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EIFS - A Brief History
What Is EIFS
The Causes Of Most EIFS Problems
Why Inspect EIFS
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Why EIFS, DRYVIT, STUCCO Can Be A Problem? 

Homes clad with EIFS (Exterior Insulation and Finish Systems) a.k.a. synthetic stucco have a very strong tendency to retain moisture between the sheathing of the home and the finish system. The design of EIFS, unlike other systems (brick, stone, siding, etc.), does not allow the moisture to drain out. The problem is water intrusion and entrapment in the wall cavities. The moisture can sit in contact with the sheathing for a prolonged period and rotting may result. Damage can be serious. 

While a brick or stone wall will contain an internal drainage plane behind it and weep holes along the bottom edge to allow for water drainage, moisture intruding into the EIFS wall cavities is more damaging because it cannot readily escape back out through the waterproof EIFS exterior as quickly as it can through brick veneer, stone, or cement stucco, leaving the internal sheathing and wood framing vulnerable to rot and decay.

Successful installation of EIFS depends upon keeping water out of the wall cavities.  Consequently, in an effort to keep the water out, an industry-wide installation standard was developed that details installation procedures to be followed.  In conjunction with this, the EIFS manufacturers then trained and certified applicators to install their products and supplied them with materials which met specification standards.

But, here is where the system begins to break down, because unfortunately, the manufacturers failed to take into account the realities of residential construction:

 

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