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HomeTechnicalAsk the ExpertsIf a shower floor slope is 1/4" per foot are other horizontal...

If a shower floor slope is 1/4″ per foot are other horizontal surfaces also 1/4” per foot?

QUESTION

I have a quick question about how much slope a shower bench or shower dry-off area should have.

The TCNA Handbook states that “All horizontal surfaces, for example shower seats, sills, curbs, etc., must slope towards drain.”

Shower floor slope is 1/4″ per foot. Are the other horizontal surfaces (bench, etc.) also supposed to be 1/4” per foot?

ANSWER

Yes, the correct slope for all horizontal surfaces is 1/4″ vertical (minimum) up to 1/2″ (maximum) for every 12” of horizontal run. 

– Mark Heinlein,
NTCA Training Director

Mark Heinlein
Training Director at  |  + posts

Mark Heinlein, CTI#1112, is the former Training Director for the National Tile Contractors Association (2015-2024) and a former Ceramic Tile Education Foundation evaluator for the Certified Tile Installer program. Heinlein owned Mark Heinlein Surfaces of Negaunee, Michigan prior to working with NTCA.

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