When the attic is not used by people, basic covering panels are a safe option. They are sturdy, can fit through an attic access opening and support items up to 200 pounds. These grid panels are ideal under boxes, luggage and holiday decorations. Panels are made of hard plastic and do not warp with exposure to heat and moisture like wood planks. The system can be installed fairly easily by the do-it-yourselfer with nails or left loose. They will also fit comfortably between joists. The panels can also be used as steps to reach plumbing, heating and electrical controls as needed.
For regular attic floor use, attach pine, maple or bamboo wooden planks to joists. They can be stained, varnished or treated with a moisture-proof finish to coordinate with other décor. Depending on the type chosen, this is one of the least expensive options. It can be installed by the homeowner to keep costs down. Footsteps will gravitate to the room below, so use carpeting to reduce the effects. Consider installing a plywood subfloor to make a sturdier surface.
Once a sturdy subfloor is in place, vinyl can be installed for a nicer finish. Whether in rolls or tiles, attaching the vinyl is fairly simple, but time consuming for the do-it-yourselfer. Laminate will protect the vinyl from scratches, gouges and discoloration. There are a number of types, depending on the manufacturer. Some resemble wood, while others look like ceramic or stone.