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EIFS: The Next Generation
[ Page 4 of 6 ]

Advertising supplement provided by Sto Corp.

Table 1: EIFS—The Next Generation Performance Specifications

Table 1A—Air/Moisture Barrier Performance
Test Method Criteria
1. Water Penetration Resistance AATCC 127 (Water Column) Resist 21.6 in (55cm) water for 5 hours before and after aging
2. Water Penetration Testing ASTM E 1233/ASTM E 331 No water at exterior plane of sheathing. (exterior gypsum. Dens-Glass Gold, plywood, OSB) after 10 cycles @ 80% design load and 75 minutes water spray at 6.24 psf (299 Pa) differential
3. Water Resistance Testing ASTM D 2247 Absence of deleterious effects after 14 days exposure
4. Water Vapor Transmission ASTM E 96 Method B (Water Method) Measure
5. Air Leakage ASTM E 283 <0.06 cfm/ft2 (0.305 L/s•m2)
6. Structural Integrity ASTM E 330 2 inches (51 mm) water pressure (positive & negative) for 1 hour.
7. Dry Tensile Strength ASTM D 882 20 lbs/in (3503 N/m) minimum before and after aging
8. Pliability ASTM D 522 No cracking or delamination using 1/8" (3 mm) mandrel at 14ºF (-10ºC) before and after aging
9. Surface Burning ASTM E 84 Flame Spread: <25 Smoke Developed: <450
10 Tensile Adhesion ASTM C 297 >15 psi (103 kPa)

Table 1B—EIFS Weather Resistance and Durability Performance
Test Method Criteria
1. Accelerated Weathering ASTM G-23 No deleterious effects at 2000 hours when viewed under 5x magnification
  ASTM G-53 No deleterious effects at 2000 hours when viewed under 5x magnification
2. Freeze/Thaw Resistance EIMA 101.01 (Modified ASTM C-67) No deleterious effects at 60 cycles
3. Water Penetration EIMA 101.02 (Modified ASTM E-331) No water penetration beyond the plane of the base coat/EPS board interface after 15 minutes at 6.24 psf (299 Pa) or 20% of design wind pressure, whichever is greater
4. Drainage Efficiency EIMA 200.02 90% minimum
5. Tensile Adhesion EIMA 101.03 (Modified ASTM C-297) No failure in the adhesive, base coat, or finish coat. Minimum 5 psi (34 kPa) tensile strength before/after accelerated weathering and freeze/thaw exposure
6. Water Resistance ASTM D-2247 No deleterious effects* at 14 day exposure
7. Salt Spray ASTM B-117 No deleterious effects* at 300 hours
8. Abrasion Resitance ASTM D-968 No cracking or loss of film integrity at 528 quarts (500 L) of sand
9. Mildew Resistance ASTM D-3273 No growth supported during 28 day exposure period
*No deleterious effects: no cracking, checking, crazing, erosion, rusting, blistering, peeling or delamination

[ Page 4 of 6 ]

 

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