The greatest step you can take toward maintaining solid wood floors is to keep water away from them. If water spills, get it up before it can soak into the grain or between boards. Also use mats or rugs near doorways to keep water -- and grit -- from being tracked on to your new floor.
Humidity is water in the air. Hardwood floors are sensitive to humidity, expanding and contracting with changes in the surrounding air. So one big step in maintaining solid hardwood flooring is keeping the house’s humidity in the 40% to 50% range year-round. Homes in arid regions often use humidifiers for personal comfort; hardwood floors need the same consideration. Homes and flooring in humid regions require dehumidifiers to remove water from the air. In some regions, both humidifiers and dehumidifiers are needed for the comfort of people and solid hardwood floors.