Quick Answer: Removing a tub for a large glass shower makes sense when the tub goes unused, the space allows a shower roomier than a standard tub alcove, and another bathtub remains in the home. Plan plumbing, waterproofing, and glass together, because shower glass is measured last and depends on everything built before it.
The garden tub that looked luxurious in 1998 now holds towels and collects dust. The tub-shower combo in the hall bath forces everyone to step over a wall every morning. For many Houston homeowners, trading that tub for a spacious glass shower is the single change that makes a bathroom feel current. It’s also a construction project with more moving parts than it appears. Whether you’re a homeowner in Southampton weighing the idea or a remodeler planning the job, here’s what to decide before demolition starts.
Why This Matters
- It changes how the room works every day. A walk-in shower removes the step-over, opens floor space, and can be designed with a low or no threshold, which matters for aging in place and anyone with mobility concerns.
- It affects resale. Many real estate agents advise keeping at least one bathtub in a house, because buyers with young children often look for one. Removing the only tub can narrow your pool of buyers.
- Most of the work ends up hidden. Drain lines, shower pan slope, and waterproofing disappear behind tile. Errors there don’t show until they cause damage.
- The glass shows everything. Frameless glass is the most visible element and the last one installed. Out-of-plumb walls or uneven curbs show up as uneven gaps and awkward hardware.
Is Your Bathroom a Good Candidate?
A Tub-to-Shower Conversion Is a Strong Fit When
- Your primary bath has a drop-in or deck-mounted tub that rarely gets used.
- Another bathroom in the home has a tub for children, guests, or future buyers.
- The footprint lets the shower grow into former tub deck or corner space.
- You want easier entry now or plan to stay in the home long term.
Think Twice When
- It’s the only tub in the house and you have young children or may sell soon.
- The space is limited to a standard 60-inch alcove, where a shower only about 30 inches deep can feel cramped and splash beyond the glass.
- The budget won’t cover proper waterproofing and a quality pan. Cutting corners there costs more later than keeping the tub.
Planning the Layout: Footprint, Plumbing, and Floor
Size and Features
Converted showers feel best when they use more than the old tub footprint. Extending into a removed tub deck creates room for a bench, a recessed niche, and a spray pattern that stays inside the glass. Place the valve so you can turn on the water without stepping into the spray, ideally reachable from the door side.
Drain Location and Size
Tub drains usually sit at one end, while shower drains are often centered or replaced with a linear drain along one wall. Shower drains are frequently upsized from typical tub drains, especially when rain heads or multiple shower heads are added. Plumbing changes generally call for a licensed plumber and a permit.
Slab vs. Pier-and-Beam Foundations
Many older homes in Southampton and Boulevard Oaks sit on pier-and-beam foundations, which usually allows drain relocation from below. Most newer Houston homes, including many rebuilt lots in Afton Oaks, are on concrete slabs, where moving a drain means cutting and patching the slab. That difference can swing the budget and schedule significantly.
Curb or Curbless
A curbless, zero-threshold shower looks seamless and is easiest to walk into, but the shower floor has to sit lower than the bathroom floor. On a slab, that means recessing the concrete. On pier-and-beam, framing is adjusted. A low curb is simpler and still reads as modern.
Choosing the Glass for a Converted Shower
Door and Panel or Walk-In Panel
A walk-in design with a single fixed panel and no door works best in longer showers, where water loses energy before it reaches the opening. Shorter or narrower footprints usually need a hinged door with a fixed panel to keep water contained. Explore layouts on our frameless glass shower options page or see our shower doors.
Thickness and Support
Most frameless conversions use 3/8″ tempered glass; 1/2″ adds rigidity and a more substantial look for tall or wide panels. Large walk-in panels typically need a support bar to the wall or ceiling, and full-height steam designs require a sealed transom. See our glass shower enclosures for full-height configurations.
Clarity and Maintenance
Low-iron glass removes the green tint of standard clear glass, which stands out against white and marble tile. Adding ShowerGuard® protected glass helps a large, highly visible enclosure resist the cloudy buildup that Houston water leaves behind.
Common Tub-to-Shower Conversion Mistakes
- Ordering glass before tile is finished. Tile thickness and wall plumb change the final dimensions. Consequence: panels that don’t fit and a second fabrication cycle.
- Putting the niche, valve, or grab bar where glass hardware needs to go. Consequence: hinges or clamps shifted to less secure spots, or tile rework.
