Igloo effect on EIFS

Framing below grade is a termite trap.

The igloo effect on EIFS is when the foam sheets buckle and protrude from the wall. This is an indicator of severe rot in the framing. The wet framing sags and warps, causing the foam board to buckle. The igloo effect can be seen mainly under roof intersections, chimneys, and other areas of water infitration of EIFS. The foam sheets are usually 2 feet by 3 feet and can be seen easily in the bright sunlight.