Metal Roofs

Metal roofs are durable, but they still need protection where weather and age start to wear down the system. Fasteners, seams, flashings, and corrosion-prone areas should be addressed before leaks interrupt the building below.

National Coatings Of Canada Inc helps restore metal roofs with a fluid-applied Re-Ply™ process designed to suit the existing roof condition. Our team follows a step-by-step approach that includes preparation, rust control, detail reinforcement, and reflective finish layers.

Call (519) 323-4597 to find out whether your metal roof is a candidate for restoration.

Schedule a Metal Roof Consultation

What Is the ASTEC® Re-Ply™ Roofing System for Metal Roofs?

The ASTEC® Re-Ply™ Roofing System is a fluid-applied restoration system for eligible metal roofs. It’s designed to address surface preparation and finish coats so the existing roof can be restored with a seamless, reflective, weathertight membrane.

A typical Re-Ply™ metal roof process includes the following six stages:

1. Prepare Surface Tighten or replace loose fasteners. Remove scaling rust and pressure wash to achieve a clean, sound roof surface.

2. Encapsulate Corrosion as Needed Apply ASTEC B-16-71 Rust Control specially formulated to neutralize and halt further metal roof corrosion.

3. Seal Fasteners Tighten or replace any loose fasteners. Encapsulate every fastener with ASTEC WPM #9 fluid membrane to insure a watertight seal.

4. Seal Seams & Flashings Reinforce all seams, flashings, and penetrations with high tensile strength fabric saturated with ASTEC WPM #9 fluid membrane, or use WPM #10 fiber-reinforced fluid membrane.

5. Apply First Layer Apply the first layer of either ASTEC #900 Ceramic Finish, or ASTEC #2000 Finish for a tough, weatherproof membrane.

6. Apply Final Layer Apply the second application of either ASTEC #900 or ASTEC #2000 Re-Ply finish to the roof. This results in a seamless, highly reflective "cool roof" that remains durable, weathertight, and pliable. Impervious to many airborne corrosives, ASTEC roofs have proven performance over 100's of millions of square feet.

This is a typical system for metal roofs. Products and procedures may vary by roof type and condition. Only ASTEC detailed specifications will be approved on any ASTEC roofing project.

What Makes a Seamless Coating System Useful for Metal Roofs?

Metal roof leaks often begin where panels are joined, fastened, or interrupted by rooftop components. Seams and penetrations create areas where movement and weather exposure can open small water entry points.

A seamless coating system helps cover the prepared roof surface with continuous protection. When fasteners, seams, and penetrations are treated first, the finished membrane helps reduce the weak points that allow water into the building.

Why Does Fastener Sealing Matter on Metal Roofs?

Fasteners are one of the most common failure points on aging metal roofs. Over time, screws can loosen, washers can wear, and small gaps can form around the fastener head that weaken the roof’s weathertight protection.

Sealing each fastener helps restore protection at these repeated attachment points across the roof. With ASTEC WPM #9 fluid membrane, fasteners can be encapsulated to help create a watertight seal before the finish coats are applied.

How Does ASTEC B-16-71 Rust Control Work?

Rust can spread when exposed metal continues reacting with moisture and air. If corrosion is left untreated before coating, it can weaken the surface and interfere with the long-term performance of the roof restoration system.

ASTEC B-16-71 Rust Control is applied where corrosion needs to be addressed before the roof is fully coated. It’s formulated to neutralize rust and help halt further corrosion so the roof surface is better prepared for the next stages of the Re-Ply™ system.

How Are Metal Roof Seams Reinforced Before Coating?

Seams, flashings, and penetrations need added attention because they handle drainage exposure and transitions between materials. These areas are more likely to develop leaks than the open metal panel field.

Reinforcement helps strengthen those vulnerable points before the finish layers are applied. Depending on the roof condition and specification, high-tensile fabric saturated with ASTEC WPM #9 or WPM #10 fiber-reinforced fluid membrane may be used.

Areas commonly reinforced include:

Panel seams: These joints can move over time and need added waterproofing support
Flashings: These transitions help protect edges, curbs, and roof changes
Penetrations: Pipes, vents, and equipment openings need careful sealing
Fastener rows: Repeated attachment points can create leak risks if left exposed
Roof transitions: Changes in plane or material often need reinforced protection

Review Re-Ply™ Options for Metal Roofs

When you need help with metal roofs, National Coatings Of Canada Inc can assess whether the ASTEC® Re-Ply™ Roofing System is the right fit for your property. Our team restores qualified roof surfaces with a process focused on watertight performance and long-term durability.

Looking for metal roofs? Contact us at (519) 323-4597.