Aluminium coil materials is designed to withstand wind forces specified in IS 875. Aluminium coil materials has a relatively high coefficient of linear expansion, 0.000024 per degree centigrade. Aluminium coil materials reflects a high proportion of the radiant heat falling on it and, it is largely by radiation through air spaces that heat loss in building occurs. Aluminium coil materials are ideal for premises intended for the storage, handling, and preparation, non-toxic and non-absorbent properties as also its easily cleaned surface. Aluminium coil is proof against vermin and insects. Low temperatures have the effect of improving the mechanical and elastic properties of aluminium. From 0° down to about -73° C, the differences are, however, negligible; at -196° C tensile and yield strengths average 30% and 20% respectively higher than at room temperature. At -268°C these increase to the region of 50% and 35%. Aluminium coil is non-fragile. There is no wastage through breakage or, cracking in transit and during laying of sheet. Aluminium Coil is a non-combustible, non-flammable, and non-sparking material. Aluminium has a high resistance to denting due to its elasticity. Having a density of 2.70gms/cm3. This unique property of aluminium lends itself to finding applications for this metal in corrosive environments in preference to galvanized steel.The pour baix diagram below reveals that aluminium oxide is passive between pH4 and pH8.5 while the corresponding range for zinc is pH7 to pH11. One practical consequence of this is that marine and industrial atmospheres affect zinc more than aluminium.