I would replace the entire floor rather than piecing in the back half the reason being is that the floor is usually notched dado d into the sides.
Replace cabinet floor under kitchen sink.
How to replace the bottom piece of wood under my kitchen sink.
Let s face it it s easy to get water on the floor of your sink base cabinet.
Remove the cabinets and screw a plywood filler piece to the subfloor about inch inside the line where it will be under the cabinets.
The way i normally do it is to install the left half first then the right half.
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.
We ll never understand why cabinetmakers use particleboard for the base but they do.
Moisture destroys the particleboard most cabinets use for the floor below a kitchen sink.
Water leaks are a common occurrence under kitchen sinks.
But you don t have to cut out the entire bottom.
Dewalt hole saw bits.
The trick is cutting the tile around the cabinets using the proper tools.
This piece should be at least 2 inches wide and about inch thicker than the total thickness of the flooring including any vapor barrier or cushion.
Typically cabinets come before flooring.
Affiliate tool links for this video.
And once it starts swelling your only option is to replace it.
In most cases given standard flooring heights you will install the cabinets before the floor covering.
Over time this can cause the wood under the sink to rot.
The space beneath the kitchen sink is exposed to high levels of humidity and may even be exposed to water through leaky plumbing.
How to replace rotted wood under the sink.
Damp rotten particleboard holds water.
It s possible to replace kitchen tiles on the floor or wall without removing cabinets even if they re built on top of old tiles.
However this process can be difficult labor intensive and time consuming.
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