Metal Multi Tile

Property

Strength

According to CP 89: 2001, there are two common strengths:

• Low strength: G300MPa, minimum yield stress
• High strength: G500MPa, minimum yield stress
• Low strength: G300 is used for casting or severe forming required. Most roofing sheets are manufactured in G550.

Finishes

Coatings

The coating weights of CP 89: 2001 are:

• Zinc/ aluminium 150g/m² total for both surfaces.
• It applies for both plain and prepainted materials.
• Galvanised – 350g/ m² ((total for both surfaces) applies for plain, 275g/m² (total for both surfaces) applies for pre-painted.

Paint

Paint systems for standing seam roofs are:

• Polyesters – organic polymers characterized by relatively hard and abrasion-resistant surfaces.
• Silicon polyesters – organic polymers offer exterior durability, principlally, through chalk resistance and gloss retention.
• Fluorocarbons – vinyl polymers characterized by being both malleable and durable. They are also good for colour retention, heat and chalk resistant. [2]