Remove the drain lines and garbage disposer if there is one to get maneuvering room.
How to floor under sink.
Over time this can cause the wood under the sink to rot.
If the pipes under your kitchen sink are exposed you may not want to fill the gaps around them with spray foam which isn t the most attractive material in the world.
Protect the floor with a single piece of vinyl sheet flooring.
Next cut a piece of 1 2 in.
Flooring stores can probably give you waste cuts of the vinyl sheet for free.
Remove the old swollen floor.
Plywood to the interior size of the sink base.
You can protect the floor inside your kitchen sink cabinet with a sheet of vinyl flooring.
The space beneath the kitchen sink is exposed to high levels of humidity and may even be exposed to water through leaky plumbing.
Use a dehumidifier in the room or a cabinet dryer if plumbing repairs don t address the problem of.
If left unrepaired the leaks can cause significant damage to the cabinet floor by promoting wood rot warping and mold or mildew growth.
Then trace a cutting line about 3 in.
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.
If you can t then just lay it in there.
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.
The floor inside your kitchen sink cabinet is highly susceptible to damage caused by an occasional water leak or condensation dripping from sweaty pipes.
In from all four edges.
Then cut out the middle section of the swollen sink base with a jigsaw.
Repair any leaks under the sink immediately to prevent damages to the flooring and cabinetry.