Fire ratings for roofs are classified as either class a class b class c or are unrated if a roof covering cannot meet the requirements for any of these classifications.
Beetlekill siding class c fire rating.
Class a is the highest rating offering the highest resistance to fire and unrated is the worst.
Fiber cement can withstand high heat from fires.
Non classified roof systems have no fire rating.
Hourly fire resistance ratings hourly ratings are a function of the assembly being used.
Steel siding not only offers protection against a fire it is also naturally resistant and does not require the use of fire resistant treatments.
The highest rating possible for fire resistance.
Lp smartside is a class c iii rated product when tested according to astm e84.
In this case the class a highest degree of fire resistance b or c rating provides relative information about the ability of the roof covering and assembly to resist the penetration of fire as a result of a standard fire exposure astm e 108.
Rollex navigator steel siding for example has a class a fire rating.
The tests used to determine the fire ratings for roofs also provide fire resistance information.
Note that a class c roof system is considered fire resistant while a class c or iii building material as above is not.
The astm d 2898 standard rain test the highest fire classification is class a.
An alternative to vinyl siding fiber cement a mixture of cement sand and wood fibers manages to achieve very high fire resistance without sacrificing convenience and durability many fiber cement products carry a class a fire rating meaning that they can withstand several hours of heat before melting down.