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Old 06-11-2014, 11:31 PM   #1
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SubFloor Prep and Ceramic Tile Installation


Hi,

Thanks for a very informative forum. I am about to install my tile (ceramic or porcelain) in my powder room and kitchen.

Our home was built in 1999 (about 15 years old); we are located in Cherry Hill, NJ. And we just bought the house about a month ago, so I hope to finish the job before we move in around the end of June.

I ripped off the linoleum / vinyl on the existing plywood subfloor. But as the pictures below show, the vinyl left some sticky residue on the floor, and I am not sure how to remove it. So my first question is what can I use to remove the sticky vinyl residue? Is it advisable to use vinyl adhesive removers? How clean does it have to be - until I see most of the grain of the naked/bare plywood?

I plan to install some 1/4 inch hardi-boards on the subfloor before installing the tiles. Do need to beef up the SubFloor with a luan before installing the hardi-boards?

I've included some pictures of the current floor, including the joists, taken from the basement ceiling for your review.

I appreciate your thoughts and suggestions.

Thanks very much - Oyiwaa
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Old 06-11-2014, 11:40 PM   #2
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Before you gorge yourself with a lot of useless and wrong information from the Internet...listen up.

There is no need to remove the glue if you are going to cover the floor with Hardibacker anyway so get that out of your head.

The Hardibacker MUST be installed in a fresh bed of thinset also.

Forget about the luaun thing. Have no idea where you got that nonsense but luaun is the absolute worst thing you could use anywhere in a tile installation. Luaun has never "beefed up" anything but a bond fire.

You should also know that Porcelain tile IS ceramic tile.

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Old 06-11-2014, 11:44 PM   #3
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Those structural members are not floor joists, they are floor trusses. There is a difference.

Next thing we need to know is the measurement/length of the unsupported floor trusses.

What is their spacing?

How thick is the subfloor material that is there and is there only one sheet of subfloor?

Is the subfloor tongue and groove material.

Let's go...we can have this over with in about thirty minutes.
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Old 06-11-2014, 11:50 PM   #4
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Luan is not a suitable underlayment for any flooring.
No 1/4 wood underlayment should ever be used under tile.
What's the spacing on those truss floor joist?
How thick is the subflooring?
If there spaced 24" or more apart and there's only 1 layer of 3/4 plywood as a subfloor then your looking at having to add a layer of 1/2" A/C plywood over it making sure to not have the seams line up with the seams below.
Doing this is going to require you to remove the lower cabinets. If not your not going to be able slid in the dish washer.
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Old 06-11-2014, 11:52 PM   #5
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Sorry to repeat your comments Bud, my space bars messing me up and slowing me down.
LOL
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Old 06-12-2014, 12:06 AM   #6
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Thanks for your prompt response .... and I've learnt a lot already -- goodbye luaun.
Now ... to your questions:

-- As far as I can tell, there is only one subfloor - the plywood. The vinyls were glued directly onto them (with some sort of whitish underlayment).

Secondly, how do I do those measurements:

-- length of unsupported trusses
-- spacing of unsupported trusses

Thanks - Oyiwaa
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Old 06-12-2014, 12:06 AM   #7
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Quote:
Thanks for a very informative forum.
Ah..... I'll bet you say that on all the forums you've posted this Q.

You've received great info here, please answer the questions you've been asked.

Jaz
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Old 06-12-2014, 12:14 AM   #8
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Quote:
Originally Posted by Oyiwaa View Post
Thanks for your prompt response .... and I've learnt a lot already -- goodbye luaun.
Now ... to your questions:

-- As far as I can tell, there is only one subfloor - the plywood. The vinyls were glued directly onto them (with some sort of whitish underlayment).

Secondly, how do I do those measurements:

-- length of unsupported trusses
-- spacing of unsupported trusses

Thanks - Oyiwaa
Your trusses rest on a wall at one end as seen in the picture. How far does that truss go before it rest on something? It could be a beam, it could be another wall.

What is the measurement between the trusses?

Forget the whitish stuff, it means nothing. It is probably the felt from the back of the previous floor covering. Is it sorta fuzzy?
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Old 06-12-2014, 12:15 AM   #9
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Originally Posted by joecaption View Post
Sorry to repeat your comments Bud, my space bars messing me up and slowing me down.
LOL
Not a problem - two heads are always better than one. (Usually)
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Old 06-12-2014, 12:17 AM   #10
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Oyiwaa,

We are going to first determine if what you have to work with is suitable for a tile installation. I can tell you it probably is not in its current state. Let's get the measurements and we'll know more then. It is all do-able tho.
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Old 06-12-2014, 12:20 AM   #11
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Haaa ... it is a small world, indeed !!.

Thanks - I will take note of all the help here too ...

cheers, Oyiwaa

Quote:
Originally Posted by JazMan View Post
Ah..... I'll bet you say that on all the forums you've posted this Q.

You've received great info here, please answer the questions you've been asked.

Jaz
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Old 06-12-2014, 12:23 AM   #12
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Originally Posted by Oyiwaa View Post
Haaa ... it is a small world, indeed !!.

Thanks - I will take note of all the help here too ...

cheers, Oyiwaa
You will be less confused if you zero-in on one forum and work with them instead of loading up on a bunch of information you may never sift through.
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Old 06-12-2014, 12:30 AM   #13
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Ok .. I will stick by here.
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Old 06-12-2014, 12:41 AM   #14
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One more question -- am I measuring the trusses under the specific floor I plan to work (i.e, trusses supporting bathroom floor, separately from those supporting kitchen floor)?

cheers, Oy
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Old 06-12-2014, 12:51 AM   #15
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Originally Posted by Oyiwaa View Post
One more question -- am I measuring the trusses under the specific floor I plan to work (i.e, trusses supporting bathroom floor, separately from those supporting kitchen floor)?
cheers, Oy
They should all be the same basic measurements throughout the house. If they aren't we can discuss it.

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