What class are composition shingles?

Common Class A roof coverings include asphalt fiberglass composition shingles, concrete and flat/barrel-shaped tiles. Some materials have a “by assembly” Class A fire rating which means, additional materials must be used between the roof covering and sheathing to attain that rating.

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.

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.

What is a Class A roof 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.

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 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.

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.

What is the difference between a Class 3 and Class 4 shingle?

Class 3 shingles can withstand ice balls that are 44 mm or 1.75 inches in diameter. Class 4 shingles can withstand ice balls that are 50.8 mm or 2 inches in diameter.

What is a Class B roof covering?

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.

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.

Are shingles Class A?

Common Class A roof coverings include asphalt fiberglass composition shingles, concrete and flat/barrel-shaped tiles. Some materials have a “by assembly” Class A fire rating which means, additional materials must be used between the roof covering and sheathing to attain that rating.

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.

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.

What is the difference between composition and asphalt shingles?

Yes, composition shingles and asphalt shingles are the same thing. It's simply just another term the roofing industry uses for asphalt shingles. The term “composition” comes from the fact that asphalt shingles are a composite of man-made materials.

How many classes of shingles are there?

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.

How many grades of shingles are there?

In general, there are three grades of asphalt shingles to choose from, ranging from good to better to best. At the lower tier, you have “3-tab” shingles, which are simply shingles comprised of three tabs.

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.

What is B roof t4?

B Roof(t4) is the highest rating, whilst F Roof(t4) is the lowest. The BS EN 13501-5 refers to four separate roof tests. These tests measure the performance of a roof's resistance to external fire exposure from penetration through the roof construction and spread of flame over the roof's surface.

Are composition shingles fire-resistant?

Class A is the most fire-resistant and should be the choice of anyone living in wildfire-prone areas. Common Class A roof coverings include asphalt fiberglass composition shingles and concrete or clay tiles.

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.

Should I get Class 4 shingles?

Overall, Class 4 rated shingles are superior to typical asphalt shingle roofing products. It can be well worth it to know that your roof will provide extended protection and long-term cost savings.

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.

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.

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.

Is CertainTeed landmark a Class 4 shingle?

Product Description. Landmark Impact Resistant (IR) shingles reflect the same high manufacturing standards and superior protection as the rest of CertainTeed's line of roofing products, and they meet UL 2218 Class 4 Impact Resistance at time of manufacture.