I need to drill one (4") hole through my poured concrete foundation wall (8"), and two holes through my (4") slab. I plan to use an electric hammer drill w/ 1/2 inch bit, drilling holes then chiseling out. Does this sound like a good approach? Would perhaps a drill powered by an air compressor be more effective? Thanks.
This should work as long as you have a fairly decent hammer drill. I have discovered that it is best to use a smaller bit such as a 1/4" or 5/6" They seam to drill faster than a larger bit. Also, when you purchase your masonry bits make sure they are percussion bits.
It would probably be best to spend a few bucks to rent a heavy duty rotary hammer drill. Would drill much faster and hold up better.
Drilling holes in concrete slab
Drilling into New Concrete
Attaching concrete walkway to foundation with rebar
destroying concrete block
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