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GI / Corrugated Roofing

Grades, sizes and the unit each material is priced in.

Overview

What this covers

GI and corrugated sheets are specified by gauge or thickness, profile and length. As with colour-coated sheets, the sheet count comes from effective cover width rather than overall width.

Applications

Typical uses

Roofing on sheds, stores and outbuildings
Temporary and site structures
Boundary and enclosure cladding
Re-roofing where a plain finish is acceptable

Specification

What identifies the material

These are the details a quotation works from. The more you can give, the fewer questions come back.

Gauge or thickness
Profile or corrugation type
Effective cover width
Length per sheet
Number of sheets, or the roof dimensions
Delivery access

Add it

Add to your material list

Add a roofing line to your material list

Profile and effective cover width are what a sheet count depends on.

Roofing typeProfile, if knownColour or finishThickness, if specifiedSheet lengthEffective cover width, if knownQuantityUnitAccessories requiredFixings and accessory listLongest sheet the site can takeDeliveryDelivery locationUnloading available at siteNeed unloading arrangedRequired on site

Notes

Review material list

Fixing quantities are not calculated from sheet count — enter them yourself or from manufacturer or project data. Effective cover width comes from the profile specification. Availability varies by grade, size, thickness, length, brand, quantity and specification. Current status is confirmed at quotation.

Calculate

Work out the weight or quantity

The calculator prints the formula and the density it used, so the figure can be checked.

Theoretical calculated weight only. Calculator results are preliminary estimates for requirement and quotation preparation. They are derived from published geometry and a stated density, and actual weight varies within manufacturing tolerance. Final material specification and structural quantities must follow drawings, BOQ and engineer or project requirements.

Open the calculator

Price

What affects the price

Material and specification
Quantity
Current market rate
Transport
Unloading
Gauge and profile

We do not publish rates. Current rates are confirmed at quotation because material and transport pricing can change.

Availability

What affects availability

Specification and grade
Quantity required
Current stock or source status
Supplier location
Transport and vehicle availability

Availability varies by grade, size, thickness, length, brand, quantity and specification. Current status is confirmed at quotation. Nothing on this website states stock or a delivery date.

Quotation

What to send with an enquiry

Material and grade or class
Section, diameter, width, height and wall thickness
Length per piece, and whether cut lengths are required
Quantity in the unit you buy
Delivery location and site access
Who unloads at the far end
The date it is needed on site

Avoid

Common mistakes

Counting sheets from overall width rather than cover width
Not accounting for the overlap at the ridge and at the eaves
Ordering without confirming vehicle access for long sheets

Questions

Frequently asked

What gauge should I use?

That follows the span, the purlin spacing and what the roof has to carry, which is a design question. Where a specification or engineer names a gauge, we quote to it.

Is corrugated the same as trapezoidal?

No — they are different profiles with different cover widths and different appearance. State the profile you want, because the sheet count differs between them.