Laboratory Report H

Transcription

1 Air Permeance Testing of in accordance with ASTM E2178 Prepared for: 6797 Thoreau Lane Baltimore, OH Date of Issuance: January 16, 2013

2 Page 2 of 5 CLIENT INFORMATION: TRINITY ERD PROJECT: 6797 Thoreau Lane Baltimore, OH Attn.: Kevin Monday 2012.H43980SC SAMPLES: Product Published Description SAMPLE DELIVERY: TEST DATE(S): 01/04/ /08/2013 M-D NOTIFICATION: TECHNICIANS: PROPERTIES: STANDARDS: Perforated woven polyolefin weather resistive barrier Third party sampling was conducted by Granville B. Vickerman & Associates on 12/18/2012 and shipped by the named client from Endurapak Inc. in Sudbury, Ontario, Canada. The samples were received at Trinity ERD s South Carolina facility on 12/28/2012. None Charles Phillips, Tim Cook Air Permeance ASTM E2178 Standard Test Method for Air Permeance of Building Materials, 2003, ASTM. AC 38 Acceptance Criteria for Water-Resistive Barriers, 2011, ICC. EQUIPMENT: Air Permeance: ERD Air Permeance apparatus, CME Laminar Flow elements 1. AIR PERMEANCE: 1.1 Specimen Preparation: (ASTM E2178) Five specimens are tested. A 4 x 4 ft (1.2 x 1.2 m) specimen is conditioned in 21 o C (68.8 o F) and 40% relative humidity for a minimum of seven days. The specimen thicknesses are given in Table 1A The specimen is placed in the test apparatus, with gaskets used to create air-tight seals. A polyethylene film is placed over the test specimen and secured with gaskets. 1.2 Procedure: A pressure differential is created across the specimen assembly with a vacuum motor. The pressure difference is increased and the air flow rate recorded The top section of the polyethylene film is cut, and the testing repeated The flow rate equation is established through linear fitting of data by method of least squares for the mean air flow. The coefficient of determination (r 2 ) is calculated, and a regression line based on mean air leakage data is reported. TABLE 1A: SPECIMEN THICKNESS, HOMEGUARD HOUSEWRAP Test Data (in.) Material Average St. Dev

3 Page 3 of Results: TABLE 1B: AIR PERMEANCE, HOMEGUARD HOUSEWRAP Material HomeGuard Housewrap Pressure Measured Air Flow (L/s m²) Average Pa (psf) L/s m² cfm/ft² AC 38 /Fail 25 (0.52) (1.04) Air Permeance 75 (1.57) at 75 Pa: 100 (2.09) < (3.13) (L/s m²) 300 (6.27) or Average: < (cfm/ft²) Air 75 Pa: FIGURE 1A. AIR LEAKAGE, HOMEGUARD HOUSEWRAP Measured air flow (L/S-m 2 ) Specimen 1 Specimen 2 Specimen 3 Specimen 4 Specimen 5 Reference pressure at 75 Pa P (Pa)

4 Page 4 of 5 FIGURE 1B. REGRESSION LINE, HOMEGUARD HOUSEWRAP Measured air flow (L/S-m 2 ) air leakage rate at 75 Pa y = 3E-06x + 2E-05 R² = P (Pa) Compliance with ASTM E2178, Section was evaluated, whereby re-measurement of air leakage at 100, 75, and 50 Pa must be within 10% of the original measurements. TABLE 1C: TESTING EFFECT UPON AIR LEAKAGE MEASUREMENT Material P (Pa) % difference E2178 /Fail <10% See Section Review of data in Table 1C show movements measured to the nearest L/s m 2. Since the amount of air movement is nearly zero, the difference between the extremely low flow rates is magnified as an artifact, and is not significant. 1.4 Error Analysis: Reporting the 95% confidence interval is required for each test as outlined in ASTM E2178 Appendix A1. These intervals are omitted as they could not be calculated due to undefined values of natural log.

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