Damp rotten particleboard holds water.
How to replace under kitchen sink cabinet floor.
Btw some sink areas have a gap in the framing bottom panel connecting to a forced air vent or rarely to a hydronic heating loop or bare pipe or radiator be sure to leave that open if you have such because that is designed to keep the under cabinet area and pipes warm to prevent pipe freezing.
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Moisture destroys the particleboard most cabinets use for the floor below a kitchen sink.
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If left unrepaired the leaks can cause significant damage to the cabinet floor by promoting wood rot warping and mold or mildew growth.
To replace your top mounted kitchen sink start by shutting off the water supply valves then turning on the faucet to drain any remaining water from the line.
Water leaks are a common occurrence under kitchen sinks.
Next put buckets under the water supply lines disconnect the lines with an adjustable wrench and remove the drainpipe with pliers.
And once it starts swelling your only option is to replace it.
You will need to build a block under the floor to support the center seam.
The way i normally do it is to install the left half first then the right half.
The space beneath the kitchen sink is exposed to high levels of humidity and may even be exposed to water through leaky plumbing.
But you don t have to cut out the entire bottom.
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.
Over time this can cause the wood under the sink to rot.
Let s face it it s easy to get water on the floor of your sink base cabinet.
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