A flooded hardwood floor can have up to 40 moisture content and can retain well above the normal amount of moisture for weeks if left to dry on it s own.
Wood floor got wet and buckled.
Floor buckling is the most extreme reaction to moisture in a hardwood floor.
Buckling can occur for a number of reasons.
For example if a toilet overflows and the water reaches the hardwood hallway the hardwood planks swell with moisture.
Degree of water.
Nails may begin to lift glue may release causing separation between floor pieces and tongue and groove floors often cup or buckle when moisture has been absorbed.
Moisture is the downfall of many hardwood floors.
Hardwood floors will buckle if they are subjected to excess water.
Fortunately this is not a common occurrence.
If spilled water sits atop the flooring for too long or if moisture seeps into the wood from the subfloor.
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Floor buckling happens most often after a floor has been flooded for an extended period of time.
Due to the porous nature of wood moisture can be easily absorbed into the material.
How to fix a buckled hardwood floor.
Sometimes floors that appear dry to the naked eye can be soaked and the job might require industrial size fans and other equipment that removes water beneath the wood down into the subfloor.
Buckling also called cupping or crowning is the most extreme case of too much moisture.
So your flooring may show signs of staining from small spills the wet floor may also begin to buckle and cup when large amounts of water are absorbed as the planks swell.
Whether there is too much weight on the wood flooring or exposure to moisture understanding why buckling occurs is the first step to fixing it.