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Old 06-10-2017, 07:05 PM   #1
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Help with edging concrete


I'm going to be pouring some concrete into some 20 inch diameter sonotubes that extend above the ground a couple of feet.

I would like to round off the outside edge at the top of the sonotube so they look nice and are resistant to chipping.

I've tried doing this before with rounded edges and it never seems to work.

Is there a trick or tool for this besides a standard edger? My edger looks like this:
http://www.homedepot.com/p/Marshallt...3-HD/202091765

I've tried tipping it up on an angle but that seems to dip the bottom edge into the concrete and the finish is ugly.
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Old 06-10-2017, 07:36 PM   #2
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Re: Help with edging concrete


Since your edge may not be exposed above the sonotube while it is wet, it may be difficult to use the normal edging tool. You could use a mortar joint strike took or fashion one by cutting a 3/4" piece of PVC or conduit in half lengthwise and running the tip of it around the edge while wet. Otherwise, you could just grind it round after it cures out with an angle grinder.
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Old 06-10-2017, 07:52 PM   #3
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Re: Help with edging concrete


They stamp concrete in unique patterns for driveways or patios. You could make a circle with the bevel around the edge and before the concrete sets you place it on top, inside the tube, and tap down to form your nice edge. You could even get creative with something fancier than a simple rounded edge.

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Old 06-10-2017, 07:56 PM   #4
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Re: Help with edging concrete


The trick is to get the right tool for the job, here's a link.

http://www.lewiscontractorsales.com/...m8qhoCWB3w_wcB
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Old 06-11-2017, 01:15 PM   #5
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Re: Help with edging concrete


Quote:
Originally Posted by Canarywood1 View Post
The trick is to get the right tool for the job, here's a link.

http://www.lewiscontractorsales.com/...m8qhoCWB3w_wcB
Wow.. talk about the right tool for the job!
The only problem I see is that they don't make a 20 inch diameter model.. Should I get the larger one or the smaller one? And why?

My first thought is to get the larger one and just lift it up a bit on one side. Seems to me that a larger radius can always be made smaller by a slight angular adjustment, but a smaller radius can not be made larger.
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Old 06-11-2017, 01:29 PM   #6
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Re: Help with edging concrete


I'm betting that you can fashion something like that on your own, by finding a pie / cake tin just the right size at a garage sale, flea market, second hand store.

And cutting the tin in half, adding a drawer handle, and using that to round over the edges of your piers.


ED
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Old 06-11-2017, 01:29 PM   #7
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Re: Help with edging concrete


Since this is probably the only time you will use I would try a fashion something out of a block of wood and some tin.
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Old 06-11-2017, 02:52 PM   #8
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Re: Help with edging concrete


Quote:
Originally Posted by de-nagorg View Post
I'm betting that you can fashion something like that on your own, by finding a pie / cake tin just the right size at a garage sale, flea market, second hand store.

And cutting the tin in half, adding a drawer handle, and using that to round over the edges of your piers.


ED
And if you find a 20" pizza pan.... you'll have your radious right on...
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Old 06-13-2017, 12:05 AM   #9
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Re: Help with edging concrete


Hey please check video.........

Hope it would be helpful to you.

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Old 06-13-2017, 01:41 PM   #10
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Re: Help with edging concrete


I'd change my pier/sonotube to 18 or 24 inch, and buy the tool that is made for the job.
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Old 06-13-2017, 05:57 PM   #11
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Re: Help with edging concrete


The edger that the OP linked to is a POS, which is likely why they've never had any success using it. You need something wider, and preferably short in length for a tight radius. We have a wide array of different edgers, I'd likely use a 6"x 2" edger for 20" sono tubes. Plan on edging it 2-3 times to get it looking the best, and don't try to edge it too early, as you'll just displace a lot of the stones.

http://www.bontool.com/product1.asp?P=RADIUSEDGER
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