What is EIFS?
Exterior Insulation and Finish Systems (EIFS) is an insulating, decorative,and protective finish system for exterior walls that can be installed on practically any type of commercial or residential construction. While giving the appearance of traditional stucco, EIFS is actually a multi-layered wall system that consists of separate components including insulation board, reinforcing fiber mesh, base coating, and a finish coating.
Why does EIFS have problems?
Deviation from industry standard installation guidelines is considered to be the largest reason for EIFS problems. Although there are other reasons, many of the problems associated with EIFS are related to improper or shoddy installation methods. Shortcuts deviating from proper installation practices are common and many EIFS installers have had no training in its installation.
Most major EIFS manufacturers have documented installation practices to be followed by those using their products. By not following the manufacturers’ installation guidelines the installers have not only constructed pathways for moisture infiltration but improper installation oftentimes can void the manufacturers’ warranty.
What types of problems can EIFS have?
The main problem occurring with EIFS is moisture infiltration. This is because EIFS relies on a perfect seal at the exterior surfaces. Since there is rarely a “perfect seal” in the real world, the system is predisposed to entrapment of moisture inside the system. Water can enter the system where seams and seals fail, where moisture migrates from inside the building, and where openings (windows, doors, etc.) are present.
Water infiltration is a big problem because the water trapped behind the EIFS cannot dry out quickly toward the outside of the building. And depending on the rest of the wall system design and installation, there may also be limited drying potential to the inside. Limited drying potential in combination with water leakage can lead to moisture buildup inside the wall, and eventually lead to mold growth and structural decay. Damage can be serious because the extent of the damage done is generally hidden from view until too late.
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