EIFS, Synthetic Stucco What is EIFS?EIFS stands for Exterior Insulation and Finish Systems. The product is also called synthetic stucco, and refers to a multi-layered exterior finish that's been used in European construction since shortly after World War II, when contractors found it to be a good repair choice for buildings damaged during the war. The majority of repairs to European buildings were to structures constructed of stone, concrete, brick, or other similar, durable materials.
EIFS in North America
North American builders began using EIFS in the 1980's, first in commercial buildings, then applying it as an exterior finish to residences--mostly wood frame houses--using the same techniques that had been successful in Europe.
There are three layers to EIFS
Inner Layer Foam insulation board that's secured to the exterior wall surface.
Middle Layer A polymer and cement base coat that's applied to the top of the insulation, then reinforced with glass fiber mesh.
Exterior Layer A textured finish coat.
Synthetic Stucco vs. Traditional Stucco
- Synthetic stucco is soft and sounds hollow when tapped.
- Traditional stucco is hard and brittle, and sounds solid when tapped.
Maintaining EIFS
- Any opening, such as door and window frames and the areas around flashings, must be sealed to prevent water from seeping behind the EIFS.
- Gutters should be kept clean and positioned to drain away from the house.
- Foam should not extend below grade.
- Items that penetrate the stucco must be sealed.
In other words, no moisture should be able to seep behind the EIFS.
Signs of EIFS Problems
- Mold or mildew on the interior or exterior of the home.
- Swollen wood around door and window frames.
- Blistered or peeling paint.
- Cracked EIFS or cracked sealant.
EIFS Today
Newer EIFS systems include a drainage arrangement to help keep moisture from being trapped behind the covering. |
