What is the requirement for decorative trim in relation to EIFS?

The requirement for decorative trim in relation to Exterior Insulation and Finish Systems (EIFS) is that it should not be face-nailed through EIFS. This guideline is crucial as face-nailing can compromise the integrity of the EIFS system. The EIFS is designed as a continuous insulation and finish system, which relies on maintaining a seal to prevent moisture infiltration.

When trim is face-nailed through the EIFS, there's a risk of creating punctures that can allow water to penetrate behind the finish surface, potentially leading to moisture damage, mold growth, and deterioration of the insulation beneath. To properly secure decorative trim, methods that do not disrupt the EIFS integrity, such as using appropriate sealants or adhesives, are preferred. This ensures the EIFS remains watertight and performs as intended without compromising its protective qualities.

Understanding this requirement helps ensure that building practices align with the best methods for maintaining the longevity and performance of EIFS systems in residential construction.