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April 16, 2021

Fire Rated Roofing System—Customer Education

Fire rated roofing system—they’re are sought after by countless consumers for obvious reasons. Every location in the world experiences its own extreme weather conditions—one of them being wildfires. This unfortunate natural disaster sweeps across the western states obliterating hundreds of homes, businesses, and cities with no mercy. Just in six months of the year 2020, wildfires destroyed 13,887 buildings. Finding the best fireproof materials to incorporate on a home is crucial to maintain precautionary safety. States across the Midwest statistically don’t experience wildfires—but it’s not impossible. Incorporating a fire rated roofing system on your home provides incredible protection for years to come. Continue reading to learn more about the fire-resistant qualities a metal roof has to offer. First, let us explain the flame spread scale.

What is a “Class A” Fire Rated Roofing System?

Metal roofing systems are energy-efficient, durable, long-lasting, low maintenance, and best of all for these circumstances—fire-resistant. We talk about steel roofing systems being rated Class A, but what exactly does this mean for homeowners? The flame spread scale that we rate metal roofing on has three classifications. The ratings on the sale areClass A, Class B, and Class C—Class A being the best rating of the three. Adding a Class Arated roofing system to your home is a proactive choice.Class A rated roofing systemsare the best roofing materials to aid in fireproofing your home. Next, we’ll explain the specifics regarding the testing process.

How a “Class A” Fire Rated Roofing System is Determined

Determining how a product is rated is based upon a series of controlled scientific testing. These tests make it possible to determine how well certain products stand up against possible combustion. Through testing, scientists determine the flame spread index and smoke developed index. Flame spread index can be referred to as FSI, and smoke developed index can be referred to as SDI. FSI measures the rate at which the flames spread across a surface. SMI measures the rate of smoke production. All testing procedures are performed at the American Society for Testing Materials (ASTM). The exact test for classifying the fire ratings for each material is called the E-84 test (or tunnel test). The sample material is closely monitored as special software is used to determine the specific SMI and FSI measurements of the material. This is the process in which scientists categorize the fire ratings for individual building materials.

Fire Rated Roofing System vs. Fire Rated Roofing Products

Steel roofing panels are widely known as a Class A fire rated roofing products. Many customers seek out metal roofing for this purpose alone—especially those who locally experience the wildfire season. Although a Class A rated roofing product is wonderful—that doesn’t necessarily mean the entire roofing system is rated Class A. This is where customer education comes into play. You can have either a singular productor an entire roofing system rated Class A. The roofing system includes the decking, underlayment, trim, and panels. The roofing system as a whole will be more susceptible to combustion if all the materials are not Class A rated. This may notconcern everyone, but those worried should aim towards installing a completely Class A rated system.

Questions:

Many homeowners want a roof that is as fire-resistant as possible. Some of the most common fire rated Class A roofing materials are steel roofs, clay roof tiles, and concrete roofs.
Just because you have a Class A fire rated product—such as steel roofing panels—doesn’t, infact, conclude you have a Class A fire rated roofing system as a whole. The roof decking, underlayment, and metal panels all need to be concluded as Class A fire rated in order to determine your entire roofing system is considered Class A fire rated.
Wagner Metal Supply’s steel roofing panels are durable, long-lasting, low-maintenance, energy-efficient, and Class A fire rated.
The American Society for Testing Materials (ASTM) is responsible for testing materials to determine where they fall on the fire rating scale. The exact test for classifying the fire ratings for each material is called the E-84 test (or tunnel test).Through testing, scientists determine the flame spread index and smoke developed index. Flame spread index can be referred to as FSI, and smoke developed index can be referred to as SDI. FSI measures the rate at which the flames spread across a surface. SMI measures the rate of smoke production. The software uses the collected data to classify where the material falls on the fire rating scale—Class A, Class B, or Class C.