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Old 03-17-2008, 01:19 PM   #1
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Installing porcelain tile on a sloping floor


My home had an addition built on about 40 years ago. The kitchen was enlarged and a family room added. My kitchen floor is level until the point where the addition starts, then it slopes down, away from the kitchen toward the family room. The kitchen currently has linoleum, and I want to tile the kitchen, using 16"x16" porcelain tile, but how do I address the sloping area? Is self-leveling floor compound going to work, or do I need structural help? The slope is minimal, and stops at the family room, but I don't want cracking or grout-line problems in the future. The area under the house is dirt crawlspace (1958 was when the house was built).

Any help is appreciated!!!!!

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Old 03-17-2008, 02:23 PM   #2
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Installing porcelain tile on a sloping floor


How much variance we talkin' here my friend?

Some plane crashes are considered minimal but they are still plane crashes.

How big is the area?
I assume it is ALL a wood structure?
What size are the floor joists?
What is their spacing?
What is their free-span?
What is the subfloor made of?
How thick is the subfloor?
How many layers of what exists now?

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Old 03-17-2008, 02:32 PM   #3
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Installing porcelain tile on a sloping floor


The variance is about 1/4-3/8 in. per 6ft.

How big is the area? - 6ftx11ft w/ the slope running down the 6ft length.

I assume it is ALL a wood structure? Yes.

What size are the floor joists? Going underneath to check tomorrow.

What is their spacing? Going underneath to check tomorrow.

What is their free-span? Going underneath to check tomorrow.

What is the subfloor made of? Plywood.

How thick is the subfloor? 5/8"

How many layers of what exists now? 2 layers of linoleum.

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Old 03-17-2008, 05:11 PM   #4
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Installing porcelain tile on a sloping floor


FINALLY!!!!!

Somebody on one of these forums with a sense of humor. THANK GOD!
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Old 03-17-2008, 05:26 PM   #5
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Originally Posted by Bud Cline View Post
FINALLY!!!!!

Somebody on one of these forums with a sense of humor. THANK GOD!
Yeah.....I'm known mostly for my witty smile.....but I may be shtty at laying tile.

Did you forget to type in the answer to my question?
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Old 03-17-2008, 05:29 PM   #6
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Installing porcelain tile on a sloping floor


Quote:
Did you forget to type in the answer to my question?
No!
You said TOMORROW! I was waiting until tomorrow.
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Old 03-17-2008, 06:27 PM   #7
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No!
You said TOMORROW! I was waiting until tomorrow.
Ohhhhhh!

I'll post the results of my measurements ASAP.

Thanks in advance!
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Old 03-18-2008, 07:25 PM   #8
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Installing porcelain tile on a sloping floor


Might have to wait until tomorrow, again......I'm under the weather today!
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Old 03-18-2008, 10:17 PM   #9
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OK....now there's going to be a "Trip Charge".
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Old 03-19-2008, 03:23 PM   #10
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Installing porcelain tile on a sloping floor


Still under the weather, Bud. I just realized that I have the blueprints for the addition, that were passed to me from the seller, which were passed to him from the original owner. When I get home tonight (yes, I still work even though I'm sick), I will look at the blueprints for the specs that you need.

On a sidenote - how did this manage to pass inspection? I had two home inspections done, and the seller had his own done, also.
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Old 03-20-2008, 12:48 PM   #11
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Installing porcelain tile on a sloping floor


The blueprints have 4x6 beams spanning the width of 11'6" at 48" on center. The subfloor for the addition, according to the blueprints is 4x8 sheets of 1 1/8" "plyscord". The rest of the house is 2x6 T&G over 4x6 beams with pier footings supporting the spans. I'm not sure if there are piers supporting the addition, or if it is only the 4x6 beams spanning the width, until I can crawl under to look. (I poked my head under, but I can't see into the area of the addition).

Does this info help?
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Old 03-20-2008, 01:37 PM   #12
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Installing porcelain tile on a sloping floor


I may be coming to my own conclusions on this......

The addition seems to have "springy" floors, where the existing structure does not. If the beams are not supported by piers in the 11'6" span under the addition, they very well may be sagging.

If this is the case, installing piers and support beams in the middle of the span should cure this, I think.

I suppose I would have to jack up the beams slightly, then place piers underneath for support.

Any takers?

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