AFF / Above Finish Floor

What is AFF / Above Finish Floor?

Definition of AFF / Above Finish Floor in Construction

Abbreviation used on construction plans and contract documents to indicate an elevation above the finished floor. In many cases, the elevation of the finish floor is a benchmark elevation, with other dimensions noted as AFF or above this finish floor height. Most architects and engineers will use this designation as a universal identification, understanding that the majority of individuals that are involved in construction will understand and follow. Many times the height of ceilings is indicated as 9 feet AFF which identifies the height of the ceilings, additional dimensions off of the finish floor, such as elevation of chair rails, crown moldings, wall hangings, etc. are indicated as a dimension AFF.