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Old 11-03-2006, 09:55 AM   #16
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does the floor really need to be level before laying tiles?


now I have no reason to acquire another toy.... I suppose you are talking about an adaptor type of bit.... thanks...

to reread your post, I think you meant to buy another paddle bit, well I think that heavy metal thing is quite expensive, reason I have one is I got a complete tapping set tools from someone which including this guy... for $50 bucks... now... I better visit home depot see if they have adaptor to convert 3/8 to 1/2 for the 1/2 bit...


Last edited by KUIPORNG; 11-03-2006 at 10:05 AM.
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Old 11-03-2006, 11:06 AM   #17
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does the floor really need to be level before laying tiles?


The only reason I said to use a 1/2" drill is because, usually, a 3/8" drill has a harder time turning heavy cement/motar type products. I burnt out my craftsman 3/8" mixing thinset.....I bought a dewalt 1/2" spade handle drill because I do alot of tiling....plows through thinset like nothing...
If you have a powerful 3/8" drill you may be fine.
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Last edited by dougrus; 11-03-2006 at 11:08 AM.
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Old 11-03-2006, 11:09 AM   #18
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does the floor really need to be level before laying tiles?


now I have a reason to accquire the toy...

what about the questions regarding the lengh of the "on-rock" screws, is it suppose to screw onto the plywood through the thinset only? the thickness of my plywood may be only .25 inches,,,I am not quite sure, may be .5 inches... but it is the regular one selling at HD...
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Old 11-03-2006, 11:16 AM   #19
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does the floor really need to be level before laying tiles?


Well, if I understand your situation correctly, there are joists and then the subfloor so there wouldnt be danger of going into the concrete with screws and therefore, whatever is the standard size screw at HD should be fine. You are securing the backerboard TO the plywood with the the screws and thinset...yes the screws will be going through the thinset and through the plywood.
By the way, it is important that you know the thickness of the plywood because it needs to rated for subfloor use...if you used 1/4 and that is the only layer that is a BIG problem. It is probably 1/2" which is a little undersized as well. You should be using 3/4 T&G ply.
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Last edited by dougrus; 11-03-2006 at 11:19 AM.
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Old 11-03-2006, 11:19 AM   #20
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does the floor really need to be level before laying tiles?


there is no joists, only concrete, plastic sheet, plywood...

that is why I thought of tapcon in my earlier message...
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Old 11-03-2006, 11:33 AM   #21
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does the floor really need to be level before laying tiles?


Quote:
Originally Posted by dougrus View Post
but from what I gather you are saying that there are joists there and that the plywood is secured to the joists....r...
In my previous post I verified that ther were joists so I assumed that is the way it was constructed...

I have never secured a floor this way, attaching hardibacker to plywood that is SCREWED into concrete, so Im not sure how to tell you to proceed...I guess you could measure and try to get the exact thickness and then get an appropriate screw. ANyone else have a suggestion here?

If it were me, I would rip out the plywood, thinset Ditra to the concrete and then thinset then tile...Just becuase having plywood on a basement floor you are asking for trouble...especailly THIN plywood...Moisture finds its way up through the slab probably through the barrier and into the wood...The thiner it is the more it will swell in temperature and varying mositure levels...The swelling will cause the floor to move up and down, the grout may crack and the tile as well...Maybe not tomorrow maybe not next week but eventually you may have a problem...Just trying to save you work in the long run.
Not trying to be a pain I just dont want to see you go through all this and then have to redo eventually.
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Old 11-03-2006, 11:38 AM   #22
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does the floor really need to be level before laying tiles?


Wait if you are going to keep the plywood down, this is what you should do....
Go get Ditra.
Thinset the Ditra to the plywood.
Thinset the tile onto the Dirta.
The Ditra will act as an isolation membrane.
It is a little more costly then cement backerboard but I would do it in this situation.
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Old 11-03-2006, 11:40 AM   #23
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does the floor really need to be level before laying tiles?


Thanks a lot Dougrus, I have thought about doing what you said also... but I am quite confident my basement floor is very dry.... and you are right, I don't want to going through the pain to rip off the pine wood, not only it takes considerable amount of work, it also means I spent money for nothing... after weighting both sides , I think I will just leave the way it is...

what is wrong with tapconing the backer board onto the concrete then, I will drill hole on the backer borad before screwing for sure...
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Old 11-03-2006, 11:43 AM   #24
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does the floor really need to be level before laying tiles?


Oh yes, I saw those thing in HD before... Thanks.... I will read more about it...
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Old 11-03-2006, 11:44 AM   #25
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does the floor really need to be level before laying tiles?


See the recent post above...I think that is best route if you are keeping the plywood. The Ditra...
But if you definetly are going to do the backerboard I guess you could screw all the way into the concrete...
I dont have any specific reason for not doing this, it just doesnt sit well with me...I guess it will be ok.
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Old 11-03-2006, 11:45 AM   #26
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does the floor really need to be level before laying tiles?


Quote:
Originally Posted by KUI****G View Post
Oh yes, I saw those thing in HD before... Thanks.... I will read more about it...

This is NOT a fad type material...Pros are using this alot now....
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Old 11-03-2006, 04:27 PM   #27
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does the floor really need to be level before laying tiles?


Why not just put a mud floor ontop of the plywood?
Probably about the same price as backerboard and you can level the room.
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Old 11-03-2006, 04:37 PM   #28
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does the floor really need to be level before laying tiles?


leveling mud is actually much more expensive then backer board if I remember correctly... anyone know how much it cost for 70 sq. ft x 0.25 inch approx ... I think it would be a few hundred dollars...
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Old 11-03-2006, 05:05 PM   #29
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does the floor really need to be level before laying tiles?


Kuip,

Here is the Ditra link...

http://www.schluter.com/english/prod...601-index.html
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Old 11-04-2006, 12:56 AM   #30
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does the floor really need to be level before laying tiles?


Quote:
Originally Posted by KUI****G View Post
leveling mud is actually much more expensive then backer board if I remember correctly... anyone know how much it cost for 70 sq. ft x 0.25 inch approx ... I think it would be a few hundred dollars...
Don't use the self leveling stuff. Get yourself float and a decent level.

Tar paper - $15 (if you can't dig it up free somewhere)
Mesh $14
Bag of cement $12
Sand $6

That will get you about a half inch mud floor. With the mud floor you can pitch it to the middle and install a drain if you like as well. That way should you have any sort of flood in that room your basement stays dry.

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