How Much Space is Needed for a Wet Room with Tub and Shower?
When designing a wet room that includes both a tub and shower, it‘s important to plan for ample space to allow easy movement and access to all fixtures. Though exact dimensions depend on your unique needs, here are some general guidelines for wet room layouts with a tub and shower:
Recommended Minimum Dimensions
For a wet room that comfortably accommodates a tub, shower enclosure, toilet, sink and storage, aim for a minimum floor space of 10-12 square meters (approximately 108-130 square feet). This allows plenty of clearance for accessing fixtures and moving around the room.
If you‘re working with a smaller existing bathroom, you may be able to get by with 9 square meters of floor space, but this is the absolute minimum recommended.
| Bathroom Type | Recommended Minimum Size |
|---|---|
| Wet room with tub + shower | 10-12 square meters |
| Small wet room | 9 square meters |
According to a 2021 survey of contractors, the average total cost for installing a wet room is $4,500-$6,500. Larger wet rooms with more fixtures will fall at the higher end of this range.
Allow Adequate Clearance Between Fixtures
When laying out your wet room, allow at least 55 cm (22 inches) of clearance between the tub, shower, toilet and sink. This gives enough space to easily step in and out of the shower, sit on the toilet and access the sink without bumping into other fixtures.
For the shower itself, a minimum of 90 cm (36 inches) clearance is ideal, which gives comfortable room for washing and maneuvering.
| Fixture | Recommended Clearance |
|---|---|
| Between tub, shower, toilet & sink | 55 cm (22 inches) |
| Inside shower | 90 cm (36 inches) |
Ensuring proper clearance as recommended by home building codes also makes your wet room safer and more accessible.
Carefully Measure Your Fixtures
Take careful measurements of any tub, shower enclosure, vanity and toilet you plan to install. Draw these out on a floor plan to scale to ensure your layout allows adequate clearance.
Factor in the swing of doors and space needed for shelving or other accessories. Having accurate dimensions ensures your wet room design fits everything appropriately.
Here are the average dimensions for common wet room fixtures:
| Fixture | Average Dimensions |
|---|---|
| Bathtub | 60-75 cm wide x 150-180 cm long |
| Shower Stall | 90 x 90 cm or 120 x 120 cm |
| Pedestal Sink | 50-65 cm wide x 80-90 cm high |
| Toilet | 35-40 cm wide x 45-50 cm deep |
Measure twice – cut once! Accurate dimensions ensure your fixtures and furniture fit nicely.
Make the Most of Limited Space
For smaller bathrooms, consider using space-saving fixtures like:
- Corner shower units
- Recessed or low-walled shower enclosures
- Pedestal sinks rather than vanities
- Wall-hung or compact toilets
You can also install the shower and tub along the same wall to maximize floor space. Just be sure to allow adequate room between the two.
Creative Wet Room Layouts
Here are some layouts that make great use of limited wet room space:
-
Angled tub – Install a corner tub at an angle to open up floor space
-
Glass partition – Use a glass wall to divide the shower and toilet areas
-
Curbless shower – A zero-barrier shower blends seamlessly with the floor space
-
Floating vanity – Wall mounted sinks save space underneath
Don‘t be afraid to get creative with your layout! An experienced designer can help make the most of the space you have available.
Consider Door Access
When planning your layout, ensure there is ample clearance around doors that access the wet room. Standard interior doors are approximately 76 cm (30 inches) wide. Allow extra space for the door swing so fixtures are not cramped.
It‘s recommended to have at least 50 cm clearance around the wet room door swing. This prevents the door from hitting fixtures or cabinets when opened.
Ventilation and Drainage
Adequate ventilation and drainage are crucial in a wet room. Plan ductwork, vents and plumbing rough-ins early so these don‘t become an afterthought once your layout is set.
At minimum, you‘ll need:
- Exhaust fan capable of at least 15 air changes per hour
- Waterproof floor drain appropriately sloped and positioned
- Vents to allow moisture to escape
Insufficient ventilation can allow mold and mildew to take hold. Don‘t cut corners here!
Work With Professionals
While you can design a wet room layout yourself, always have professional tradespeople handle the installation, especially for waterproofing, plumbing and electrical. Trying to DIY these complex elements risks leaks, mold and other problems down the road.
Hiring a qualified contractor provides peace of mind and protects your investment. Focus on the fun design parts and let the experts handle the critical installation!
Ideal Materials for Wet Rooms
Choosing suitable building materials is key to creating a safe, functional wet room. Some top choices include:
| Location | Recommended Materials |
|---|---|
| Walls | Waterproof membrane, FRP panels, tile |
| Floors | Mosaic tile, slip-resistant porcelain, vinyl |
| Fixtures | Stainless steel, enameled steel, acrylic |
| Grout | Epoxy grout, silicone sealant |
| Plumbing | PVC, copper, PEX |
Consult your contractor on selecting finishes that are both stylish and waterproof.
Permits for Wet Room Conversions
Many jurisdictions require permits for plumbing and electrical work involved in wet room installation. Check with your local building authority about requirements in your area.
You may need to submit plans and have an inspector sign off once work is complete. This ensures your DIY wet room meets code and is safe to enjoy.
Be sure to research permit costs – they typically range from $200-$500 depending on the scope of work.
Creative Solutions for Small Wet Rooms
If you‘re working with a cramped space, get creative with your layout and choice of fixtures:
- Install a corner shower enclosure rather than a standard stall
- Use a narrow vanity or pedestal sink
- Look for compact wall-hung or triangular toilets
- Opt for a tub with integrated showerhead
- Install fold-down seats in the shower to save space
- Use glass shower doors rather than curtains
- Include recessed shelves built into the wall for storage
With some innovative thinking, even the smallest bathroom can be transformed into a functional wet room. Here are some real-life examples of beautifully designed small wet rooms:
This 3‘ x 5‘ wet room uses a corner shower and floating vanity to maximize space. Photo credit: Bauformat.
A narrow linear drain and wall-mounted fixtures keep this petite wet room feeling open. Photo credit: Porcelanosa.
Focus On Quality Waterproofing
No matter the size, thoroughly waterproofing your wet room is non-negotiable. This critical step prevents leaks, mold growth and water damage.
Be sure to:
- Seal all joints, corners and plumbing fixtures with waterproof tape and membrane
- Waterproof the walls at least 2 feet high
- Apply tanking compound to seal floors and walls
- Slope floors 1/4 inch per foot towards drains
- Caulk around fixtures and trims
- Install a waterproof floor with tile underlayment
Don‘t cut corners on waterproofing – this can compromise the integrity of the entire wet room.
I always recommend using a professional Grade A waterproofing membrane certified for use in wet rooms, such as those made by Schluter Systems or Laticrete. Paying extra for quality waterproofing now avoids expensive repairs down the road.
In Summary
When designing your wet room layout, focus on allowing ample space between fixtures, at least 10-12 square meters total floor space, quality waterproofing, creative use of space-saving fixtures if needed, and integrating necessary ventilation and drainage.
I hope these guidelines give you a great starting point for planning your dream wet room. Don‘t hesitate to reach out if you need a hand bringing your vision to life! With proper planning and professional installation, even a modest-sized bathroom can be transformed into a luxurious wet room oasis.