Plywood to the interior size of the sink base.
How to floor under sink.
Then lay it to fit under the sink and flash cove it up the back and front of the space under the sink where possible.
Protect the floor with a single piece of vinyl sheet flooring.
If you can t then just lay it in there.
If left unrepaired the leaks can cause significant damage to the cabinet floor by promoting wood rot warping and mold or mildew growth.
Protects the wood and easy to take out dry the wood under it and put back if a leak occurs.
Then cut out the middle section of the swollen sink base with a jigsaw.
The space beneath the kitchen sink is exposed to high levels of humidity and may even be exposed to water through leaky plumbing.
Next cut a piece of 1 2 in.
If you have a particle board floor underneath your sink that is showing signs of water damage you can tear it out and replace it to prevent the growth of mold.
Use a dehumidifier in the room or a cabinet dryer if plumbing repairs don t address the problem of.
Repair any leaks under the sink immediately to prevent damages to the flooring and cabinetry.
Remove the old swollen floor.
Water leaks are a common occurrence under kitchen sinks.
You can use caulk to fill gaps less than about 1 2 inch wide and you can fill wider gaps by stuffing them with steel wool and caulking over it.
Then trace a cutting line about 3 in.
The floor inside your kitchen sink cabinet is highly susceptible to damage caused by an occasional water leak or condensation dripping from sweaty pipes.
Remove the drain lines and garbage disposer if there is one to get maneuvering room.
Flooring stores can probably give you waste cuts of the vinyl sheet for free.
In from all four edges.