Real Estate Term of the Day: EIFS EIFS (aka: Exterior Insulating and Finish Systems) – a synthetic alternative to natural stucco, a cement-based material used for finishing the exterior of houses and other buildings (Barron’s Dictionary of Real Estate Terms) According to Whole Building Design Guide (WBDG), “Exterior Insulation and Finish System (EIFS) is an … More Real Estate Term of the Day: EIFS (Exterior Insulating and Finish Systems)