What Coil Width Do I Need for Deep Corrugated Roofing? Full Guide

What Coil Width Do I Need for Deep Corrugated Roofing? (Full Coil Size Guide)

Short Answer

Deep corrugated roofing sheets typically require a coil width between 950 mm and 1100 mm, depending on the cover width and the depth of the corrugation.

Because deep corrugated profiles have larger wave heights and wider geometry than standard corrugated sheets, they require significantly more material, resulting in increased coil width.

Why Coil Width Matters in Deep Corrugated Roll Forming

Coil width is especially critical for deep corrugated sheets due to the increased profile depth and material movement during forming.

If the coil width is incorrect, the profile will not form correctly and production issues will occur.

If the coil is too narrow:

• Corrugations will not fully form
• Profile depth will be reduced
• Sheet width will be incorrect
• Structural strength will be compromised

If the coil is too wide:

• Excess material waste
• Increased production costs
• Feeding instability
• Alignment issues

Coil width directly affects:

• Wave consistency
• Roll forming accuracy
• Material flow
• Structural performance

Correct coil width ensures reliable forming and strong final panels.

Profile Dimensions & Coil Width Overview

Deep Corrugated Dimensions (Left Side Concept)

Typical cover width: 762–914 mm
Overall width: approximately 800–1000 mm
Corrugation height: 25–50 mm
Pitch (wave spacing): typically 75–150 mm
Profile type: deep sinusoidal wave

Coil Width & Development (Right Side Concept)

Typical coil width: 950–1100 mm
Flat development width: approximately 950–1100 mm
Includes: deep wave formation
Allowance factors: depth, pitch, and thickness
Variation: depends on profile design

Understanding Coil Width vs Cover Width

A common mistake is assuming coil width equals finished width.

This is incorrect.

Cover width is the usable width after installation.

Coil width is the flat sheet before forming.

For deep corrugated sheets, the coil must include:

• Large wave formation
• Continuous bending
• Material stretch
• Edge overlap

Because of deeper waves, these profiles require significantly more material than standard corrugated sheets.

Estimated Development (Flat Blank Width)

The coil width is based on the developed flat width of the profile.

This includes:

• Deep wave geometry
• Pitch spacing
• Continuous bending
• Material stretch

Basic concept:

Flat width = cover width + wave development + overlap + bend allowance

Example for deep corrugated:

Cover width: approximately 850 mm
Wave development: approximately 120–180 mm
Overlap: approximately 20–40 mm
Bend allowance: approximately 10–30 mm

This results in a coil width of approximately 950–1100 mm.

Why Deep Corrugated Requires More Coil Width

Deep corrugated profiles are designed for strength and span capability.

They require more material because:

• Waves are deeper
• Geometry is larger
• More material is used in forming
• Structural requirements are higher

This makes deep corrugated sheets:

• Stronger than standard corrugated
• Suitable for wider spans
• Ideal for industrial applications

Typical Coil Width Range

Standard deep corrugated: 950–1100 mm

Light gauge deep corrugated: 920–1000 mm

Heavy gauge deep corrugated: 1000–1150 mm

Exact values depend on profile design and machine setup.

Common Material Thicknesses

Typical thickness range:

0.30 mm – light-duty roofing
0.40 mm – standard use
0.50 mm – commercial use
0.60 mm – industrial use
0.70 mm+ – heavy-duty applications

Thicker materials:

• Require more forming force
• Increase bend allowance
• Increase required coil width slightly

Materials Used for Deep Corrugated Roofing

Common materials include:

PPGI (pre-painted galvanized steel)
Galvanized steel (GI)
Galvalume (Aluzinc)
Aluminum

Material properties affect:

• Flexibility
• Springback
• Forming accuracy

These can influence coil width requirements.

Industries Using Deep Corrugated Roofing

Deep corrugated sheets are widely used in heavy-duty and large-span applications.

Common industries include:

Industrial buildings
Warehouses
Agricultural structures
Mining facilities
Infrastructure projects

They are popular because they offer:

• High strength
• Increased span capability
• Good drainage performance
• Durability

Key Factors That Affect Coil Width

Profile geometry
Deeper waves significantly increase material usage

Material thickness
Thicker material increases bend allowance

Overlap design
Overlap adds to total width

Tooling design
Different machines produce slight variations

Machine setup
Entry guides and forming alignment affect feeding width

Common Mistakes When Selecting Coil Width

Using standard corrugated coil width for deep corrugated
Deep profiles require significantly more material

Guessing coil width
Always calculate using development

Ignoring wave depth
Depth is a major factor in material usage

Not matching machine tooling
Each machine may require specific coil width

Important Engineering Note

The exact coil width for deep corrugated roofing cannot be confirmed without a profile drawing.

Small changes in:

• Wave depth
• Pitch
• Material thickness

can significantly affect the required coil width.

Always confirm using engineering calculations or supplier input.

How to Confirm the Correct Coil Width

To determine accurate coil width, you need:

Profile drawing (DXF or PDF)
Material type
Material thickness
Required cover width
Machine specifications

This ensures:

• Accurate production
• Reduced waste
• Correct machine setup

FAQ – Deep Corrugated Coil Width

What happens if the coil width is too narrow?
The deep corrugation will not form correctly and strength will be reduced.

Why does deep corrugated require more coil width?
Because of increased wave depth and material usage.

Does thickness affect coil width?
Yes, thicker material increases bend allowance.

Can all deep corrugated sheets use the same coil width?
No, design variations will change requirements.

Need Help Confirming Your Coil Width?

Incorrect coil width can lead to production issues, waste, and increased costs.

Machine Matcher can help you:

Review your profile drawing
Calculate exact coil width and development
Match the correct roll forming machine
Advise on materials and setup

Contact our team to ensure your production is accurate and efficient from the start.