Core drill bit and the curb out front...

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Old 08-03-20, 03:57 PM
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Core drill bit and the curb out front...

I am working my way through my first French Drain install and am almost ready to drill the curb for the outlet.

Should I drill from the backside of the curbing (where the fill-dirt and sod is placed), or start at the front-side that is seen from the street?

Next, any wisdom offered on drilling concrete will be appreciated.

Thanks in advance,
Rick
 
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Old 08-03-20, 04:35 PM
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First, make sure you are permitted to alter the curb. Also insure that you are permitted to discharge groundwater to/through the curb.

How large a hole do you need to drill?
 
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Old 08-03-20, 07:38 PM
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Thanks. The answer to both (implied) questions is yes. I already have a permit from the city to alter the curb, and the groundwater will be the same stuff that would otherwise take days to drift out of my yard to the same gutter. No problem on either count.

I need to drill a hole that will allow the end of a piece of 2 inch, sch 40 PVC to be inserted in it.

 
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Old 08-03-20, 07:42 PM
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2" sch40 outside diameter is just under 2-1/2".
A 2-1/2" hole would be ok or one size larger.

Depending on the drill and the angle dictates which side to core from.
 
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Old 08-04-20, 01:34 PM
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Unless you have a drill that can handle horizontal boring you might be better off using traditional hammer drills. You mark the size and where you want the hole. Then you drill a series of holes around the perimeter and knock out the center. With this method you can approach the hole from both sides which could make it easier. How pretty the hole is will depend on the skill and care of your work.
 
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