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Old 01-18-2012, 06:01 PM   #1
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mortar bed for sloping floor in bathroom


My bathroom is 8' x 8'-6" with separate tub and neo-angle shower.

I'm on a raised foundation with a 3/4" ply sub floor; but sub floor is sloping quite a lot. 1" in 8 feet, so we decided to float the floor to level it out. Will be using 12x12 porcelain tiles.

Total float thickness on the high side of the room will be 1/2" (at the doorway) and on the low side will be 1 1/2" when floor is floated.

My question is: What is the appropriate fastener or fasteners to hold-down the metal lath (diamond mesh) ? If a staple, please specify which gauge and size.

Thanks for your suggestions.

Ken

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Old 01-18-2012, 06:04 PM   #2
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mortar bed for sloping floor in bathroom


A "Jersey mud job" is not an accepted way to install tile.

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Old 01-18-2012, 06:24 PM   #3
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Use a self leveling compound--mixed with pea gravel on the deep places---

I would think removing the subfloor and sistering in some new joists would be a better method--

What is causing the problem? If you will give us the size --spacing --and unsupported length
One of us will check the span chart and see if the floor is good for tile---
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Old 01-18-2012, 08:39 PM   #4
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Hi guys,

Rusty; what Ken described is not a Jersey mud job. He's planning a real mud job, although 1/2" is too thin. Make it 3/4" or so at the thinnest and all will be good ....... if everything else is done right.


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Use a self leveling compound--mixed with pea gravel on the deep places---
Now that might be a very good way to go. Especially so if you're not all that comfy doing a mud-job. Let us know which way for more info.

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Old 01-18-2012, 08:46 PM   #5
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mortar bed for sloping floor in bathroom


thanks jazman,

Sounds good. How about the fastener for the metal lath going over 3/4 ply?

ken
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Old 01-18-2012, 09:12 PM   #6
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Staple length should be about 1/2".

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Old 01-18-2012, 09:18 PM   #7
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Jaz man,

Can you specify what gauge of staple and crown width?

Are we talking about the kind of staples shot from a staple gun? or are we talking about arrow T-50 staples from a hand stapler?

Thanks
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Old 01-18-2012, 10:42 PM   #8
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It's not that important. I have a few Arrow T-50 hand, another is electric type. Also Bostic hammer stapler. (best type, faster) I don't have the specs in from of me now. I think the crown is at least 1/2 wide, anything will work. In an emergency you can use nails, even finishing nails half driven then bent. I have used roofing nails a few times. Galvanized so they don't rust.

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Old 01-20-2012, 05:59 PM   #9
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I practiced stapling some metal lath onto 3/4" ply using 1/2" long staples using the arrow T-50 hand stapler and noticed that the staples only go in about half-way; Then I used an arrow hammer stapler and that drove the staple down pretty well.

My only concern is the holding power of this these staples. I wonder if the mortar bed might dislodge from the sub floor with the up and down shaking of one of our earthquakes.
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Old 01-20-2012, 06:13 PM   #10
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Personally, I'd know the cause of the slope. We used self leveling in our living room and were able to carpet over it...., but tile could crack if the cause is not remedied.

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