What type of installation method is required ?
What is the nailing schedule (how far apart are the nails placed) or what type of adhesive is needed (always use manufacturers adhesive products-if not warranties may be voided).
Has the wood floor material been properly handled prior to installation ? Has it acclimated at the job site( In HVAC conditions- those that are normal for the area under regular living conditions?).
Are the moisture contents of the wood floor products and the subfloor compatible?

Whether you, your architect, builder, or designer helps in the decision making about your wood floors, you must do your homework. The following are additional details you must consider, or have specified when knowing what hardwood floor will be installed.

Floated - usually 1/8" urethane foam sheeting or may be glued directly to subfloor
Glued - using Manufacturers recommended adhesive
Nailed or Stapled (all 3/4" material) - as per manufacturers nailing schedule