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Types of Corrugated Metal Roofing

Jun. 28, 2022

Corrugated metal is a generic term for any type of steel sheet used to reinforce a building by forcing a series of alternating grooves and ridges into it. Technically, this could mean any metal roof or wall panel. However, the industry defines corrugated metal panels as metal roofing or siding panels with S-shaped corrugations and circular corrugations.

 

There are three basic types of corrugated panels: ⅞" corrugated panels, ½" corrugated panels, and all other types of corrugated panels, including ribbed metal roofing panels.

 

⅞" corrugated roofing is the most popular type of corrugated metal roofing panel. The deep corrugation produces a shadow-like effect, so this is the best look for corrugated panels. In addition, it is the strongest and least expensive corrugated panel. The corrugation is 2.67" on center and ⅞" in height. This panel cannot be used on flat roofs. The required roof slope is at least 3" out of 12".

Corrugated Metal Roofing

Corrugated Metal Roofing

 

7/8" corrugated metal roofing coverage and side laps

Total width: 39"

You will have multiple panels on your roof, each roof panel is typically 39" or 37" wide, depending on the manufacturer. The total width of the panels pictured above is 39".

 

Roof overlay 34.67"

A 39" panel will provide 34.67" of roof coverage. If used in a roofing application, the panel must be lapped with two corrugations. The diagram above shows the roof coverage starting at the left edge of the panel and ending with the two corrugations at the far right edge. This means that after you install the first panel, the next panel will have to be lapped with two corrugations. 39" wide panels yield only 34.67".

 

Total Width: 26"

You will have multiple panels on your roof, each roof panel is typically 26" wide.

 

Roof overlay 21.33"

One 26" panel will provide 21.33" of roof coverage. If used in a roofing application, the panels must be lapped with two corrugations. The diagram above shows the roof coverage starting at the left edge of the panel and ending with the two corrugations at the far right edge. This means that after you install the first panel, the next panel will have to be lapped with two corrugations. 26" wide panels yield only 21.33".

Each time you do this, you lose coverage. This means you will have to purchase more square feet than the roof or wall size.

Corrugated Metal Roofing

Corrugated Metal Roofing

 

What you need to know about buying ⅞" corrugated metal roofing

In roofing applications, you will have to purchase 10% to 12% additional corrugated roofing, while in metal siding applications, it will be about 6% additional material.

 

When you purchase corrugated metal roofing, your price is calculated on a per square foot basis by multiplying the width of the sheet by the length of the panel.

 

For example, if you purchase a panel that is 39 inches wide and 10 feet long, it will be 32.5 square feet. You would pay for 32.5 square feet of material, but only 29 square feet of roof coverage. Essentially, you are purchasing 12% more roofing panels.

 

½" Corrugated Roof

1/2" corrugated is the old-fashioned roofing you see in the Old West and ghost towns. This is the original corrugated that has been around for years. However, it's not as common as it used to be because 7/8" corrugated is a much stronger panel and less expensive.

 

The corrugation is 2.67" on center and 1/2" high. The required roof slope is at least 3" out of 12". The panels are typically 26" wide, depending on the manufacturer. Remember, you pay for the entire width of the panel, not the coverage.

 

1/2" Corrugated Metal Roofing Overlay and Side Lap

You will lose coverage every time you perform this operation. This means you will have to purchase more square feet than the roof or wall size.

 

Corrugated Metal Roofing

Corrugated Metal Roofing

 

What you need to know about buying ½" corrugated metal roofing

In roofing applications, you will have to purchase an additional 23% of corrugated metal roofing, and in wall applications, this will be approximately 10% of the additional material.

 

When you purchase corrugated roofing, the price is calculated on a per square foot basis by multiplying the width of the panels by the length of the panels.

 

For example, if you purchase a panel that is 26 inches wide and 10 feet long, it will be 21.67 square feet. You would pay for 21.67 square feet of material, but only 17.77 square feet of roof coverage. Essentially, you would have to purchase 23% more roofing panels.

 

Ribbed Roofing and Other Corrugated Panels

This will cover anything that is not corrugated. These are your square and square metal roofing profiles. We won't go into detail about these, but examples of the most common types are called R Panel or PBR Panel.

 

Learn more about types of corrugated metal roofing, contact us now.

 

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