Schluter®-KERDI-SHOWER-FRS™

Floor recessing system for curbless showers

Schluter®-KERDI-SHOWER-FRS™ is a floor recessing system that simplifies the construction of curbless showers. Top-mounted galvanized steel brackets fasten to the joists and the surrounding subfloor perimeter to support recessed subfloor panels, providing a stable base that preserves structural integrity and reduces conflicts with plumbing, HVAC, and electrical. Designed for both dimensional lumber and I-joists, it provides a fast, dependable foundation for modern, accessible shower designs. KERDI-SHOWER-FRS integrates seamlessly with the Schluter-Shower System, creating a complete and fully waterproof assembly for dependable curbless shower installations.
  • Galvanized steel brackets provide solid support for recessed subfloors
  • Designed for curbless shower installations with KERDI-DRAIN point drains
  • No modification to joists maintains structural integrity
  • Attach brackets directly to the top of joists: no need for ledger boards
  • Compatible with I-joists and dimensional lumber spaced up to 19.2" (488 mm) o.c.
  • Lowers the subfloor by 11/16" (17.5 mm)
  • Compatible with a variety of KERDI-SHOWER prefabricated trays
  • Top fastening minimizes interference with plumbing, HVAC, and electrical within floor cavities
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Product type

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J Brackets fasten to the top of joists and support FRS system inserts in the recessed section of the floor.

P Brackets fasten to the unmodified subfloor at the perimeter, including along wall bottom plates, and support FRS System inserts in the recessed portion of the floor.

Shims allow 5/8” subflooring to be used with KERDI-SHOWER-FRS. Shims are applied to P Brackets to accommodate the additional thickness needed for a secure interface with 5/8” subflooring.

Schluter®-KERDI-SHOWER-FRS™  is installed in the floor under the shower assembly and requires no special maintenance or care. The systems components are resistant to mold and fungi.

For a step-by-step guide on installing the Schluter®-KERDI-SHOWER-FRS™  floor recessing system for curbless showers, visit our installation instructions.

Data sheets

Technical-Data-Sheet_Schluter-FRS_07-2026
181.88 KB
Pdf

Product Table

KERDI-SHOWER-FRS_fr
398.84 KB
Pdf

Warranties

Schluter-KERDI-SHOWER-FRS 5-Year Limited Warranty
276.23 KB
Pdf
Q:

What is the maximum allowable joist spacing for KERDI-SHOWER-FRS applications?

A:

KERDI-SHOWER-FRS can be used with joists spaced up to...

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Q:

Do I have to cut into the floor joists to install KERDI-SHOWER-FRS?

A:

No, KERDI-SHOWER-FRS is designed to recess the subfloor between the joists, eliminating...

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Q:

How many brackets do I need for my KERDI-SHOWER-FRS installation?

A:

The number of brackets required depends on your specific installation conditions, including joist spacing, joist orientation, and...

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Q:

What adhesives can I use on the KERDI-SHOWER-FRS brackets?

A:

Schluter®-KERDI-FIX or any non-expanding construction adhesive can be used on...

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Q:

How far should waterproofing extend beyond the shower threshold in a curbless shower?

A:

In a curbless shower, waterproofing should ideally extend across the entire bathroom floor, as it must be installed in...

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Q:

Does the orientation of the plywood inserts matter in KERDI-SHOWER-FRS applications?

A:

Perpendicular placement is preferred, but KERDI-SHOWER-FRS plywood inserts may be installed with...

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Q:

Can I use different screws with KERDI-SHOWER-FRS?

A:

No, the screws included with KERDI-SHOWER-FRS kits have been specifically selected and thoroughly tested for...

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Q:

Why do I have leftover brackets and screws in my KERDI-SHOWER-FRS kit after installation?

A:

KERDI-SHOWER-FRS kits were designed to provide the materials needed for most installation conditions...

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Q:

Can I recess the entire floor using KERDI-SHOWER-FRS?

A:

No, KERDI-SHOWER-FRS is only approved for...

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Q:

Can I use KERDI-SHOWER-FRS with linear drains?

A:

No, KERDI-SHOWER-FRS cannot be used with linear drains. The system is designed for...

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Q:

Do I need to pre-drill (i.e., create pilot holes) before fastening the brackets?

A:

No, pilot holes are not required. However, predrilling can increase the speed, ease, and...

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Q:

I lost some of the screws from my KERDI-SHOWER-FRS kit, what should I do?

A:

If you have lost screws from your KERDI-SHOWER-FRS kit, please contact...

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Watch & Learn
About the product

How to install the Schluter®-KERDI-SHOWER-FRS Floor Recessing System

How to install the Schluter®-KERDI-SHOWER-FRS Floor Recessing System

16:40

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Prefabricated Substrates

Schluter®-KERDI-SHOWER-T/-TS/-TT

Drains / Shower Drains

Schluter®-KERDI-DRAIN

Waterproofing

Schluter®-KERDI-FIX

Uncoupling (DITRA)

Schluter®-DITRA & DITRA-XL

Uncoupling (DITRA)

Schluter®-DITRA-HEAT

Uncoupling (DITRA)

Schluter®-DITRA-HEAT-DUO

Waterproofing (KERDI)

Schluter®-KERDI-BAND

Waterproofing (KERDI)

Schluter®-KERDI