Flashing Roll Forming Materials: Steel, Aluminum & Trim Coil Guide

Flashing Roll Forming Materials

1. Overview of Flashing Materials in Roll Forming

Flashing roll forming materials are used to produce roofing trims, edge flashings, drip edges, ridge caps, valleys, and architectural trims.

These materials are critical for:

Weatherproofing buildings
Protecting joints and edges
Improving appearance and finish

Flashing materials must combine:

High formability
Surface durability
Corrosion resistance
Consistent color matching with roofing panels

2. Main Types of Flashing Materials

1. Pre-Painted Steel (PPGI)

Most commonly used
Matches roofing panels
Cost-effective

2. Galvanized Steel (GI)

Strong and corrosion resistant
Used in industrial flashing

3. Galvalume / Aluzinc Steel

Superior corrosion resistance
Long lifespan

4. Aluminum

Lightweight and easy to form
Highly corrosion resistant

5. Painted Aluminum

High-end finish
Used in architectural applications

6. Copper

Premium flashing material
Extremely durable

7. Zinc

Used in architectural roofing systems
Natural patina protection

3. Material Composition & Structure

Steel-Based Flashing

Steel core
Zinc or Al-Zn coating
Primer layer
Top paint coating

Aluminum Flashing

Aluminum base
Optional paint coating

Copper / Zinc

Solid materials with natural protective surface

4. Available Coil Specifications

Thickness Range

0.3mm – 1.2mm

Coil Width

200mm – 1250mm (trim coils often slit)

Coil Weight

1 ton – 10 tons

Coil ID / OD

ID: 508mm / 610mm
OD: up to 1500mm

5. Mechanical Properties

Typical values:

Yield Strength: 150 – 400 MPa
Tensile Strength: 250 – 550 MPa
Elongation: 15% – 30%

👉 Must allow tight bends without cracking

6. Coating Types for Flashing Materials

Paint Systems

PE (Polyester)
SMP (Silicone Modified Polyester)
PVDF (premium architectural coating)

Metallic Coatings

Zinc (Z100–Z275)
Aluzinc (AZ50–AZ150)

Coating Thickness

15–35 microns typical

7. Surface Finishes

Gloss finish
Matte finish
Textured finish
Smooth finish
Color-matched roofing finish

8. Common Flashing Profiles Produced

Ridge caps
Valley flashing
Drip edge
Gable trim
Corner flashing
Fascia flashing
Apron flashing
J trim / J channel

9. Advantages of Flashing Materials

Excellent corrosion resistance
Good formability
Wide color options
Compatible with roofing systems
Lightweight and easy to handle

10. Disadvantages / Limitations

Paint can crack on tight bends
Surface scratching risk
Thin material can deform easily
Requires careful handling
Premium materials are expensive

11. Roll Forming Machine Considerations

Roll Tooling

Smooth rollers required
Chrome-coated tooling recommended

Speed

10–30 m/min

Lubrication

Usually not required for coated materials

Cutting

Hydraulic or flying shear

Common Issues

Paint cracking
Surface scratching
Edge wave

12. Common Problems in Production

Paint damage during forming
Edge cracking on bends
Oil canning
Uneven forming
Coil camber

13. Pricing Guide

Typical global pricing:

PPGI Steel: $900–$1400/ton
GI Steel: $700–$1100/ton
Aluzinc Steel: $900–$1300/ton
Aluminum: $2000–$3500/ton
Painted Aluminum: $2500–$4000/ton
Copper: $8000–$12000/ton
Zinc: $4000–$7000/ton

Factors affecting price:

Coating type
Thickness
Color system
Material origin

14. Comparison of Flashing Materials

PPGI vs Aluminum

PPGI = cheaper, stronger
Aluminum = better corrosion resistance

GI vs Aluzinc

GI = standard
Aluzinc = longer lifespan

PVDF vs PE Coating

PVDF = premium durability
PE = cost-effective

15. Best Industries Using Flashing Materials

Residential roofing
Commercial construction
Industrial buildings
Architectural projects
Prefabricated structures

16. How to Choose Flashing Material

Choose Based On:

Roofing system compatibility
Climate conditions
Budget
Required lifespan
Aesthetic requirements

General Guide:

Standard roofing → PPGI
Industrial → GI / Aluzinc
High-end → Aluminum / Copper / Zinc

17. FAQ Section

What is flashing material?

Material used to seal and protect roof joints.

What thickness is used?

Typically 0.3mm–1.2mm.

What coating is best?

PVDF for premium durability.

Can flashing be roll formed?

Yes, all flashing profiles are roll formed.

Does paint crack during forming?

It can if bends are too tight.

18. Machine Matcher Section

We supply roll forming machines for all flashing materials.

Trim and flashing roll forming machines
Multi-profile systems
Custom-built solutions
Global delivery available
UK and USA technical support

Contact:
Machine Matcher
Sales & Technical Team

Quick Specs

Thickness
0.3–1.2mm

Yield Strength
150–400 MPa

Coil Width
200–1250mm

Coil ID
508 / 610mm