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Unread 07-05-2016, 09:33 PM   #1
Gobbell1
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Minimum Shower Curb Height

I'm re-doing a 15 year old shower and I want to minimum curb height.

I am on a slab and the drain is in the center, roughly 24" from the curb.

What is the minimum curb height I can safely use?
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Unread 07-05-2016, 09:57 PM   #2
Tool Guy - Kg
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That can get a little more involved than my simple answer, but I'll start with it: Code (depends on your jurisdiction) generally says the curb can be as low as a minimum of 2" above the height of the top of the drain grate.

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Unread 07-06-2016, 07:46 AM   #3
Tiger Mountain Tile Inc
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A standard curb in generally 3 2x4's high- 4.5 inches. Over concrete you may want to use bricks in which you may get away with 4 inches- one 3.5 inch brick and a 1/2 mud joint at the bottom.

It depends on the shower. You need a minimum of 1.5 inches for the top mud bed plus 1/4 inch per foot slope minimum for the preslope. Shower size and drain height both factor in. But in general 4-4.5 inches works for many showers.
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Unread 07-06-2016, 05:56 PM   #4
Gobbell1
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Guys,

Thank you all for your help.

My shower is rather small, at 4' x 4'. It currently has 3 2x4s for a curb which is extremely high.

Given the 1.5" minimum height + the 1/4" slope/foot, sounds like my edge minimum is 2". I'll play with that as a starting point and see how it looks.

Thanks again guys.
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Unread 07-07-2016, 09:30 AM   #5
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Curt, you need to calculate your slope from the drain to the farthest point in your shower, which is almost always a corner, and the slope must be a minimum of 1/4" per horizontal foot.
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Unread 07-07-2016, 09:49 AM   #6
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Please, whatever you decided, do yourself a favor and use some kind of block or brick rather than using wooden 2x4's.
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