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Old 03-04-2012, 11:52 AM   #16
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Plywood knotholes


I obviously agree that the thin set will fill the small voids. They are small right? I can't imagine your lumber yard not having "underlayment" grade plywood. That would be like a grocery store not carrying milk. But it's not the end of the world, you'll be fine.

I had missed that your framing is on 4' oc, you didn't mention that before. That is a very common way to built on the left coast, it does not meet any written tile standards that I know of, but it does work if the subfloor is stiff enough. Be sure the 2x6 are in excellent condition. If they are not cupped 1/2" ply should be enough.

Jet said,

Quote:
They wouldn't make tile glue if it doesn't work.
Mastic obviously will bond tiles to most surfaces. It's the performance under wet conditions that is not good. If it gets wet, mastic is likely to return back to mush like when it was in the bucket.

Also, what is the motive of calling their pre-mixed mastic 'Pre-mixed Thin Set Mortar". By definition it can't be "thin-set mortar" unless it's made with Portland cement. Why do they do that?

The best part, you get an inferior product but pay 3-5 times more.

Jaz

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Old 03-04-2012, 12:24 PM   #17
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Yeah, I live in Oregon.I replaced almost all the 2x6 t+g.
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Old 03-04-2012, 01:36 PM   #18
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I took a bunch of picts
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Old 03-04-2012, 01:47 PM   #19
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Ran into more work than i expected.
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Old 03-04-2012, 06:53 PM   #20
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Ran into more work than i expected.
What on earth leaked?!
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Old 03-04-2012, 10:12 PM   #21
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It looks like water was somehow leaking down from the top of the vanity that was against the wall. The rot and stains were in the shape of a pyramid, starting at the edge of the counter and going down to the floor from either side. It must have been maybe overflowing from the sink?? It was from before I got the house.
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Old 03-21-2012, 04:33 PM   #22
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Which is the best type of thinset to use between the pw and 1/4 cbu?

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Old 03-21-2012, 06:34 PM   #23
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The floor is in an L shape being 8.5' x4', and 3x3.5. The Hardie backer I have is 3x5'. This will mean cutting some smaller pices of cbu. Is there any minimum size to keep in mind. I know the bigger and less seams the better.
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Old 03-21-2012, 08:45 PM   #24
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You can use any thin set for under the Hardie, but since it's a small area I would just buy a modified mortar since you'll have to use that type to set the tiles. One bag might do for both steps. Do we know what type of tiles you'll be installing?

Why do you think some of the Hardie pieces will be small? Looks to me like the smallest you'll have is a 2'x4'.

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Old 03-21-2012, 09:58 PM   #25
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Not sure on the tiles yet, but as far as size goes, I was at first thinking of 12", but now I am thinking of wanting to go smaller, maybe 8 or 10, if they have them. Any pros or cons as far as size?
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Old 03-21-2012, 10:04 PM   #26
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Get the size you like best. Take a box of a few sizes home and see what hits you.

You're not gonna find many 8" and even less 10" these days.

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Old 03-21-2012, 10:09 PM   #27
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Yeah, it looks like 2.5 x 4, would be the smallest. The rest would be two at 3x4, and one at 3x3.5,looking at it on paper.(minus the 1/8" gaps between panels and walls/tub.
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Old 03-21-2012, 10:35 PM   #28
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Yes, 2.5'x4', that's what I meant.

In a pinch you can install small pieces like 6"x6" or smaller. Actually the seams are stronger than the rest.

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Old 03-21-2012, 10:45 PM   #29
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Thanks for the info. To jump ahead, I was also planning on using Hardie 500, with #15 felt behind it ,on the walls of a tub/shower surround.Does this sound like the way to go, or would you recommend something else?
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Old 03-21-2012, 11:08 PM   #30
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Thanks for the info. To jump ahead, I was also planning on using Hardie 500, with #15 felt behind it ,on the walls of a tub/shower surround.Does this sound like the way to go, or would you recommend something else?
If the paper is installed right that is good enough. Most prefer to use 6 mil plastic instead as the vapor retarder. I'd rather apply a waterproofing membrane on the surface of the backer instead. That way nothing gets wet.

Look at Redgard or HydroBan. Apply two nice coats totaling about 60-70 mils wet for Redgard, less is required for HydroBan. Use a wet film gauge. If you wanted to go even better, or if this was a shower stall, I'd recommend the Kerdi system.

Jaz

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