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
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.
