What are the causes of a hardwood floor buckling?

Written by shelly mcrae
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Hardwood floors are made from organic material, wood. Wood expands and contracts and the planks of your hardwood floor will do so as well. As such, they can be subject to buckling. Buckling is when the hardwood boards separate from the subfloor, lifting upwards. The planks may show separation at the joints and the floor become uneven because of buckling. There are environmental factors that can cause buckling, or it may be because of faulty installation.

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Water

Hardwood floors will buckle if they are subjected to excess water. For example if a toilet overflows,and the water reaches the hardwood-floored hallway, the hardwood planks swell with moisture. Because the wood needs to accommodate this excess moisture, it moves upward and the expansion causes it to buckle.

Humidity

Hardwood floors can buckle in excessively humid environments. This is why hardwood is not recommended for small, windowless, bathrooms or kitchens. Controlling the humidity through fans and ventilation may alleviate the problem, but if the buckling causes the boards to warp, they will need to be replaced.

Acclimation

Before hardwood floors are installed, they need to be acclimated to the immediate environment. The process involves allowing the hardwood floors to sit within the room or rooms in which they will be installed for a minimum of two weeks. The boards will adjust to the range of temperature and humidity within the building. If the flooring is not allowed to acclimate, the boards will expand or contract beyond the limits of the environment. This results in buckling within one year after installation.

Poor installation

Using the wrong sort of products during installation may result in buckling. If gluing to a cement subfloor, for example, you need to use an adhesive designed to join wood to cement. Moisture barriers are important if installing in damp climates. A moisture barrier is a thin sheet of polythene that is laid between the subfloor and the hardwood. Without this barrier, moisture can cause buckling. Another important part of installation is the expansion gap. The flooring should be installed leaving a gap of 1/4 inch to 1/2 inch around the perimeter of the room. This gap allows room for expansion, thus reducing the chances of buckling because of excess moisture in the hardwood floor.

Care

Do not wet mop your hardwood floors, as the water can seep into the wood and result in buckling. To clean your floors, use a product intended for hardwood. These products usually contain polyurethane, a compound that provides protection against moisture.

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