What Is Edge Metal Flashing in Commercial Roofing?

When it comes to commercial roofing, every component has a purpose—and edge metal flashing plays a crucial one. If you’re a property owner or facility manager in Gainesville, GA, or nearby cities like Buford, Cumming, or Dawsonville, understanding this detail could help you protect your investment for years to come.

What Is Edge Metal Flashing?

Edge metal flashing is the strip of metal installed along the perimeter of a commercial roof. It's where your roofing membrane terminates—especially on flat or low-slope roofs. Its job? To:

• Direct water away from the edge

• Secure the membrane in place

• Protect vulnerable edges from wind uplift

• Prevent water intrusion into the building envelope

It’s sometimes called gravel stop or coping, depending on where it’s installed and how the roofing system is designed.

Why It Matters for Commercial Roofs

In Gainesville and the surrounding North Georgia region, we get our fair share of wind-driven rain, hail, and heavy downpours. When the roof edge isn’t properly sealed, that water can get underneath the roofing system—leading to leaks, insulation damage, and mold growth. Edge flashing helps prevent that.

Here’s how it works:

• Water Diversion: It helps shed water into the gutter or down the façade without it seeping under the membrane.

• Wind Uplift Resistance: It reinforces the roof edge, preventing the roofing material from peeling up during strong winds (especially important in storms).

• Aesthetics & Longevity: It gives the roof a clean, finished look while protecting exposed edges from UV rays and thermal expansion damage.

Materials & Standards That Matter

At L&L Roofing, we typically use aluminum, galvanized steel, or coated steel edge flashing, depending on the project needs. All our edge metal systems follow ANSI/SPRI ES-1 standards for edge securement, which is required by the International Building Code for wind uplift resistance.

We always recommend specifying:

• Minimum gauge for metal strength (typically 24-gauge steel or thicker)

• Kick-out drip edge design to avoid staining and water curling back on the façade

• Compatible fasteners and cleats for secure installation

• Protective coatings or finishes to match your roofing system

Common Problems Caused by Poor Edge Flashing

Too often, we’re called in to fix commercial roofs where the edge flashing was improperly installed—or skipped altogether. This leads to:

• Membrane blow-offs in high winds

• Rusted or loose metal sections

• Stained walls from water runoff

• Persistent leaks at the roof edge

If you’re seeing staining, bubbling membrane edges, or loose metal strips—don’t ignore it. A small fix now can prevent a major repair later.

FAQs About Edge Metal Flashing

How often should edge flashing be inspected?

At least once a year or after any severe storm. Look for loose fasteners, gaps, rust, or signs of separation from the membrane.

Is edge metal flashing required by code?

Yes. Most commercial roofing systems must comply with IBC and ANSI/SPRI ES-1 standards, which include edge securement requirements.

Can edge flashing be replaced without replacing the whole roof?

In many cases, yes. If the roof membrane is still in good shape, we can often install new edge metal as a standalone repair.

Protect Your Commercial Roof with L&L Roofing

Edge metal flashing might not get much attention, but it's a frontline defender for your roof. At L&L Roofing & Construction, we install commercial roof systems with the craftsmanship, integrity, and code-compliance your building deserves. Whether it's a new TPO roof in Flowery Branch or metal edge repairs on a warehouse in Dahlonega—we do it right the first time.

Need an inspection? We’ll give you an honest assessment and walk you through your options.