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Old 03-18-2014, 02:42 PM   #91
kdev
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USG bonded drain on concrete slab?

From post #84 above:

Quote:
Originally Posted by cx
If you want to stick your bonding flange drain to the deck mud you'll wanna get the new USG bonding flange drain. That one has fleece top and bottom.
cx,

I'm looking into the USG drain, but I can only find installation instructions/installation video for a wood subfloor install. USG shows a square with rounded off corners for the drain cutout.

I have a basement slab on grade with a round cutout.

I'm thinking about using the USG foam tray in addition to the USG drain.

1) Do you know how the USG drain is to be installed in a slab on grade shower?

2) Do you have dimensions for the blue drain support thingy?
a) overall diameter
b) subfloor cutout dimensions
c) cutout dimensions after removing the subfloor cutout template

Sorry if this has already been covered.

Thanks,
Kent
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Old 03-19-2014, 10:52 AM   #92
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bump for cx
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Old 03-19-2014, 10:55 PM   #93
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Kent, you wanna be careful about directing questions to a specific member here. That member may not see your post and other members who may have a better answer may be reluctant to respond because of your specific request. Not a good eye-dee, eh?

I've never installed a Durock drain. I have one somewhere for the shower I'm currently building, but I haven't seen it lately.

1. I intend to install mine like I do Kerdi drains.

2. Sorry, don't know what you might be talking about.

I'll be better able to answer after I've installed one, but that might still be a couple weeks off.

My opinion; worth price charged.
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Last edited by cx; 03-20-2014 at 06:26 PM. Reason: typos
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Old 03-19-2014, 11:05 PM   #94
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Thanks cx.

I'm a ways out on my drain install, so you'll probably be able to help me yet.

The blue drain support thingy is used in conjunction with their foam tray...not sure it would be needed or wanted in a mud bed install. But, I think it is included in every box so I thought you might have it handy along with a measuring stick.

Thanks again. Now back to the framing...
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Old 03-20-2014, 06:42 PM   #95
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Yeah, I remember the thingy you're talkin' about now. And from reading their installation instructions I don't think I'd wanna be establishing my foam tray location 'till I had the whole assembly in hand.

Using the foam tray appears to be the same regardless the type of floor you have. I see a note in the instructions for installing when there is no access from below.

I won't set my drain until the walls are tiled and probably grouted (ceiling was grouted today), but for sure I won't do any of the floor work until I have the drain on site. I think it's likely gonna be very similar to setting a Kerdi drain when using mud over SOG, but I have no dimensions for this one as we have inna Liberry for the Kerdi drain. We might need to work on that.
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Old 01-02-2018, 07:25 PM   #96
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USG shower system?

Any particular opinions here about the USG shower system?

I am considering buying the 32x60 foam tray with center drain and pairing it with the USG foam board for the walls of the shower.

Also, any experience with special ordering the USG stuff from Home Depot?

Thanks,
Kent
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Old 01-02-2018, 08:19 PM   #97
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Have you checked the prices on contractors direct? I havent ordered from hd, but I order a lot of stuff from contractors direct.
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Old 01-03-2018, 10:09 AM   #98
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I did check contractors direct. Pricing is about the same as Home Depot. Their shipping seems very reasonable, but I am concerned about damage to the foam board during shipping, which I think would be easier to resolve with HD.

How about experience with the USG system? Any gotchas for a slab on grade basement shower?
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Old 01-05-2018, 12:52 PM   #99
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USG foam tile backerboard deflection requirement

Question: If you have installed 1/2" USG foam backboard for shower wall use, did you follow the USG maximum allowable deflection spec?

Background: In reading the USG installation manual for their foam board, they specify a deflection rating of L/360 for walls.

Walls
1/2" and 5/8" thickness
Maximum stud spacing: 16" o.c.
Maximum allowable deflection,
based on stud properties only,
L/360. Maximum fastener
spacing: 8" o.c. for wood and
steel framing.


A check using the deflecto for 2x4"x8' studs at 16" OC gives a deflection rating of L/126.

For joists that are SYP or Douglas Fir, in good condition, 3.5 inches tall, 1.5 inches wide, 16 inches on center, and 8 feet long between supports, the deflection calculated is 0.760 inches.

This translates to a deflection of L / 126.


Seems like a normal stud wall doesn't meet their spec.

Am I missing something?

Kent


Here's the link to the install guide:

https://www.usg.com/content/dam/USG_...uide-CB766.pdf
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Old 01-05-2018, 01:17 PM   #100
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The (horizontal) design load on a wall is not going to be 40 psf live plus 10 psf dead, which is what the Deflecto uses (more or less). I don't know what horizontal design load should be used, but it will be a lot less. 2x4s @ 16" o.c. for an 8' tall wall is well with industry standards for wall framing for tile, at least as I understand them as a non-professional.

Cheers, Wayne
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Old 01-05-2018, 04:09 PM   #101
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Thanks Wayne. I forgot that the deflecto is for floors and not walls.
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