ASTM Int'l Roofing, Waterproofing Standard to Address 'Seal Around' Capability - ASTM D 7349
October 3, 2008 // Published as a news service by IHS
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ASTM International issued ASTM D 7349 - Test Method for Determining the Capability of Roofing and Waterproofing Materials to Seal Around Fasteners.
When fasteners penetrate roofing or waterproofing products as a planned part of installation, it is expected in some cases that the product will resist water migration at the point of penetration, according to ASTM International.
ASTM D 7349 was designed to address this situation.
Aaron Phillips, technical systems specialist, TAMKO Building Products Inc., said that until the approval of ASTM D 7349, the only standard that measured this type of water migration resistance was ASTM D 1970 - Specification for Self-Adhering Polymer Modified Bituminous Sheet Materials Used as Steep Roofing Underlayment for Ice Dam Protection.
ASTM D 7349 was developed by Subcommittee D08.02 on Prepared Roofings, Shingles and Siding Materials, under the jurisdiction of ASTM International Committee D08 on Roofing and Waterproofing.
"That method is specifically directed toward one class of materials," said Phillips. "The test parameters used for ice dam membranes may not be appropriate for other product types."
ASTM D 7349 provides a more broadly applicable test method for these situations, according to Phillips.
"Unlike [ASTM] D 1970, which is intended to evaluate a single end use, [ASTM] D 7349 is adaptable for evaluation of a variety of asphalt-based products and end uses," said Phillips. "This flexibility is present in the form of protocols that establish test parameters associated with a specific end use."
Phillips also said that new protocols can be added to the test method as user needs arise.
Source: ASTM International.