The guys at home depot had a lot of fun lamenting the fact that the hole existed to begin with and then suggested that i build a mold on one side of the wall and fill it in with a pour of concrete.
Making hole in concrete wall.
Sorry i just re read your post.
Once you are done with the drilling it will remove the large center piece to leave you with a large hole.
Remove any concrete dust then press the anchor into the hole until it is flush with the surface.
Here s a few pictures of the right tool.
Drill through each corner of your cutout using a rotary hammer equipped with a masonry bit.
If necessary tap.
These holes will mark the boundaries of the opening and help guide your cuts.
The hole should be slightly smaller than the maximum width of the.
After hearing that i seriously considered just gluing a piece of plywood over it and calling it a day.
I ve hammer drilled through concrete to sink anchors but a 4 inch diameter hole is a little intimidating until you have the right tool.
Easiest way is to call diamond drilling or a similar company and have them come out and drill all your holes for a few hundred dollars.
Menards and other places rent core drills for large holes in concrete.
Expand the drill hole to accommodate the anchor.
A core drill is simply a drill bit used for making the large holes in concrete and masonry materials.
You will find most core drill bits coming in different sizes such as 2 inches or 4 inches.
The size depends on the application.
The walls at our new place are 6 inch thick concrete it s an old naval base and we needed a few holes for vents.