Roofing Sheets: A Comprehensive Guide to Materials and Their Types

A roof is a building's protective shield, safeguarding its occupants from the elements. The choice of roofing material is crucial, influenced by climate, availability of materials, and architectural preferences. When it comes to pitched roofs,various materials are commonly employed, each with unique characteristics and benefits.

Asbestos Cement (AC) Roofing Sheets:

AC sheets consist of a mixture of asbestos fibers and cement. They are manufactured in large sizes, often with corrugations or Trafford patterns for added strength. With a width ranging from 1.0 to 1.2 meters and lengths from 1.75 to 3.0 meters, these sheets are both waterproof and economical. However, they lack thermal insulation properties and are primarily used in warehouses, godowns, and large halls.

Galvanized Iron (GI) Roofing Sheets:

GI sheets are thin, lightweight iron sheets coated with zinc to prevent rust. They are durable, fireproof, and require minimal maintenance. Available in sizes of 1.0 to 1.2 meters wide and 1.65 meters long, they are commonly used for warehouses, godowns, and sheds. However, they can be noisy and have lower fire and acid resistance compared to other options.

Plastic Roofing Sheets:

Corrugated PVC sheets are another option often used alongside AC and GI sheets. They offer natural light transmission,are rust-proof, lightweight, and corrosion-resistant. They also provide fire, chemical, and thermal resistance, making them a hygienic choice. However, they require careful handling to avoid scratches and should be stored properly to prevent damage.

Fiber Roofing Sheets:

Fiber-reinforced sheets come in three main types:

• Fiber-reinforced cement sheets: These sheets withstand harsh weather conditions without compromising quality.Corrugated like AC and GI sheets for enhanced strength, they are resistant to fire, moisture, and termites. They allow diffused light and are virtually maintenance-free.
• Fiber Reinforced Plastic (FRP) sheets: Available in smooth or wrinkled surfaces, FRP sheets are versatile and can be used for purposes beyond roofing.
• Fiberglass Roofing: These sheets come in various sizes and attractive colors. They are known for their ease of installation and are commonly used for factories, cold storages, swimming pools, and terrace gardens.

Comparison: GI Sheets vs. AC Sheets