The best single threshold shower base depends on your alcove dimensions, drain position, and installation plan. DreamLine SlimLine models offer several size options, including 32-by-60-inch and 32-by-54-inch bases; the Carlton Marquette is a flexible choice when a removable flange may suit different threshold configurations. Compare the measurements and drain details below before choosing, since a base must match the planned layout.
| Product | Size | Best For |
|---|---|---|
| DreamLine SlimLine DLT-1132600 | 32 x 60 inches | Standard-width alcoves and a textured floor |
| DreamLine SlimLine DLT-1134600 | 34 x 60 inches | A deeper 60-inch alcove base |
| Carlton Marquette | 42 x 34 inches | Flexible threshold configuration |
| DreamLine SlimLine DLT-1132540 | 32 x 54 inches | A shorter alcove footprint |
| DreamLine SlimLine DLT-1136360 | 36 x 36 inches | A square shower footprint |
DreamLine SlimLine 32 x 60-Inch Base
This white base measures 32 inches deep by 60 inches wide and has a 2¾-inch height. Its single threshold is designed for a three-wall installation, and the drain is centered. A textured SlipGrip floor is intended to provide enhanced slip resistance, while the high-gloss, nonporous acrylic surface is described as easy to clean.
Best for: Buyers fitting a 32-by-60-inch alcove who want a textured floor surface. It is selected for its clearly specified dimensions, center drain, and cleaning-oriented finish. The product fits standard 2-inch compression drain assemblies, but the drain is not included. Confirm the drain position against the technical drawing before installation.
DreamLine SlimLine 34 x 60-Inch Base
The DLT-1134600 measures 34 inches deep by 60 inches wide and stands 2¾ inches high. It is a white, single-threshold base for a three-wall alcove, with the drain centered across the width. The listing identifies it as cUPC certified and calls for direct-to-stud installation before backerboard or other wallboard is installed.
Best for: Renovations where a 34-by-60-inch footprint matches the framed shower area. The additional depth compared with the 32-by-60-inch option is the key sizing distinction. Professional installation is required according to the product information, so this is less suited to buyers seeking a listed do-it-yourself installation process. Check the technical drawing for the exact drain location.
Carlton Marquette Convertible Threshold Base
The Carlton Marquette is listed as a 42-by-34-inch shower pan with a center drain and glossy white finish. Its removable flange can convert the base between single- and double-threshold configurations. The listing also describes an integral three-side flange intended to support waterproofing and structure.
Best for: Buyers who need threshold configuration flexibility and whose planned opening matches the listed dimensions. The removable flange is the distinguishing reason to consider it over fixed single-threshold options. Its ability to convert configurations does not remove the need to verify the finished wall layout and installation requirements. The product information provided does not specify the drain assembly, so confirm drain compatibility before purchasing.
DreamLine SlimLine 32 x 54-Inch Base
This DreamLine base measures 32 inches deep by 54 inches wide, with a 2¾-inch height and center drain. It is designed for a three-wall installation and has a textured SlipGrip floor. The listing describes durable construction intended to reduce flexing and notes that professional installation is recommended. It fits standard 2-inch compression drain assemblies; the drain is not included.
Best for: An alcove that needs a 54-inch-wide base rather than a 60-inch model. It combines a smaller width with the stated textured surface and center-drain layout. Avoid choosing it based on width alone: verify the complete footprint and exact drain position against the room and technical drawing.
DreamLine SlimLine 36 x 36-Inch Base
The DLT-1136360 is a square, 36-by-36-inch white base with a 2¾-inch height and center drain. It uses a single threshold for a three-wall alcove. The listing identifies it as cUPC certified and specifies direct-to-stud installation before backerboard or similar wall materials.
Best for: Buyers planning a square shower footprint rather than a long rectangular alcove. Its dimensions and single-threshold design make it a distinct alternative to the 54- and 60-inch bases. Professional installation is required, so account for that requirement when planning the project. The drain is described as centered across the width; consult the technical drawing for its exact position.
Buying Guide: How to Choose a Single Threshold Shower Base
Which dimensions should you measure?
Measure the planned shower footprint, including depth and width, and compare both measurements with the base specifications. Do not assume that bases with similar widths have the same depth or drain location. Check the manufacturer’s technical drawing and account for the intended wall construction before ordering.
Does the drain position match your plumbing?
A center-drain label is not always enough to confirm alignment. Some listings specify that the drain is centered on width only, and others direct buyers to a technical drawing for its exact position. Compare that drawing with the existing or planned plumbing. For the DreamLine 32-by-60 and 32-by-54 models, the listing specifies a standard 2-inch compression drain assembly and says the drain is not included.
What installation details matter?
Check whether the base is intended for a three-wall alcove and whether it installs directly to studs. The 34-by-60 and 36-by-36 DreamLine listings call for direct-to-stud installation before wallboard and state that professional installation is required. The 32-by-54 listing recommends professional installation. Follow the product-specific instructions rather than treating all bases as interchangeable.
Should you prioritize the floor or finish?
A textured surface may be a useful feature when slip resistance is a priority; the 32-by-60 and 32-by-54 DreamLine listings describe SlipGrip textures. A high-gloss finish can be relevant if an easy-to-clean surface is important. Match these features to your needs, but do not treat them as substitutes for safe installation or bathroom-specific precautions.
When is a convertible threshold useful?
Consider the Carlton Marquette if its 42-by-34-inch dimensions fit and you may need to change between single- and double-threshold configurations. Its removable flange is the stated source of that flexibility. Verify the intended configuration, flange details, and drain compatibility before committing to the layout.
Frequently Asked Questions
What does single threshold mean?
It describes a shower base with one raised entry edge. The DreamLine models in this guide are described for three-wall alcove installations.
Are shower drains included with these bases?
The listings for the DreamLine 32-by-60 and 32-by-54 models say the drain is not included. Check the product details for the other models before purchase.
Can I replace a 60-inch base with a 54-inch model?
Only if the planned shower footprint and wall layout suit the shorter base. Compare the full dimensions and installation instructions rather than relying on width alone.
Is a center drain always in the exact middle?
Not necessarily. The 34-by-60 and 36-by-36 listings specify that the drain is centered on width only and recommend checking the technical drawing for its exact position.
Which option offers a convertible threshold?
The Carlton Marquette listing describes a removable flange that converts the base between single- and double-threshold configurations.