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Old 09-07-2008, 07:58 PM   #1
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removing stubborn tar paper


I am in the process of removing old flooring to install new porcelain and am finally down to the tar paper and it is really stuck to the floor. I have tried to use a heat gun and it does work very slowly but still leaves a residue. I am going to thinset and screw denshield to the floor, so do i need to completely remove the tar paper, and if so is there an easier way.

thanks in advance,

Kurt
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Old 09-07-2008, 09:04 PM   #2
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removing stubborn tar paper


You do not have to remove everything with this method of installation. I would like to know more though.

Type of room.
Size of room
Size of your porcelain tiles
Type, size spacing of joists. The unsupported span of the joists
Type, thickness of the subfloor, any underlayment?
What was on the floor before

Jaz
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Old 09-08-2008, 08:02 PM   #3
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removing stubborn tar paper


first of all the room is a kitchen
it is approx. 180sq.ft.
tiles are 13"x13"
floor joists are on 16" centers and are 2"x9", then there is 1x10 above the joists, and 3/4" plywood above that.
What i removed so far is carpet, linoleum, and a veneer layer, and last of all is the tar paper.
thanks for the reply,
burtnboo
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Old 09-08-2008, 08:12 PM   #4
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removing stubborn tar paper


OK, so, it's a kitchen, 180 sq. ft., 13" porcelain tiles. Your joists are 2x10, (1.5x9.25), at 16" o.c. how about the unsupported span? That's the most important part.

You're saying you have 1x10 plank subfloor? Wow, that's kinda unusual. Are they perpendicular or on a diagonal to the joists? The 3/4" plywood over that. Is the tar paper just tarpaper? I mean no decorative design on the top of it? Is it glued at all? What was this 'veneer' you removed?

Jaz
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Old 09-08-2008, 08:22 PM   #5
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removing stubborn tar paper


the unsupported span is 14-3/4"
the planks are on the diagonal above the joists
i'm not sure if the tar paper is glued or not. In places it sure seems so, and it is not decorative.
I'm not sure what the veneer layer is but has a wood grain look and very pliable.

thanks,
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Old 09-08-2008, 10:13 PM   #6
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removing stubborn tar paper


Must be my fault for not asking the right way?

That is not the unsupported span of the joists. That is a space between one joist and the next. When the joists are 16" oc, it is actually 14.5 ".

I want to know the span of the joists. The 'span' is the length from one support to the other support. This is what holds the joists up in place. Kinda like a suspension bridge?

The distance from here l-------------------------l to here is the span. Like 12' 8" or whatever?

Jaz
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Old 09-09-2008, 08:57 PM   #7
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removing stubborn tar paper


the longest joist span is approx. 10 ft.

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Old 09-09-2008, 09:26 PM   #8
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removing stubborn tar paper


OK, good. Your floor joists system should be plenty stiff for this install.

Jaz
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Old 09-10-2008, 06:43 PM   #9
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removing stubborn tar paper


do you think i need to get all of the tar paper off the floor before i start the install? or can i thin set over the top of it

thanks,
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Old 09-10-2008, 07:21 PM   #10
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removing stubborn tar paper


Remove anything that is loose, that's it. Sounds like you know how to install the CBU, so get going all ready.

Jaz
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Old 09-10-2008, 07:44 PM   #11
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removing stubborn tar paper


thank you for all of your patience and input.

burtnboo
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