What is Metal Roofing?

For commercial buildings, metal roofing is one of the most popular commercial roof choices available today.

And when installed properly – a metal roof can offer decades of long-term performance.

In fact.

Some metal roofing systems can last 100 years or longer.

So what is a metal roof?

A metal roofing system consists of overlapping metal roofing panels or shingles that are fastened to open framing or a solid substrate.

While some metal roofs use metal roof shingles…

In this guide, we will focus on the most common styles of modern commercial metal roofing systems. 

First, let’s take a look at standing seam metal roofs.

Below is a building with a standing seam metal roof system.

What is a Standing Seam Metal Roof?

A standing seam metal roofing system is commonly referred to as a “concealed fastener” roofing system.

Where the panel seams are fastened to a solid roof deck or open framing using concealed clips or flanges.

Some standing seam metal roofs utilize a seam cap while others (mechanically seamed panels) utilize an in-field mechanical seamer to create a “double-lock” seam.

A standing seam metal roof has the following unique design characteristics:

1. Each standing seam panel includes (on the long sides) a vertical “leg” that joins its adjacent panel to form the “standing seam”
2. The seam stands above the flat surface of the panel to prevent water entry
3. Panel fasteners are concealed for a cleaner look
4. Roof panels are not penetrated by external fasteners

Standing seam roof panels are available in a wide variety of designs options.

Designs vary in terms of how seams connect, how the panel is mounted, and the finished look.

Some standing seam panels include a wide flat surface, while others include striations or ribs in between seams.

Here are some examples of various standing seam metal roof panels ›