1.Scope adds description of combustible/noncombustible 2.Section 6.1.2 lumber spacing to be consistent with UL790 3.Section 6.1.3 The covering with sheet steel has not been necessary for several years. 4.Section 6.2 - Preparation and Application of the samples in E108 (UL790) is to examine products in such a manner that there is minimum coverage, or a minimum number of layers, over the horizontal deck joints. The lay-out of three-tab shingles most prevalent when the language was developed, with a 1 inch overhang at the leading edge, would result in the horizontal joint occurring directly between two head laps of the shingle. However, when testing certain products available in the marketplace today, with a 1 inch overhang at the leading edge, many of these products would result in maximum coverage over the horizontal deck joints. In order to maintain consistency with the intent of the Standard E108 (UL790), and in accordance with ULs long-standing practice, this proposal clarifies that the roof covering material is to be positioned such that there is minimum coverage, or a minimum number of layers, over the horizontal deck joints. 5.New Section 6.3.3 - To align with testing practices for ASTM D3161, Wind-Resistance of Asphalt Shingles (Fan-Induced Method) and in line with field application, UL was requested to propose that it be permitted to condition self-sealing shingle test decks at a temperature of 135 to 140F (57 to 60C) for a continuous period of 16 hours. This conditioning would be used, if necessary, to assure that shingle test decks are sealed. 6.Section 10.5.1 and 10.5.2 This proposes clarifications on placement of the Class A and Class B brands consistent with existing test practices. Language in 10.5.1 and 10.5.2 has been misunderstood and interpreted as conflicting. This intends to correct this potential confusion.
Keywordsburning brands; classification; flying brand; intermittent flame; rain test; roof coverings; roof deck; spread of flame: Burning brand test; Fire testing--building materials; Flying brand test; Heating tests--building products; Intermittent flame exposure test; Rain; Roofing materials/applications; Weathering (building materials/applications) ;