Not all EIFS systems are built the same way, and understanding which type is on your home can tell you a lot about its moisture risk profile. Here’s a breakdown of the two main categories.

Barrier-Style EIFS

Older EIFS installations, particularly common through the 1990s, were often “barrier” systems — designed on the assumption that the exterior finish alone would keep all water out. The problem: no exterior finish is perfectly waterproof forever, and once water gets behind a barrier system, it has no way to escape. This design is the primary reason EIFS earned a poor reputation in some regions during that era.

Drainage EIFS Systems

Modern EIFS installations use a drainage design: a water-resistant barrier with a drainage plane (often a grooved or matted layer) behind the insulation board, allowing any incidental moisture that does get through to drain out at the base of the wall rather than accumulating.

How to Tell Which System You Have

This isn’t always obvious from the exterior. Home age is a starting clue — homes built or re-clad after the early-to-mid 2000s are more likely to have drainage systems — but the only reliable way to confirm is through inspection, sometimes requiring a small exploratory opening at the base of a wall.

Why This Matters for Repair Decisions

If your home has a barrier-style system, ongoing maintenance vigilance is even more important, since there’s no backup mechanism if the exterior finish is breached. In some cases, converting a barrier system to a drainage system during a major repair or resurfacing project is worth considering.

Discussing Your System

During inspection, we’ll identify which type of system your home has and factor that into our repair and maintenance recommendations accordingly.