All About Corrugated Sheeting

We have all seen them. Buildings and roofs made from corrugated metal sheets. They have become a commonplace occurrence in building construction. Corrugated sheets are very popular building material. They are used in constructing everything from sheds and buildings to water tanks, plus they are used in manufacturing and hold many other uses worldwide.

They are used for governmental, commercial and domestic use. They have also been used to help develop many countries!The versatility of corrugated sheets is astounding. Because they are so common place we take them for granted never realising the marvel of technology that they truly are.

Corrugated sheets are more amazing than you might think. Check out these interesting facts about the fascinating material below. You will never see the corrugated sheet in the same light afterwards. Let us explain why: What are Corrugated Sheets Made From?

They are made from galvanised corrugated iron (CGI) or steel, PVC, or plastic. The best is the galvanised variety. This lightweight yet strong building material is made of sheets of hot-dipped or electro-galvanized mild steel that is also coated with zinc. It can also be made from a blend of zinc, aluminium, and silicon-coated steel. It is then cold-rolled and folded into ridges or curves, and grooves to produce the famous linear corrugated pattern. This pattern offers the corrugated sheets their amazing strength over small surface areas.

How Did It Get Its Name?


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Corrugated steel was developed by Henry Palmer who was an engineer who worked for the London Dock Company in the 1820s. The corrugated steel quickly became a popular commodity due to its ability to be quickly manufactured and used to build structures with minimal construction skills. The galvanization process was developed by coating the steel or iron in zinc.

This process was simultaneously developed in both England and France in 1837 but was named for Luigi Galvani, after one of the creators. Zinc was chosen for the coating process because it weathers at an extremely slow rate making it longer lasting out in the elements. The added zinc also helps to:

  • Keep the steel strong
  • Give the surface a more pleasing appearance
  • Protect the metal from corrosion.

Strength Of Corrugated Steel


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It is very recognisable when seen but did you know that the pattern has a practical purpose other than just aesthetic appeal? The corrugated signature pattern increases the strength of the material. This offers strength to the sheet horizontally not vertically. For this reason, the sheets are cut wider than they are high.

For all their immense strength and durability, they are surprisingly lightweight and easy to transport. The sheets made today are corrosion, pest, and rust resistant. The protective coating also makes it resistant to moisture intrusion and rot. Mould and mildew do not bother corrugated sheeting due to the lack of organic matter used in the steel.

The corrugating increases the tensile strength of the steel making it the perfect building material for impact strength and heavy weight loads. These sheets are known for their strength and have one of the highest strength-to-weight ratios of any type of building material. This aspect alone makes the corrugated sheeting extremely desirable for roofing and siding. It withstands high impact from winds, rain, snow and hail. The life expectancy of corrugated metal sheeting is up to 50 years.

The sheets are usually manufactured in a thickness range of 0.15mm to 2.0 mm. Width ranges from 800mm to 1560mm. The weight of the zinc involved varies with the thickness of the sheet. Their depth of corrugation is typically12.5mm and 17.5mm. Each sheet usually holds 8, 10, 11, or 13 corrugations.

Economical and Eco-Friendly


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Galvanizing is lower in cost than many other materials. The cost is so low that it makes the corrugated sheeting one of the most popular building materials of all time. It is also nearly maintenance free making them cheaper to manage than most other building materials.

They can last longer than wood or man-made materials which make them an excellent economical choice for property improvement. When used as siding, this material is virtually maintenance free needing only to be cleaned off only occasionally, to remove the buildup of grime, and environmental pollution.

Corrugated sheets are also eco-friendly because they are made from pre-and post- consumer recycled metal. They can be recycled even further after their corrugated life span.

Corrugated steel is a material that could quite possibly replace many of the manufacturing materials on the market today. It is definitely an amazing choice for any building project for both commercial and domestic uses.