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how do you fix a rotted floor under a toilet

by Valentine Hermiston II Published 3 years ago Updated 3 years ago

How to Repair the Floor Under a Toilet

  • Remove the Toilet. Turn water off to the toilet by closing the valve on the water line behind it. Disconnect the flex water line to the toilet at the valve.
  • Cut Away the Rotten Wood. Cut at least a few inches past the rotted wood under the toilet wood floor area with a reciprocating saw, up to the closest joists.
  • Make Your Measurements. Measure the open area and cut a new piece of 3/4 inch plywood to fit. ...
  • Repair Floor Under Toilet. Nail the plywood to the floor joists. Make sure to make your nails flush with the wood. ...
  • Reinstall Toilet. Clean bottom of toilet by removing old wax ring and all debris. You can use a small putty knife to scrape it and then clean with steel wool.

Part of a video titled How to Fix a Toilet - Wooden Sub-Flooring Flange Repair
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Below when the subfloor is removed supporting struts will need to be installed to give theMoreBelow when the subfloor is removed supporting struts will need to be installed to give the replacement floor more stability. They must be cut to fit and be mounted between the floor joists.

How do you repair a rotten floor under a toilet?

  • check subfloor to see if areas need to be removed. Remove the Damaged Floor Material.
  • Add the Support Framing as Needed. Use 2x6 lumber to double or “sister” the existing floor framing and provide a solid base for the new plywood subflooring.
  • Measure and Cut the Plywood.
  • secure plywood to joists.

How to replace damaged subflooring under toilet?

  • Start exposing the floor to fresh air by removing any rugs or furniture. ...
  • Any wet drywall needs to be removed anyway, so remove the ceiling drywall below the damage to expose the floor joists.
  • Create air movement with box fans ( available on Amazon ), both on top of the finished flooring and the floor below. ...

More items...

How to repair a rotted bathroom subfloor?

Subfloor damage in the bathroom usually comes from a leaking toilet, but it can also be the result of a persistent sink drain leak or even a drip behind the walls. If you can catch the leak in ...

How to replace a rotten floor under a shower?

Things You Will Need

  • Hammer
  • Screwdriver
  • Tape measure
  • Carpenter's square
  • Pry bar
  • Circular saw
  • Dimensional lumber boards
  • Plywood
  • Bolts or screws (optional)
  • Construction adhesive

More items...

How much does it cost to fix the floor under a toilet?

Average Subfloor Replacement and Installation Cost*Average Cost$550High Cost$720Low Cost$500

How do you repair a rotten bathroom floor?

0:305:46How to replace repair rotted sub floor, rotten floor. Easy! Home MenderYouTubeStart of suggested clipEnd of suggested clipFirst thing I need to do is find out which way my joists are running. I want to reach in and I canMoreFirst thing I need to do is find out which way my joists are running. I want to reach in and I can feel the joist this. Way.

How do you install a new floor under a toilet?

0:358:47How To Install Vinyl Plank Flooring Around Bathroom Toilet ... - YouTubeYouTubeStart of suggested clipEnd of suggested clipIf you have a wax one you'll have to scrape it off and this one i have a rubber gasket easily comesMoreIf you have a wax one you'll have to scrape it off and this one i have a rubber gasket easily comes off take a scrap piece of cardboard. Now place the cardboard on top of the drainage.

Can you replace bathroom floor without removing toilet?

They often ask if they should remove the toilet before installing a new bathroom floor. While it is possible to install a new linoleum or ceramic tile floor without removing the toilet, it is not recommended and actually can increase the labor involved in the project.

How do you replace a rotted bathroom subfloor?

How to Repair a Rotted Bathroom SubfloorRemove the Cabinets. Take out any cabinets sitting on top of the damaged flooring. ... Remove the Baseboards. ... Find the Nearest Joists. ... Remove the Fasteners. ... Cut Around the Flange. ... Inspect the Joists. ... Cover the Rotted Part. ... Take Your Measurements.More items...

How much does it cost to replace bathroom floor rot?

Cost to Repair Subfloor*12Subfloor repair, entire room$300 - $400Subfloor replacement, small area$400 - $500Subfloor replacement, entire room$570 - $720*Prices based on a 500-square-foot room for entire room, 100-square-feet for small area1 more row•Mar 24, 2022

How do you install a wood floor under a toilet?

Rough-In Plumbing for a Toilet on a Wood Floor You'll need to cut a 4-inch hole in the floor for the waste pipe, though, and its center should be at least 12 inches from the back wall and walls on either side of the toilet. Cut this hole with a reciprocating saw after drilling a pilot hole to get the saw started.

How do you fix a subfloor underneath?

3:035:18How to Repair Bathtub Subfloor Damage Underneath in ... - YouTubeYouTubeStart of suggested clipEnd of suggested clipOr the subflooring. So simply fill it in cut it in fill it in if the damage is bad block underneathMoreOr the subflooring. So simply fill it in cut it in fill it in if the damage is bad block underneath it. And make sure that the blocks are supported properly here's a way you can support the blocks.

How do you repair a subfloor?

2:397:43How to Remove and Replace a Rotten Subfloor - YouTubeYouTubeStart of suggested clipEnd of suggested clipThere's two ways that we can repair this floor. We could patch the existing hole with plywood.MoreThere's two ways that we can repair this floor. We could patch the existing hole with plywood.

Is it better to tile under or around a toilet?

The bathroom fitters are unanimous—if you're looking for a high quality finish, with a better seal against water damage, then always tile the floor first.

Does flooring go under toilet?

If you're installing a new floor, pedestal sink, and toilet, you should install the laminate flooring first so it's under the sink and toilet. Because laminate flooring floats above the sub-floor on top of underlayment, it will expand and contract slightly with the temperature and humidity of the room.

Should you caulk around a toilet?

Caulk Keeps the Toilet Secure Think again! Caulk keeps your toilet secure the floor, and avoids any chance of injury or toilet malfunctioning. It's actually required by the International Plumbing Code to caulk a toilet to the floor, and now knowing the reasoning behind it, why would you not want to?

Remove the Toilet

Turn water off to the toilet by closing the valve on the water line behind it. Disconnect the flex water line to the toilet at the valve. Once it has water supply and can no longer refill, flush and plunge the water out of the toilet. Unscrew nuts from the bolts at the bottom of the toilet with pliers or a wrench.

Cut Away the Rotten Wood

Cut at least a few inches past the rotted wood under the toilet wood floor area with a reciprocating saw, up to the closest joists. Discard all rotted wood and clean the drain well.

Make Your Measurements

Measure the open area and cut a new piece of 3/4 inch plywood to fit. (If your subfloor is not 3/4-inch plywood, use plywood the same size as your current subfloor).

Repair Floor Under Toilet

Nail the plywood to the floor joists. Make sure to make your nails flush with the wood.

Reinstall Toilet

Clean bottom of toilet by removing old wax ring and all debris. You can use a small putty knife to scrape it and then clean with steel wool. Set in a new wax ring and push down so it doesn't fall off when you turn the toilet over.

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