How to Install a Toilet Flange on a Wood Floor?

Installing a toilet flange on the wood floor is a relatively straightforward, easy process.  If you have a floor that is basically level or can be leveled with a little work, you can do this.

If you have an older home with uneven floors and walls, this may not be the best job for you.

Iinstalling a Toilet Flange on Wood Floor

How to install a toilet flange on a wood floor

Materials Needed:

  • A toilet flange (the part that holds the toilet to the floor)
  • A claw hammer and chisel (for removing old wax ring if needed)
  • A level (to make sure your floor is level)
  • Plywood sheets cut to the size of flange (if your floor is not level)
  • Rope (to hold up plywood sheets while you are leveling the toilet flange)

If you’re not sure where to start, here are some basic steps to follow when installing a toilet flange on a wood floor.

Step 1: Mark out the area where the toilet flange will be installed

Step 2: Use a drywall saw to make the appropriate cut into the wood

Step 3: Cut and remove any excess wood from around the subfloor

Step 4: Insert rubber gasket between floor and subfloor

Step 5: Apply epoxy to all air gaps and screw in pipe connectors

More Useful Frequently Asked Questions:

How do you protect a wood floor under a toilet?

As bathrooms are wet environments, you need to protect your floors with a waterproof seal to avoid damage from moisture.  The cheapest solution is to use a rubber mat.

The best way to protect your wood floor is by using a tiled floor or vinyl flooring. 

Should you caulk the toilet to the hardwood floor?

Caulking the toilet to the floor is absolutely required according to the International Plumbing Code and the Uniform Plumbing Code

The toilet to floor joint should be caulked with the tiniest bead of silicone caulk. The best way to do this is to use a caulking gun, which is a tube that has a nozzle that resembles a paintbrush. 

Caulking the toilet to the floor should be done in two or three coats. Some people use silicone caulk, but it can become hard and brittle and crack over time. 

Is a wood floor in the bathroom a good idea?

Wood is a poor choice for the floor in a bathroom. Wood is a porous material, which means that moisture will seep through it. 

The wood will also expand and contract as it absorbs and releases moisture. Sanitary wood flooring is an excellent choice for a bathroom because they are made to be non-porous, easy to clean, and resistant to water damage. 

How do you waterproof a wooden bathroom floor?

The best way to waterproof a wooden floor is by using an oil- or water-based urethane waterproofing sealer. 

However, depending on the type of wood floor you have, there are other options. 

If you have a hardwood floor, then you can use a combination of water-based and oil-based urethane waterproofing sealers. Alternatively, if you have a softwood floor, then you can use an oil-based urethane waterproofing sealer. 

How to repair a wood floor in a bathroom?

Wood flooring is prone to damage and cracking. If you have cracks, then it is best to have them filled with epoxy and sanded smooth.

If you have a large crack on your wooden floor, then it is best to have the floor replaced.


Wood flooring is a beautiful and timeless addition to any home. 

However, wood floors are not the best choice for bathrooms due to their porous nature and the fact that they will absorb moisture. 

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