Remodeling services
Wet room installation: the whole floor becomes the shower
No curb, no tray, one waterproof room. Why the floor framing decides whether it can be done. Plan your remodel: tell us the project and a person replies.
Plan Your Remodel What it costs
Written by HyreRemodel Research Desk Primary-source research and fact checking
The short answer
Wet room installation turns a bathroom into one waterproofed space where the shower area has no curb or tray and the floor slopes to a drain. The waterproof membrane covers the whole floor and runs up the walls, not just inside a shower.
Because the floor must slope without a step, the subfloor is usually lowered between the joists or the whole floor is raised, and that framing work decides whether a wet room is practical.
What decides a wet room installation?
Getting slope with no curb means recessing the subfloor or raising the room. Joists and a slab answer differently.
Floor and walls, lapped and sealed at the drain, corners and pipe penetrations.
A linear or point drain placed so water never reaches the door.
Plan your wet room
Free, with no obligation. A person at HyreRemodel replies by email. Matching with remodeling contractors is not live yet.
Can your bathroom become a wet room?
Joist depth and direction, or a slab.
In a small room everything gets wet; a glass screen helps.
The floor must stay low enough at the door to keep water in.
A fan that vents outside, or one that can be added.
A ceiling under the bathroom pays for any leak.
In what order does a wet room get built?
Drain location, slope and framing plan; permit for plumbing and any structural change.
Fixtures, flooring and wall surfaces removed to framing.
Subfloor recessed or floor built up; blocking added for fixtures and grab bars.
Drain set at the right height for the slope; supplies run.
Floor and walls waterproofed, with seams, corners and pipes sealed.
The floor is plugged and filled to check for leaks before tile.
Tile laid to the slope, fixtures set, final inspection.
Which wet room build are you planning?
| Approach | What it means |
|---|---|
| Recessed subfloor | Subfloor dropped between joists in the shower zone. Depends on joist depth and may need engineering. |
| Raised floor | The whole room built up to create slope. Leaves a step at the door. |
| Slab floor | Concrete cut and re-poured to slope to the drain. |
| Wet zone with screen | A fixed glass panel keeps spray off the toilet and vanity. See shower door installation for glazing rules. |
What belongs in a wet room proposal?
The waterproofing is the job. Ask for it in detail.
and how far up each wall it goes.
: recessed, raised or slab, with the framing plan.
, and the slope.
before tile, and who witnesses it.
rating and where it vents.
at the door.
and who closes them.
Where are the safety lines in a wet room?
Water and structure are the two things that fail. Both are inspected work.
Removing or altering a load-bearing wall, and cutting or notching joists beyond the permitted limits, are structural changes. They need a building permit, and the building department can require an engineer to size the beam.
2021 International Residential Code R303.3 requires a window of not less than 3 sq ft, at least half of it openable, or mechanical exhaust of 50 cfm intermittent or 20 cfm continuous. The fan must exhaust directly to the exterior. Terminating into an attic, crawl space, garage or any other interior space is not allowed.
Outlets and lights near the wet zone have ground-fault and location rules under the National Electrical Code. A licensed electrician places them.
A wet floor needs tile suited to wet areas. Ask for the slip rating on the spec sheet.
Have your building department and licensed trades confirm the details for your house.
What changes the budget for a wet room?
No figures here, by policy. See the cost guide and the bathroom remodel calculator.
| Factor | Why it changes the number |
|---|---|
| Floor method | Recessing, raising or cutting a slab. |
| Membrane area | The whole room, not one shower. |
| Drain type | Linear drains and point drains differ. |
| Engineering | If joists are cut or reinforced. |
| Glass screen | Optional, and its own line. |
HyreRemodel publishes no national average price for this work. Size, finish level, whether plumbing, wiring or walls move, the age of the house and regional labor rates move it far enough that a single figure would mislead.
Can the floor be lowered under the shower?
Ask a contractor to look at the floor framing from below or through a register. Deep joists or a basement below give options. Shallow joists or a finished ceiling below may mean raising the whole floor instead.
What to ask before you sign
What to have ready before the first meeting
.
, with photos if there is access.
, including any mobility needs.
Where this goes wrong
In a wet room, water reaches the whole floor.
A leak found after tile means tearing it out.
Water should run away from the exit, not toward it.
Your inquiry
Tell us about the remodel
Nothing goes to a remodeling contractor unless you agree.
Free, with no obligation: a person at HyreRemodel reads your request and replies by email. Matching with remodeling contractors is not live yet, so this is not a quote, and nothing goes to a contractor unless you agree.
Plan Your Remodel
One short form: your address and how to reach you. A person at HyreRemodel reads it and replies.
Questions
What is the difference between a wet room and a walk-in shower?
Do wet rooms leak?
Does a wet room need a permit?
Is a wet room good for accessibility?
Does HyreRemodel build wet rooms?
Written and audited by
HyreRemodel Research Desk
Primary-source research, data analysis and fact checking
We are a research desk, not a remodeling contractor and not a sales floor.
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Sources & retrieval dates
Information on this page is general and may vary by location, building code, zoning, the condition of your house and your own circumstances. It is not legal, design or engineering advice.
HyreRemodel is not a remodeling contractor: we do not design, build or manage remodeling work, and we do not supervise or warrant it. This page explains the work so you can judge a proposal and a contractor.