Hotels across the country are pulling out tubs and replacing them with walk-in showers. The trend is driven by guest preference, brand standards, and the reality that tubs in standard rooms see minimal use. But converting a tub alcove to a shower creates a problem: the drain location.
A standard shower pan has a center drain. A standard tub has the drain at one end. Moving the drain means cutting concrete, rerouting plumbing, and adding cost. Cast marble renovation pans solve this with an offset drain that matches the existing tub footprint. No plumbing relocation. No slab cutting. Faster renovation. Lower cost.
The quick version:
Four factors are driving the conversion trend, and none of them is slowing down.
Guest preference. Business travelers and leisure guests alike prefer showers over tubs. In post-stay surveys across multiple hotel brands, walk-in showers consistently score higher in guest satisfaction than tub-and-shower combinations. Guests perceive showers as cleaner, more modern, and more accessible.
Brand standards. Major hotel chains have updated their design standards to require walk-in showers in new construction and, in many cases, in renovated rooms. Hilton's brand standards, Marriott's renovation guidelines, and IHG's design requirements all either recommend or require tub-to-shower conversions in standard room renovations. Properties that do not comply risk losing their flag.
Modernizing older properties. Hotels built in the 1980s and 1990s typically have tubs in every room. These properties need to compete with newer construction that offers walk-in showers as standard. Converting tubs to showers is the highest-impact change a renovation can make in terms of guest perception.
ADA compliance. Walk-in showers with low thresholds are easier to make accessible than tubs. A renovation is the natural time to bring rooms up to current ADA standards. Cast marble renovation pans are available with ADA-compliant threshold heights (typically 1/2 inch or less).
Here is the technical challenge that makes tub-to-shower conversions expensive when using standard pans.
A standard shower pan is designed with a center drain. The pan slopes from all four sides toward the center, where the drain fitting sits. This is the most efficient drainage geometry and the most common configuration in new construction.
A standard tub, on the other hand, has the drain at one end. The tub drain is located at the low end of the tub — typically 4 to 6 inches from the wall. The waste line runs from that drain, through the wall, and connects to the stack.
When you remove the tub and try to install a standard center-drain pan, the drain locations do not match. The old drain is at one end. The new drain needs to be in the middle. Bridging that gap requires:
The cost of this work varies by region and building type, but the range is consistent: $300 to $500 per room for plumbing relocation, plus the time cost of keeping rooms out of service longer.
In a 200-room renovation, that is $60,000 to $100,000 in unnecessary plumbing costs.
A renovation pan — sometimes called a tub replacement pan — is designed specifically for this situation. The key feature is an offset drain that sits in the same location as the original tub drain.
The pan itself matches the standard tub footprint: 60 inches by 32 inches. The waste flange is positioned at one end, aligned with the existing drain opening. The pan is sloped from the far end toward the drain end, so water flows to the same drain location.
This design eliminates every plumbing relocation cost:
The offset drain renovation pan costs slightly more than a standard center-drain pan — typically $500 to $750 versus $400 to $600. But the net savings per room is $300 to $500 in eliminated plumbing work. For a 100-room conversion, that is $30,000 to $50,000 in savings.
Here is the math for a typical hotel room tub-to-shower conversion.
With a standard center-drain pan:
With a cast marble renovation pan:
Net savings per room: $300
The savings multiply across multiple rooms. For large renovations, the schedule compression is equally valuable. Eliminating two days of plumbing work per room means getting rooms back into revenue-generating service faster.
Tub-to-shower conversion with a cast marble renovation pan is a one-day process per room for an experienced crew.
Step 1: Remove the tub. The existing tub is cut out or unbolted and removed. The drain and waste assembly is disconnected from the tub. The drain stub is left in place — it will be used for the new pan.
Step 2: Inspect the subfloor. With the tub removed, the subfloor is exposed. Check for water damage, rot, or termite damage. Any damaged subfloor must be repaired before the pan goes in. In most hotel renovations, the subfloor is in good condition because the tub protected it.
