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Old 06-19-2017, 09:45 PM   #1
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Rough cement


I want to tile an enclosed porch floor that's concrete. It was once a smooth small slab porch. We had it expanded and enclosed. When slab was expanded, the new portions were left pretty rough, as if they were gone over with a 2x4, but never smooth out. So the rough portions run the length and are about 3 x 20 long, and down one side, about 3x12. Question is, how do I smooth out rough concrete sections so,tile,lays flat? Thanks all.
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Old 06-19-2017, 11:02 PM   #2
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Re: Rough cement


How rough is rough? Is it a broom finish or are there ridges 1/8" or higher, etc?
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Old 06-20-2017, 07:50 AM   #3
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Re: Rough cement


Broom finish would be wonderful. We are talking about multiple ridges that are at least 1/8". Its like they poured the cement into a mold, then used a 2x4 in a sawing motion to push it into place. Never went over it with a broom so smooth out ridges. Not sure it this is something I can grind out, but that would take a large unit, too much for hand held machine.
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Old 06-20-2017, 08:14 AM   #4
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Re: Rough cement


Put up a few pictures so the tiling experts around here will have a better idea of what you are dealing with.
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Old 06-20-2017, 10:48 AM   #5
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Re: Rough cement


How were you planning on adhering tiles to the concrete?
Adhesive or cement base?
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Old 06-20-2017, 07:55 PM   #6
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Re: Rough cement


Hope this works
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Rough cement-image.jpg  
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Old 06-20-2017, 07:58 PM   #7
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Re: Rough cement


Was planning on Ditra underpayment, thin set and stone or porcelain tiles.
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Old 06-20-2017, 08:08 PM   #8
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Re: Rough cement


This might helpName:  rough concrete.jpg
Views: 69
Size:  67.7 KB
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Old 06-20-2017, 08:52 PM   #9
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Re: Rough cement


Looks like it was struck off and they walked away from it.
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Old 06-21-2017, 08:01 PM   #10
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Re: Rough cement


7" grinder w/12 seg turbo diamond cup wheel,,, rent the grinder that has a dust shield & buy some knee pads,,, shouldn't take over 1 hr from what i can see if you're using tile
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Old 06-21-2017, 09:37 PM   #11
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Re: Rough cement


Quote:
Originally Posted by stadry View Post
7" grinder w/12 seg turbo diamond cup wheel,,, rent the grinder that has a dust shield & buy some knee pads,,, shouldn't take over 1 hr from what i can see if you're using tile
Agree...but even with the dust shield I am wearing goggles and a dust mask with plenty of ventilation.....else you won't be able to see what you're doing after ten minutes!
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Old 06-21-2017, 10:01 PM   #12
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Keep it wet to keep the dust down
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Old 06-22-2017, 04:29 AM   #13
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Re: Rough cement


we don't have much luck w/hand grinders wet ,,, walk-behinds, yes,,, but that's a diff vac system,,, unlikely avg diy'er will have access to big vacs & grinders,,, 'sides, there's always a budget

not wearing masks much anymore as new vacs are doing a good job

Last edited by stadry; 06-22-2017 at 04:32 AM.
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