Tips for Wood Flooring Storage, Installation, & Maintenance
A wood floor can be a durable and beautiful investment. But the same natural structure that gives wood its beauty also makes it absorb and release moisture.
Wood is a hygroscopic material, so it constantly interacts with its environment, absorbing or releasing moisture depending on the conditions around it.
For wood flooring, that means if the flooring’s moisture content (MC) is too far out of balance with the conditions around it, the result can be cupping, crowning, gaps between boards, or, in extreme cases, flooring lifting from the subfloor.
Over time, all wood adjusts to its surroundings, a process called equalizing or acclimating. If you understand that give-and-take and control how fast it happens, taking a few precautions at each stage of the wood’s life, moisture doesn’t have to lead to flooring problems.
Manufacturing
When green, freshly cut lumber arrives at a mill, the first thing to address is its moisture level. Because MC affects everything from the wood’s dimensions to warping, excess moisture must be removed to get the lumber to a predictable, workable condition.
Mills typically do this in large kilns that use a combination of heat and airflow to remove excess moisture. Sawmills invest a great deal of time and money in optimizing this process so every piece of lumber is at its best. Moisture measurement is critical to lumber quality, grading, and production.
From there, the lumber moves on to the flooring manufacturer, where moisture measurement is just as important. For solid or engineered wood flooring, excess moisture, or an overly dry factory environment, can lead to splitting, cracking, warping, adhesive failure between layers, or generally substandard flooring.
Storing Wood Flooring
All the manufacturer’s best efforts can be undone if the finished flooring is exposed to excessively wet, humid, or dry conditions afterward. The distributor, the installer, and the homeowner all need to pay the same attention to moisture conditions when storing wood flooring that the manufacturer did.
How is that best done?
A controlled environment is best for both long-term and short-term storage. Flooring is dried to an MC suited to interior use. For most of the United States, the USDA Forest Service Wood Handbook recommends an average of about 8% (6% to 10% for individual pieces) for interior flooring, and the target varies by manufacturer, species, and region. Wherever the flooring is stored, temperature and relative humidity (RH) should be stable and close to the conditions where it will be installed, to prevent big swings in its MC.
Ideally, flooring left in the manufacturer’s packaging in a controlled environment will change very little. Periodically checking the flooring with an accurate moisture meter, and the ambient temperature and RH with a thermo-hygrometer, is the best insurance against problems.
Installing Wood Flooring
Before installation, the wood flooring needs to acclimate to the job site. The goal is to minimize the effects of the seasonal and daily changes the floor will be exposed to. Careful acclimation before installation goes a long way toward preventing moisture problems and extending the life and look of the floor.
When the flooring is delivered, the job site should be enclosed and at normal living conditions, with the HVAC system running. Check the initial MC of a random sample of boards, then let the flooring acclimate to the site. If the manufacturer’s instructions allow, stack the boards in loose crisscross stacks so air can move more freely around each board.
Fans can also help move air. Test the subfloor too, with a wood moisture meter for a wood subfloor or in-situ RH testing for concrete, to make sure it’s at the right moisture level. Don’t stack wood flooring directly on a concrete subfloor.
The best way to know when the flooring has acclimated and is ready to install is with an accurate moisture meter set for the flooring species. The flooring is ready when its MC readings have stabilized at a level that’s right for the space and, over a wood subfloor, within the difference from the subfloor’s MC that the flooring manufacturer and National Wood Flooring Association guidelines allow.
Free Download – Wood Flooring Installation: What To Expect
Wood Floor Maintenance
After the floor is installed, it’s still important to check it routinely for signs of moisture problems. Some seasonal changes, like small gaps, are normal, but prolonged exposure to moisture can affect the floor’s performance.
Leaking plumbing or appliances, groundwater intrusion, or severe, prolonged swings in humidity can all take their toll on a wood floor. A wood moisture meter can help you spot problem areas before they become irreversible.
Tony Morgan is a senior technician for Wagner Meters, where he serves on a team for product testing, development, and also customer service and training for moisture measurement products. Along with 19 years field experience for a number of electronics companies, Tony holds a B.A. in Management and his AAS in Electronics Technology.
Last updated on October 13th, 2026
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