Updated at: 09-06-2022 - By: Sienna Lewis

Expect to pay between $150 and $200 for this service. The cost of replacing water-damaged wood under the sink comes to this amount.

Leaks from a blocked sink or a loose fitting are the most common causes of water damage. It’s critical that you take good care of your pipes and do routine maintenance on them.

Got Water Damage Under Your Sink?

Not only are you not alone, but you’re not the only one. It’s easy for water to destroy wood and wood flooring if it isn’t covered in waterproof materials like plastic, vinyl, or tile. if the wood isn’t properly treated following water damage, mold might grow and pose serious health risks.

Fixing a water damaged cabinet base underneath kitchen sink

With some basic tools and some spare time, it’s possible to replace the rotten wood under your kitchen sink on your own.

How to Replace the Wood Under Your Kitchen Sink

Wood hardener may be all that is needed to fill in minor areas of mold damage that have been discovered early on in the process of mold remediation.

You may need to replace the wood floor under the sink if the mold has spread to more than half of the floor. Either hire a handyman for $150 or do it yourself for less than $50 to accomplish this.

Tools and Materials for Replacing a Board Underneath a Sink

With these supplies, you can replace the water-damaged wood under your kitchen sink on your own.

  • Power was able to observe
  • The blade of a hand saw
  • An electric chisel
  • Clamping device for bars
  • Hammer
  • Flashlight
  • A broom and a trash can
  • Protective eyewear
  • Wearing a dust mask is a good idea
  • The right-sized piece of wood
  • Two-by-fours
  • Screws
  • Nails

Step-by-Step Guide for Replacing the Wood Under Your Sink

  1. Remove anything from under the sink, including the garbage can.
  2. The wood board under the sink should be wiped clean of any accumulated dirt and debris.
  3. Take a closer look at the wood.
  4. Mark the wood with a pencil so you know exactly where to make the cuts.
  5. To make cutting a straight line with a 2×4 easier, secure them using a bar clamp.
  6. Put on protective goggles and a dust mask to protect your eyes and lungs from dust inhalation.
  7. Drill few holes in the blade if you’re using a hand saw to make it easier to start cutting.
  8. If you require a power tool, there should be an electrical outlet under the kitchen sink.
  9. You will save time by using an electric saw, but some of the motors can overheat and stop working as a result of this. Because of this, it’s important to take a break from your power saw from time to time.
  10. As you work on different parts of the board, adjust your bar clamp accordingly.
  11. While cutting, you can either cut an opening large enough to put your camera in and take pictures or put your hand in and feel around the underside of the board you’re cutting to see if there’s any wood underneath. You’ll be able to cut the board more effectively after seeing this.
  12. When cutting the inner corners, use a flashlight to help you see better.
  13. To get to the inner corners of the board with some power saws, you’ll need a smaller power tool, such as a hand saw or other smaller power tool.
  14. Remove the rotten board off your path once you’ve finished cutting the board.
  15. After you’ve removed the rotten board, clear the area of any trash that may have fallen on the way.
  16. Using 2x4s, build a platform for the new board to rest on.
  17. Put a new board in place by cutting it to the correct size.
  18. For screws, use a drill to create holes in the new board.

How to Prevent Water Damage to Wood Floor Under a Sink

You will need to cover the wood floor under the kitchen sink with waterproof materials like plastic or vinyl in order to prevent water damage in the future.

Purchase a few pieces of vinyl tile instead of a roll of wide vinyl or plastic and cut them to size. Glue-down vinyl tile and self-adhesive vinyl tile are also available. Here are the procedures to installing self-adhesive vinyl tiles:

  1. The board should be wiped down.
  2. Layout the vinyl tiles to see if you like it before buying them.
  3. Cut the vinyl tiles to the correct dimensions by drawing lines on both sides of them.
  4. Cut the vinyl tiles using scissors or a utility knife.
  5. Place the vinyl tiles in the proper location after removing the backing paper.
  6. Glue can assist self-adhesive vinyl tiles adhere to a smooth surface.
  7. Glue can be applied to the board or to the vinyl tiles’ backsides.
  8. Small nails can be used to hold the vinyl tiles in place if desired.
  9. Seal the edges of the vinyl tiles with waterproof sealant once you’ve installed all of them.

