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Floor Finishing Issues: Poor Adhesion |
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Most types of pre-finished wood floors are suitable for overcoating but not all. With a few of them, the finish just won´t adhere no matter how carefully you abrade.
If you want to recoat a pre-finished wood floor, you must check that the finish will actually adhere. Do a test on a small area. If the test is successful, you should abrade the floor very carefully, preferably using the Scrad system. Alternatively, use a grit 150 abrasive disc with a sanding machine to avoid marking the finish applied at the factory.
A new coat of finish will not adhere to a floor that has been waxed or polished. In that case, you have no choice but to sand back to the bare wood.
Practical tip: a coin is a way to test the adhesion of the finish to the underlying surface. If the finish starts to flake off when rubbed, adhesion is poor. |