FEMA revised it's Technical Bulletin 2 - "Flood-damage Resistant Materials Requirements" in 2008. This bulletin provides guidance on the NFIP regulations concerning the required use of flood damage-resistant construction materials for building components located below the Base Flood Elevation in Special Flood Hazard Areas (both A and V Zones). It includes an extensive list of flood-resistant building materials and their classifications.

Here are a few starter tips:

• Fiberglass insulation holds floodwater and draws water up inside a wall. It must be removed after a flood to prevent moisture-induced mildew and decay. You can replace fiberglass insulation with closed-cell foam, which doesn't absorb floodwater and can be removed easily before a flood or cleaned easily afterward. Check with the local permit office to find out what types of interior wall coverings provide adequate fire retardation when placed over closed-cell foam insulation.
• Select floor and wall materials -- vinyl or ceramic tile, stained concrete, glass block or brick -- that resist water damage.