Are asphalt shingles Class C?

Fire Rating Classifications
Pressure-treated shakes and shingles usually fall in this category. Class C – Most contractors wouldn't recommend installing class C roofing, given that these can only provide light fire protection. Untreated wood shakes and shingles as well as plywood are classified here.
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What class rating are asphalt shingles?

Due to the materials used in their construction, most asphalt shingle roof assemblies have a Class A fire resistance rating. Fire resistance is based on two test standards: UL 790 and ASTM E 108.
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What is a Class C shingle?

• Class C roof coverings, which are effective against light fire test exposures. Under such exposures, the roof coverings afford a degree of fire protection to the roof deck, do not slip from position, and are not expected to produce flying brands.
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What is the difference between Class A and Class C roofing?

This standard includes three classes of fire exposure: • Class A roof coverings, which are effective against severe fire test exposures • Class B roof coverings, which are effective against moderate fire test exposures • Class C roof coverings, which are effective against light fire test exposures.
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What is a Class C roof assembly?

Class C roof assemblies are those that are effective against light fire-test exposure. Class C roof assemblies and roof coverings shall be listed and identified as Class C by an approved testing agency.
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Architectural VS 3-Tab Shingle (What's The Difference?)



What is a Class B shingle?

Class B – Class B shingles can withstand moderate surface and a maximum flame spread of eight feet. Pressure-treated shakes and shingles usually fall in this category. Class C – Most contractors wouldn't recommend installing class C roofing, given that these can only provide light fire protection.
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What is a Class A shingle?

Class A is the highest rating, offering the highest resistance to fire, and unrated is the worst. Examples of a Class A roof covering include concrete or clay roof tiles, fiberglass asphalt composition shingles and metal roofs. An example of an unrated covering is an untreated wood shake roof.
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What is a Class 2 shingle?

A class 2 is able to withstand a 1.5-inch diameter object dropped at 14 feet. Class 3 shingles can handle a 1.75-inch object being dropped from 17 feet, and class 4 shingles can take a 2-inch object from 20 feet.
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What is a Class 4 shingle?

To receive a Class 4 rating, a roofing shingle must withstand having a 2-inch steel ball dropped multiple times from a height of 20 feet. For more perspective, if this same test is repeated on a 4-inch concrete paver, the force of the steel ball would crack the paver in half.
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Is TPO a Class C roof covering?

PVC and TPO products are both available with a Class A rating, although TPO is the most common commercial roof. Acrylic and silicone roof coating may have a UL Class A fire rating. However, they are part of a commercial roofing system and that entire system must be considered when determining the roof's fire rating.
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What is a Class 3 shingles?

A Class 3 rating is given to shingles that do not crack after being hit by a steel ball, measuring 1.75” in diameter and dropped from twenty feet. Class 4 is the highest after taking a hit from the same twenty foot height with a two-inch steel ball.
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How many classes of shingles are there?

Different Types of Roof Shingles. There are three major categories of asphalt roofing shingle products available today - strip shingles, dimensional shingles, and luxury shingles. It is important to understand the differences between each type of roofing shingle in order to pick the right product for your home.
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What is a Class B roof?

Class B roof assemblies are those that are effective against moderate fire-test exposure. Class B roof assemblies and roof coverings shall be listed and identified as Class B by an approved testing agency.
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What makes a roof Class A?

Class A materials include flat or barrel-shaped roof tiles, fiberglass asphalt composition shingles, and metal roofs (i.e., steel or copper). Fire-retardant pressure-treated shakes and shingles are the most common Class B roofing material.
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What is a Class 1 roof?

A Class 1 roof has undergone a series of tests that evaluate the entire roof assembly, including the external spread of flame test utilized for the Class A rating. All Class 1 roof assemblies are Class A roofs, but not all Class A roof systems meet the Class 1 rating.
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Do shingles have a fire rating?

Class A Fire Rating – Shingles with the highest fire resistance are classified as Class A. These shingles will be effective against moderate fire exposures, are not readily flammable and will not cause fires to spread. Class B Fire Rating – Shingles that offer moderate fire resistance are classified as Class B.
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How can I tell if my shingles are Class 4?

Shingles are rated Class 1 through 4, with Class 4 shingles having the highest resistance. The impact rating is usually marked on the underside of the shingle or on the packaging. You will not be able to tell the impact rating by looking at a shingle.
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What class is a 30 year shingle?

30 year impact resistant shingles vary in strength from class 1 to class 4. The type of class determines the material and the resistance of the shingle. Generally class 4 is the highest level of protection making the shingle less susceptible to hail damage or damage from other storms or weather debris.
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Are Certainteed landmark shingles Class 3 or 4?

Heat. Our impact resistant shingles are tough. And we've got the evidence to prove it. Each shingle in our line is made from materials that have achieved the highest impact resistance rating—Class 4—during testing performed with steel balls simulating 90-mph hailstones of varying sizes.
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What are the different grades of roofing shingles?

There are three grades of asphalt shingles to choose from, which are 3 tab shingles, architectural shingles, and impact resistant shingles.
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Does GAF have a Class 4 shingle?

Timberline® AS II SBS Modified IR Shingles combine all the beauty of Timberline® Shingles with UL 2218 Class 4 impact resistance. Their beauty is unlike any other, thanks to our proprietary shadow bands. Each shadow band is applied using a sophisticated, computer-controlled “feathering” technique.
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Are Timberline HD shingles Class 4?

Timberline® ArmorShield™ II Impact-Resistant Shingles combine the beauty of Timberline® (North America's #1-selling shingle) with UL 2218 Class 4 Impact Resistance.
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What class is a 25 year shingle?

3-tab shingles generally have warranties of 25 to 30 years. Architectural shingles typically come with warranties of 50 years, and some of them may even have lifetime warranties.
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How do I know what type of shingles I have?

Check the purchase or repair documents for the roof. You may have receipts, warranties, bills of sales, or brochures that identify the brand. If there were any shingles left over when the roof was installed, see if the package provides information.
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What are the classification of roof?

Presently, the most common classification of roofs is of two broad forms. Namely; Flat roofs and Pitched roofs. The construction of flat roofs need to meet three basic functions; insulation, waterproofing and construction.
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