designed with UV resistance. The manufacturing process involves:

• Primer application before coating
• 200-micron leather-textured embossed plastisol on the exterior surface
• Galvanized backing with protective gray passivation coating

This combination delivers exceptional scratch and abrasion resistance, making PVC plastisol a preferred choice in construction. While initially more expensive than polyester options, its extended durability often proves more cost-effective long-term.

Polyester paint coatings offer an economical solution with clean, functional finishes. These sheets typically last 8-12 years before first maintenance, potentially exceeding 20 years in standard conditions. However, their reduced durability compared to PVC requires earlier maintenance planning.

The manufacturing process includes:

• Primer application
• 25-micron high-grade polyester enamel paint on exterior surfaces
• Galvanized backing with protective gray passivation coating

While providing reliable protection, the coating's lower scratch resistance necessitates careful handling during installation. Color options are more limited than PVC, featuring hues like juniper green and light gray that blend well with surrounding structures.

Beyond PVC and polyester, GreenCoat® Pural BT represents a third option balancing durability with environmental responsibility. Under normal conditions, Pural BT coated sheets can protect for up to 40 years—outperforming other coatings.

Available in tile and standing seam profiles, it comes in four distinctive colors: Nordic Night Black, Slate Gray, Tile Red, and Silver Spruce Green. Each sheet features a 50-micron Pural BT layer engineered to resist:

• Scratches
• UV radiation
• Corrosion
• Dirt accumulation

The coating's patented Bio-based Technology (BT) replaces most petrochemical oil with Swedish rapeseed oil, reducing environmental impact while maintaining exceptional weather resistance. This makes GreenCoat® Pural BT ideal for projects prioritizing both sustainability and long-term performance.