It is important to apply a layer of waterproof material after replacing the decayed wood. It doesn’t matter whether you use plastic or vinyl; whatever works best for you should be used.

We Repair Water Damaged Sink Base Cabinet Floor

For this project, we used vinyl tiles since they were easy to work with. They’re simple to apply, but extra glue and nails are needed to keep them in place. Caulk was also applied to seal around the edges. We could have saved money by purchasing a single sheet of vinyl instead!

How to Protect a Cabinet Under a Sink

Water damage to sink cabinets is a common occurrence. If the sink plumbing is properly maintained, water will always find its way into the cabinetry, causing the wood to rot and grow mold. While no cabinet can be completely protected, a polyurethane finish will help keep the wood from deteriorating.

Preparing the Cabinet

First, use a wood cleaner-bleach on the cabinets in order to remove all the grime and oil. Allow the cabinets to air dry for 24 hours after cleaning them thoroughly of any filth, grease, and mold. Then use a heat lamp to finish drying the wood. Sand the wood in stages after it has dried completely. If you’re using sandpaper, begin with a rough 100-grit sheet and work your way up through 150-grit and eventually 200-grit.

Seal the Wood

To ensure a clean and clear surface for your sealer, you’ll first need to remove any sawdust from your hardwood surface. If you have a wand attachment on your vacuum, use it to clean out the cabinet. After vacuuming, use a tack cloth to ensure the wood is fully dust-free. Brush on the sealer and allow it to set for 24 hours after the surfaces have been cleaned and dusted.

Applying the Polyurethane

There are two kinds of polyurethane: oil-based and water-based. Even while washing your brushes with soap and water afterward is an option, stay away from water-based cleaners. Oil-based polyurethane is the finest choice for water-resistant coatings. In order to ensure that the wood is properly protected, apply the oil-based polyurethane finish with long, smooth strokes that overlap slightly. Cover the openings around the pipes with caulk to prevent leaks. When applying the polyurethane, wait at least 24 hours between applications.

Seal All the Openings

All the openings where hot and cold water pipes enter the cabinet and the waste pipe exits it must be sealed in order to entirely protect the kitchen sink cabinet’s inside from water damage. It’s simplest to use an expanding foam insulation aerosol spray, which may be found at any hardware or home center store.

FAQs

How much does it cost to repair water damage under kitchen sink?

If it’s only slightly delaminated or discoloured, a piece of plywood or linoleum can be used to cover up the damage. Based on whether he needs to buy materials or has junk lying around that can be used, the project will cost between $150 and $200.

How do you dry a cabinet under a sink?

Unscrew the Drawer Hinges In order to remove any lingering moisture, leave the cabinet open for 24 hours. For optimal airflow, Rytech recommends removing the cabinet doors completely. To speed up the drying process, place a fan near the sink and turn it on.

How do you waterproof a cabinet under a kitchen sink?

Under-Sink Cabinet Waterproofing: 5 Tips & Tricks Seal the area around the sink. Seal the cabinets with caulk. Apply urethane. Seal all openings around the water pipes. Install mats beneath the sink.

Can you fix swollen particle board?

Waterproofing Kitchen Sink Cabinets Using These 5 Methods Protect the area around the sink by caulking it. Make sure the cabinets are caulked. Apply polyurethane Make sure there are no gaps around the pipes. Install mats under the sink.

Does homeowners policy cover water damage?

Your home’s insurance policy should cover you in the event of a sudden or accidental water leak. A water line break or a leak in one of your appliances will be covered by this policy. If hail or wind causes a hole in your home through which water enters and causes damage, you are covered.

How much does it cost to replace cabinet under sink?

Changing the Bottom of a Cabinet in a Kitchen The cost of replacing the bottom of a kitchen cabinet ranges from $150 to $200 on average. A common cause of this is a leak behind the kitchen sink.

How much does it cost to replace wood under kitchen sink?

