Bathroom floors take more abuse than almost any other surface in your home: standing water, daily foot traffic, and the weight of a toilet and vanity. When something goes wrong, the fix can be anything from one new tile to a completely new subfloor.
This guide covers how to replace a floor in a bathroom, and how to handle the smaller repairs that often come first. It is based on 30 bathroom floor projects we have completed in Fairfax, Loudoun, and Prince William counties.
First, find out what is really wrong
A floor problem you can see is often a symptom of one you cannot. Before deciding on a repair, we check:
- Does the floor flex? Press down near the toilet and tub with your heel. Movement means the subfloor or framing needs attention.
- Are there dark stains or soft spots? These usually mean water has been getting under the floor for a while.
- Is the damage in one spot or spread out? One cracked tile is a repair. Cracks across the room usually point to movement underneath.
How to fix a loose bathroom floor tile
A single loose tile usually means the adhesive underneath failed in that spot. Fixing bathroom floor tiles one at a time is very doable if you have spare tiles from the original installation:
- Remove the grout around the tile with a grout saw.
- Lift the tile carefully, and scrape the old adhesive off the floor and the back of the tile.
- Check the subfloor underneath. If it is soft or wet, stop here, because the problem is bigger than one tile.
- Set the tile in fresh thinset, level it with its neighbors, and let it cure.
- Regrout and seal.
If several tiles are loose, the cause is usually a floor that flexes, and resetting them will only buy a few months.
How to fix cracked bathroom tile
To fix cracked bathroom tile, the process is the same as above: cut out the grout, break out the cracked tile in small pieces so you do not damage its neighbors, and set a replacement. The hardest part is usually matching the tile. If you do not have spares, we can often take one from an inconspicuous spot, such as under the vanity, and replace that one with a close match.
How to replace a rotted bathroom floor
Rot is most common around the toilet and along the edge of the tub, where small leaks go unnoticed for years. In our recent projects, 1 in 4 bathroom floors in homes built before 1990 had some rot in the subfloor.
Here is how to replace a rotted bathroom floor:
- Remove the toilet, vanity, and old flooring.
- Cut out the damaged subfloor back to solid wood, ideally to the center of the nearest joists.
- Check the joists. If they are soft, sister new lumber alongside them.
- Fix the leak that caused the rot, whether that is a wax ring, a supply line, or a failed tub seal.
- Install new plywood subfloor, glued and screwed to the joists.
- Add a cement board or uncoupling membrane, then lay new tile.
How to replace a floor in a bathroom, start to finish
A full floor replacement follows the same steps, with or without rot: remove fixtures and old flooring, repair and level the subfloor, install an underlayment made for tile, lay the new floor, grout and seal, then reinstall the toilet and vanity. Most of our bathroom floor replacements take 3 to 5 days.
If you are deciding which material to use, our guide to the cost to remodel a bathroom’s flooring compares the most popular options.
What floor repairs cost in Northern Virginia
| Repair | Typical range in our recent projects |
|---|---|
| Reset or replace 1 to 3 tiles | $250 – $500 |
| Full floor replacement with new tile | $2,500 – $5,500 |
Across our last 10 full floor replacements in Fairfax County, the average was $3,900 for a typical 40 to 60 square foot bathroom. If the wood under the tile has rotted, repairing it adds to the cost, and we will show you the damage before any extra work begins.
If more than a few tiles are loose or cracked, the floor is telling you something about what is underneath. It is worth finding out before it spreads.
Get your floor looked at
If your bathroom floor is cracked, loose, or soft, we can tell you whether it needs a repair or a replacement. See our flooring and walls page for what we do, or contact us for a free at-home consultation.