How To Repair Cabinet Floor Under Sink

Plywood to the interior size of the sink base.

How to repair cabinet floor under sink.

Remove the old swollen floor. Theoretically the inside of your kitchen sink cabinet shouldn t get wet but in the real world that s just not the case. Here s a way to prevent that. Buy me a coffee.

Damp rotten particleboard holds water which promotes mold and mildew. Then cut out the middle section of the swollen sink base with a jigsaw. Remove the drain lines and garbage disposer if there is one to get maneuvering room. If left unrepaired the leaks can cause significant damage to the cabinet floor by promoting wood rot warping and mold or mildew growth.

Next cut a piece of 1 2 in. Over time this can cause the wood under the sink to rot. In from all four edges. Replacing the bottom piece of wood.

The space beneath the kitchen sink is exposed to high levels of humidity and may even be exposed to water through leaky plumbing. There s often a leak either from the trap or the faucet and if water sits on the plywood floor it will eventually rot it out. Moisture destroys the particleboard most cabinets use for the floor below a kitchen sink.