Step 3: Level the subfloor if needed. The pan requires a level surface. If the subfloor is not level — common in older buildings — a self-leveling compound is applied. This step takes one to two hours and should cure before the pan is set.
Step 4: Set the pan. A bead of construction adhesive is applied to the subfloor in the pan footprint. The pan is lowered into position. The drain connection is made by fitting the pan's waste flange into the existing drain stub with a Fernco coupling or similar connector. The pan is pressed into the adhesive and leveled.
Step 5: Connect the drain. The drain basket is set into the pan's drain opening and tightened to the waste flange below. The weep holes are checked to ensure they are clear. Water is poured into the drain to verify no leaks.
Step 6: Install wall panels. Wall panels are installed on top of the pan flange. The bottom edge of the wall panel overlaps the pan's back flange by approximately 1/2 inch. Silicone sealant is applied along the seam. Color-matched silicone creates a clean, finished look.
Total time per room: One day for pan and wall panel installation. The room is ready for caulk cure and final inspection the following morning.
Not all renovation pans are created equal. When specifying pans for a hotel conversion project, verify these details:
Offset drain location. Confirm the pan's waste flange aligns with your specific tub drain location. Different tub models have slightly different drain positions. Some renovation pans offer adjustable drain placement; others are fixed. A pan that does not match exactly creates the same problem as a center-drain pan.
Threshold height. Most hotel brand standards specify a maximum threshold height — typically 2 inches or less. ADA-compliant rooms require a threshold of 1/2 inch or less. Verify the pan's threshold height before ordering.
Pan slope. The pan must have adequate slope for drainage — typically 1/4 inch per foot. Renovation pans with offset drains need extra slope at the far end to maintain drainage performance. A pan that does not drain properly will cause standing water complaints.
Matching wall panels. The renovation pan should come from the same manufacturer as the wall panels. Mixing brands risks fit issues at the pan-to-panel joint and color mismatch. A matched system installs faster and looks better.
Q: Can any tub alcove be converted to a shower with a renovation pan?
Most standard tub alcoves — 60 inches by 32 inches — accept a renovation pan with no wall or plumbing modifications. Non-standard sizes or corner tubs may require custom pans. Measure the alcove width, depth, and drain location before ordering.
Q: Does the existing drain pipe need to be replaced?
Not if it is in good condition. The renovation pan's waste flange connects to the existing drain stub using a standard coupling. If the old drain pipe is corroded, damaged, or below code, it should be replaced while the tub is out — but this is rarely needed in hotels with well-maintained plumbing.
Q: How does the offset drain affect showering experience?
In a properly designed renovation pan, the user barely notices the offset drain. The pan slopes from the far end to the drain end, so water flows toward the drain naturally. The walking surface is flat, with no slope felt underfoot. Users may notice the drain is at one end rather than center, but it does not affect function or comfort.
Q: Can a renovation pan be used with tile walls instead of panels?
Yes. Renovation pans work with tile, cultured marble panels, solid surface, or fiberglass. The pan flange design is universal — wall material is installed overlapping the flange. Coordinate with the wall material manufacturer to confirm the flange engagement.
Q: Do renovation pans come with a warranty?
Yes. Reputable cast marble renovation pans carry a 5 to 10 year warranty against manufacturing defects. The warranty covers cracking, delamination, and gel coat defects. Installation-related issues and damage from improper use are not covered. Always review warranty terms before purchase.
Article 3 — Cast Marble Shower Pans vs Fiberglass
Article 15 — Shower Pan Drain Configurations for Commercial Bathrooms
Article 30 — How to Specify Shower Pans for Hotel Renovation Projects
Article 36 — ADA-Compliant Shower Pans and Thresholds for Hotels
Article 23 — Hotel Bathroom Renovation: Complete Guide
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