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Old 12-09-2013, 12:54 PM   #1
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Cutting Granite


I have an L shaped kitchen and would like budget granite.
I found 8' prefab slabs that will work, I just need to make a miter cut, and a sink cutout.
I have done enough tilework to know this will be a challenge.
I think I can get the sink cut fine as long as I dont do undermount.
Has anyone had success in making a granite miter joint look ok without prior experience/proper tools.
I was planning on using a saw guide and diamond blade in a circ saw while someone sprays with a spray bottle of water.
Granite shop quoted over 2k.
Stone for this project would cost me $400

Don't need a flawless unnoticeable seam, just cant be horrible either.


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Old 12-09-2013, 06:13 PM   #2
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Cutting Granite


think you're right - the sink cutout's the easy part,,, don't know how anyone could succeed w/o SOME experience & proper tools - even picking the right diamond blade is tricky - need to have correct rpm's ( surface feet per minute ), diamond shape/size/concentration, + the correct segment design,,, i suppose you could make a jig,,, its EXTREMELY important the water be applied at the right location as it does 2 things: 1, it keeps the blade cool; & 2, it flushes the swarf out of the cut

or you can just say f it - there's always jb weld good luck !

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Old 12-09-2013, 07:03 PM   #3
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Cutting Granite


Your on the right track with the saw guide,but you'll need a lot more water than a spray bottle,figure on a hose to keep the blade cool and flush the swarf as IRC said,and the best blade to use would be a turbo with dampers on both sides of the blade,to lessen vibration of the blade,one like this.

http://www.homedepot.com/p/RIDGID-7-...6#.UqZmgE4o6po
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Old 12-09-2013, 07:05 PM   #4
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Cutting Granite


Ha Jb weld.
I was planning on mixing the granite dust with clear epoxy to fix my issues.
I will probably beg granite shops to do the cutting, but i doubt they will.
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Old 12-09-2013, 08:07 PM   #5
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Cutting Granite


You DON'T want to do a miter cut.


A simple straight cut IS the way to go.

Make it nice and straight, level the pieces, then epoxy together (tint the epoxy. NOT with granite dust).
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Old 12-09-2013, 09:13 PM   #6
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Cutting Granite


If my granite was a small radius or square edge, i wouldn't do a miter. There's no way to just do a 90deg butt joint when there's an oagee edge treatment.
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Old 12-10-2013, 07:14 AM   #7
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precision granite cutting depends on blade stability, rpm's, water in the right spot, diamond concentration/shape/size, & segment matrix,,, the ' aris ' often chips due to any of them not being correct,,, cutting pro's will even change blades depending on the granite itself as often 1 cuts differently than otghers.

we used akemi & granite dust for reprs

' ogee '
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Old 12-10-2013, 09:18 AM   #8
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Cutting Granite


I have never seen the joints done with granite dust. But it that's your thing, what the hey.


I understand about the OP's thoughts on doing a miter cut, since he has the pre-fab blanks. Good luck getting it just right. Wall run out can be a real b.....
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Old 12-10-2013, 10:21 AM   #9
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ooops, showing some age yep, today's installers use non-sag epoxies of various approx granite colors,,, the couple chips we found were reinforced/fill'd/extend'd w/granite dust to minimize repair shrinkage,,, it was something i had to show them otoh, they also had a vacuum thingie to draw both pieces together resulting in a much finer jnt we never had that !
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Old 02-09-2014, 09:23 AM   #10
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I am considering doing my own pre fab granite counters and would like to know how your project went?

This is how I see inside corners cut on granite. I suspect a long 45 would be difficult and fragile. Jim
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Old 02-09-2014, 10:05 AM   #11
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both our corner's abut @ 90* as straight cuts,,, angle cutting introduces ' short-cutting ' because of blade circumference ( the top of the material's cut to your reference point BUT the bottom of the cut hasn't yet been completed,,, you'd need a vertical blade to properly due that finish cut,,, possibly 1 could eliminate short-cutting by over-cutting but i wouldn't / didn't
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Old 02-09-2014, 10:07 AM   #12
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Cutting Granite


I'm the ultimate DIY'r....but that is one area that I would not do....

One mistake and that budget slab is now a budget couple pieces of rock.

If the professional makes a mistake....he replaces it.

How confident are you?
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Old 02-09-2014, 03:30 PM   #13
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Totally confident, darn the torpedoes, full speed ahead.

I have destroyed much more expensive material

Remember this is a DIY site, not a you better not try that you will only screw it up site! JIm
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Old 02-10-2014, 09:05 AM   #14
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Project update: I went with laminate. If only my source for $13/sq ft granite didn't have an ogee edge. . . .

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