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Unread 09-13-2020, 02:04 PM   #1
qwertyjjj
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Mortar for under water heater

I'm finding self leveling concrete a bit expensive and I have 2 bags of mortar mix lieing around.
I need to add a 3/4" layer of cement/mortar for a water heater in a closet - just 4' x 2.5'
How many sq ft does a 60lb bag of mortar cover?
I can only find calculators for brick laying
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Unread 09-13-2020, 03:26 PM   #2
jerrymlr1
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19 sq ft @ 3/8"comes to mind. Half that at 3/4". The specs are sometimes on the back of the bag.
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Unread 09-13-2020, 04:15 PM   #3
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Curious why you'd want a 3/4" layer of mortar mix under a water heater. This to be a wear layer?

The 60-pound bags of various cement-based mixes can usually be counted upon to be about half a cubic foot in volume. Maybe a little less, depending upon just what it is you have.

How long them bags been "laying around?"
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Unread 09-13-2020, 07:21 PM   #4
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I would bet that the weight of a water heater spread out over 3-4 tiny feet will break that mortar into little pieces if it's over a wood subfloor.
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Unread 09-13-2020, 07:29 PM   #5
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I bet it will do that if it's over a concrete subfloor, Kevin.
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Unread 09-15-2020, 08:15 PM   #6
Tiger Mountain Tile Inc
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I'm thinking Jerry is about right on his figures. Two bags should do it
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