| Question / Issue |
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| We are using a Dryvit system in Augusta, Ga. I have located attachment paterns with Winlock fasteners in your e-lit, however it only gives details for EPS up to 2". As you will see in the next paragraph, we are using thicker EPS with Hilti fasteners. Please provide a recommended pattern as such.
The design wind speed at this building is 100 mph. The worst case wall component and cladding wind pressure (10 ft2 area) is 25 psf.
The assembly is as follows: 18" cast in place concrete wall, Tremco 250 Water proofing cured (60mils - self sealing), Mechanically fasten EPS with Hilti X-IE Insulation Fastener 4” 6-100 PH 52 No. 376475. Complete the Dryvit (hole patch, base cait, finish, etc.) per manufature's recommendations.
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| Answer / Solution |
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Wind load values, based on EPS thickness, fastener patterns and pullout values are provided by the fastener manufacturer. The fastener patterns and data listed in Dryvit publication DS135 were provided by
Wind-lock Corp. and by ITW-Buildex. No data was provided for 4 inch thick EPS.
Dryvit Systems, Inc. has not performed testing to establish a specific fastener pattern for using the X-IE Insulation Fasteners. Hilti must provide specific fastening patterns for EIFS.
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FAQ ID # 106
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