- Getting the pan slope wrong under a walk-in panel. Water should run away from the opening. Consequence: puddles on the bathroom floor every time someone showers.
- Treating glass as waterproofing. Glass keeps spray in; it doesn’t protect the walls. Consequence: skipped membrane details that fail behind the tile.
- Ignoring door swing. A shower door must swing outward and clear the toilet, vanity drawers, and towel bars. Consequence: a door that hits cabinetry or can’t open fully.
- Removing the home’s only tub without thinking about resale. Consequence: a harder sale to families, or buyers pricing in the cost of putting a tub back.
DIY vs. Professional Tub-to-Shower Conversion
| Phase | DIY | Professional Team |
|---|---|---|
| Tub removal | Cast iron tubs can weigh several hundred pounds; injury and floor damage risk | Safe demolition and disposal |
| Drain and valve relocation | Typically requires a licensed plumber and permit | Code-compliant plumbing, inspected |
| Pan and waterproofing | Small slope or membrane errors cause major leaks | Proper slope, membrane, and flood testing |
| Tile | Uneven walls make glass fit harder | Plumb, square surfaces ready for glass |
| Glass measuring and installation | Heavy tempered panels; no adjustment after tempering | Field-measured, fabricated, and installed by glass specialists |
| Accountability | You absorb the cost of mistakes | Licensed, insured trades stand behind their work |
Bottom line: homeowners can take on design choices and finish selections. The plumbing, waterproofing, and glass should be handled by professionals.
How a Tub-to-Shower Conversion Comes Together
- Early glass consultation. Talk with your glass company during design, before walls close, so blocking, curb height, and panel layout are planned.
- Demolition and rough plumbing. The tub comes out, drains and valves are relocated, and wood blocking is added where glass hardware will mount.
- Pan and waterproofing. The floor is sloped, membranes are installed, and the pan is flood-tested.
- Tile and fixtures. Walls, floor, curb, and niche are tiled and trim fixtures installed.
- Glass field measurement. Once tile is complete, the opening is measured precisely for plumb and square.
- Fabrication and installation. Glass is cut, drilled, tempered, and installed, with silicone left to cure before the first shower.
Why Choose Buffalo Glass Co
Experience
Since 1956, we’ve installed shower glass in Houston bathrooms of every age, including older homes where walls are rarely square. That experience helps us plan glass for conversions where the original room was never designed for a large shower.
Reliability
Remodelers count on us to measure when tile is ready and install when the schedule says. Homeowners get free, clear quotes and straightforward advice. Learn more about our remodel and new construction glass work.
Quality and Technology
We fabricate in-house with no subcontractors, offering low-iron glass, protective coatings, and hardware sized to each panel’s weight. We’re Houston-owned, licensed, and insured.
Service Area and Coverage
We serve homeowners and contractors throughout greater Houston, including Southampton, Afton Oaks, and Boulevard Oaks. Browse our residential shower glass services or see finished bathrooms in our project gallery.
Frequently Asked Questions
Does removing a bathtub hurt resale value in Houston?
Removing a tub from the primary bath is widely accepted, especially in higher-end homes, as long as another bathroom has a tub. Removing the only tub in the house is more likely to limit interest from buyers with young children.
How big should a shower be when it replaces a tub?
A shower that uses only a standard 60-by-30-inch alcove works, but it can feel tight. Extending the depth or using space from a removed tub deck creates a noticeably more comfortable shower and makes a doorless design more practical.
Can I have a walk-in shower with no door?
Yes, when the shower is long enough for spray to stay inside and the floor slopes away from the opening. In smaller footprints, a door with a fixed panel keeps water where it belongs.
When should the glass company measure?
After tile, grout, and the curb are complete. Measuring earlier risks panels that don’t fit, because tile and setting materials change the final dimensions of the opening.
Is a curbless shower possible on a slab foundation?
Yes, but the slab usually has to be recessed so the shower floor sits below the bathroom floor. It adds cost and time, so it’s best decided early in design.
Plan Your Glass Shower and Save 15%
Buffalo Glass Company is offering 15% off all glass and materials through October 31, 2026. Whether you’re a homeowner exploring a tub-to-shower conversion or a remodeler ready for field measurement, we’ll help you choose glass that fits the space and the way you live. Call (713) 774-7495 or request a free quote online.