UL PRODUCT CATEGORY

Roof-covering Materials, TEVT


Guide Information for Roofing Materials and Systems

603.1

GENERAL

This category covers roof-covering materials, which consist of two basic types: (1) roofing systems, generally involving the assembly of several components and may require special equipment to apply the materials involved, and (2) prepared materials, which can be applied directly to a roof deck in accordance with the manufacturer's instructions provided with the product. These coverings are intended for the protection of roof decks from external fire exposure and have not been investigated for performance when exposed to a fire from an internal source, i.e., directed onto the underside of the roof deck assembly.

As indicated in the individual Classifications or Listings, specific materials have been supplementally fire tested in accordance with the requirements of the indicated nationally recognized codes and standards.

The fire-retardant characteristics of treated wood shake and shingle products when exposed to the effects of rain and weather have been investigated in accordance with the basic fire standard used for the category. The effects of exposure to rain and weather have not investigated for the other roof-covering materials under this category.

When indicated in the individual Listings, the wind resistance of prepared roof coverings has been investigated for wind velocities resistance in accordance with ASTM D3161, "Standard Test Method for Wind-Resistance of Asphalt Shingles (Fan-Induced Method)."

Authorities Having Jurisdiction should be consulted as to which class of roof coverings will be acceptable in each location.

CLASSES

Class A includes roof coverings that are effective against severe fire exposure. Under such exposure, roof coverings of this class are not readily flammable and do not carry or communicate fire, afford a fairly high degree of fire protection to the roof deck, do not slip from position, possess no flying brand hazard, and do not require frequent repairs in order to maintain their fire-resisting properties.

Class B includes roof coverings that are effective against moderate fire exposure. Under such exposure, roof coverings of this class are not readily flammable and do not readily carry or communicate fire, afford a moderate degree of fire protection to the roof deck, do not slip from position, and possess no flying brand hazard, but may require infrequent repairs in order to maintain their fire-resisting properties.

Class C includes roof coverings that are effective against light fire exposure. Under such exposure, roof coverings of this class are not readily flammable and do not readily carry or communicate fire, afford some degree of fire protection to the roof deck, do not slip from position, possess no flying brand hazard, and may require occasional repairs or renewals in order to maintain their fire-resisting properties.

Roofing systems provide Class A, B or C coverings over combustible and/or noncombustible (steel, concrete or poured gypsum) decks. Prepared roof-covering materials provide Class A, B or C coverings over combustible decks. Combustible decks consist of the following types:

(A) Minimum 3/4 in. thick sheathing boards.
(B) Minimum 3/8 in. (for Prepared) or 15/32 in. (for Roofing Systems) thick plywood.
(C) Minimum 5/16 in. thick plywood with all joints blocked with solid lumber.
(D) Minimum 3/8 in. (for Prepared) or 7/16 in. (for Roofing Systems) thick non-veneer APA-rated sheathing (oriented strandboard panels, structural particleboard panels, composite panels or waferboard panels).

RELATED PRODUCTS

Roofing systems are composed of materials shown under the various generic system types described in Roofing Systems (TGFU) or in Roofing Systems, Uplift Resistance (TGIK), and assembled as indicated to provide Class A, B or C fire-resistant coverings or uplift-resistant coverings, respectively.

Prepared roof coverings shown in Prepared Roof-covering Materials (TFWZ) and applied in accordance with detailed instructions included in the packages of materials provide Class A, B or C fire-resistant coverings and wind-resistant coverings as indicated in the Listing Mark applied to each package.

Prepared roof-covering materials investigated for impact resistance are covered under Roof-covering Materials, Impact Resistance (TGAM).

Products intended for use as an accessory for a prepared roof-covering system are covered under Prepared Roofing Accessories (TGDY).

For roof deck assemblies investigated for performance under internal fire exposures, see Roof Deck Constructions (TGKX).

Ridge vents (see TGEW) installed in accordance with the detailed instructions included with the product provide Class A, B or C fire resistance as indicated in the Classification Mark applied to each product.

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Last Updated on 2008-01-11
TEVT.GuideInfo TEVT Active 20080111 20080114

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