You may need to replace the wood floor under the sink if mold has spread to more than half of the floor. Either hire a handyman for $150 or do it yourself for less than $50 to accomplish this.

Why is it wet under my sink?

Probably the most common cause of water under your sink is a leaking drain. Fractures in the plumbing lines under your sink can be caused by shifting plumbing lines, worn-out connectors, or even pipe corrosion. This causes water flowing down your drain to slowly spill out.

Can you repair swollen MDF?

Replacing water-damaged medium-density fiberboard baseboard is the best option. However, if the damage is minor, you may be able to repair it on your own. If the MDF hasn’t disintegrated or separated, the swells can be sanded down.

Can you repair laminate cabinets?

Depending on the extent of the damage, you may be able to repair or reface the door without having to replace the entire unit. While it’s common to replace a whole piece of laminate when there are cracks, if only peeling occurs, you may be able to repair the laminate with glue.

How do you fix peeling melamine cabinets?

You can repair the melamine coating with an instant adhesive, such as Super Glue or Krazy Glue, if only a few spots have come loose. Instant glue can be used to reconnect a cabinet’s flaking melamine coating. However, if there are extensive portions of loose melamine cabinets, you will need to paint the cabinets.

How do you waterproof wood cabinets?

If you want to keep your wood dry for many years to come, there are three certain methods. A hand-rubbed finish made of linseed or Tung oil is a gorgeous and long-lasting option. Apply a polyurethane, varnish, or lacquer finish to the wood. It’s possible to both stain and seal wood at the same time.

How do you weatherproof cabinets?

Waterproofing Cabinets Under Sink Mats: 10 Tips. Rubber Coating. Use Vinyl Tiles. Shelf Liners That Are Waterproof. Make Your Wooden Surfaces Waterproof. Replace Leaking Pipes. Use Caulk on All of It! Check The Backsplash.

How do I protect the bottom of my kitchen cabinets?

Waterproofing Cabinets Under Sink Mats: 10 Tips. Rubber Coating. Use Vinyl Tiles. Shelf Liners That Are Waterproof. Make Your Wooden Surfaces Waterproof. Replace Leaking Pipes. Use Caulk on All of It! Check The Backsplash.

Can water damaged particle board be repaired?

Waterproofing Cabinets Under Sink Mats: 10 Tips. Spray Rubber Coating. Use Vinyl Tiles. Shelf Liners That Are Waterproof. You Should Waterproof Your Wood Surfaces Replace Leaking Pipes. Use Caulk on All of It! Check The Backsplash.

How do you fix swollen wood cabinets?

Tips for Waterproofing Cabinets and Mats Under the Sink. Spray Rubber Coating. Use Vinyl Tiles. Sturdy Waterproof Shelf Linings You Should Waterproof Your Wood Surfaces Replace Leaking Pipes. Insulate Everything. Check The Backsplash.

What should you not say to an insurance adjuster?

Tips for Waterproofing Cabinets and Mats Under the Sink. Spray Rubber Coating. Use Vinyl Tiles. Sturdy Waterproof Shelf Linings You Should Waterproof Your Wood Surfaces Replace Leaking Pipes. Insulate Everything. Check The Backsplash.

How to Replace a Sink Base Cabinet Floor (DIY) | Family Handyman

How do I make a successful water leak claim?

Waterproofing Your Cabinets Under the Sink Mats – 10 Tips. Spray-on Rubber Coating.. Vinyl Tiles can be used. Shelf Liners that are waterproof. You Should Waterproof Your Wooden Surfaces Replace Pipes That Leak. Everything should be caulked. Verify The Backsplash.

What is covered under water damage?

Water damage from appliances, fixtures, or plumbing leaks, bursts, or overflows are normally covered under this policy. In most cases, insurers will only pay for a liquid leak if it is inadvertent or sudden.

Conclusion

When you know how much it will cost to replace water-damaged wood under the sink, you can plan your repairs more effectively. Prior to beginning any repairs, it is important to determine the nature of the damage. Don’t forget to insulate your pipes so that you don’t have to deal with costly repairs if one leaks.