Class A roof assemblies are those that are effective against severe fire test exposure. Class A roof assemblies and roof coverings shall be listed and identified as Class A by an approved testing agency. Class A roof assemblies shall be permitted for use in buildings or structures of all types of construction.
What makes a roof Class A?
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. … A burning ‘Class A’ brand on a fiber cement roof covering during the fire test.
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.
What is a Class C roof?
• 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.
What is a class four roof?
Class four is an impact standard used to rate roofing materials like shingles and metal materials. The hail standard UL 2218 essentially encompasses four different sized metal balls being dropped from different heights (to simulate hail, more or less). …
What is a Class 2 roof?
A Class 2 impact shingle is one that has been assigned a Class 2 rating by Underwriters Laboratory, or UL. … A shingle is assigned a Class 2 rating if it does not rupture or crack when hit by 1.25-inch balls dropped from 20 feet above. The highest rating is Class 4.
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 a Class 3 or 4 roof?
Shingles are granted a rating of Class 1, 2, 3, or 4 based on the degree of impact they can withstand without cracking. The highest rating is Class 4, offered by most major roofing manufacturers. … To achieve Class 3 rating, the shingle must withstand a 1 ¾-inch steel ball dropped from 20 feet.
What is the difference between Class A and Class B fire rating?
Fire Retardant Classifications
Class A fire retardants have a flame spread rating of between zero and 25. These materials are effective against severe fire exposure. Class B fire retardants have a flame spread rating of between 26 and 75. These materials are effective against moderate fire exposure.
What is Class C material?
Class C – Flame-spread 76-200, smoke developed 0-450. NFPA 101 primarily applies this classification to interior wall and ceiling finish materials. Roof coverings must meet a different set of criteria.
What is Class C fires?
Class C. Class C fires involve energized electrical equipment. Extinguishers with a C rating are designed for use with fires involving energized electrical equipment.
What are the classes of shingles?
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.
Do I need Class 4 shingles?
If your roof lacks proper protection against hail and wind storms, you’re bound to experience costly damage. That’s why installing Class 4 shingles is a must, especially if you live in an area with frequent extreme weather.
What is the difference between Timberline HD and HDZ?
The difference with the HDZ from the HD is that it has a 99% nailing accuracy due to its StrikeZone nailing area feature that is 600% larger. It is also gives you a 30% faster nail fastening upon installation than the HD.
What is the best class 4 shingle?
One of the best Class 4 shingles on the market are CeDUR Roofing Shakes synthetic wood shakes. Their product mimics the beauty and uniqueness of real cedar shakes, but is much more durable. CeDUR’s products have earned classification as Class 4 impact resistant shingles.