How To Drill A 4 Inch Hole In Concrete Wall

Thicker points are reinforced with re bar.

How to drill a 4 inch hole in concrete wall.

Next turn on the drill s hammer function and start drilling applying firm but not forceful pressure. Once you have the right drill and drill bit mark the spot on the concrete you want to drill through. The wall is made with stay in place forms so the actual concrete forms a kind of waffle pattern which i think is about 4 thick at its thinnest point. A standard drill bit is not large enough to make such a hole.

We will discuss the process later in this. Drill the guide hole to a depth of 1 8 to inch. Then drill a shallow pilot hole using a low speed or short bursts. As much as you will be using the core drill a standard drill is still required in the initial stages to make the guide hole before you can fully switch to a core drill.

When you have to drill large holes into concrete such as the 2 inch or 4 inch holes you will need to use a core drill. Step 4 when you start with a guide hole at least 1 8 inch deep your drill will be easier to control but all the same continue to operate the drill with a steady light but firm touch so you re. I need to drill a 4 hole in the foundation of our house to vent a bath fan in the basement. Stop the drill sweep or blow away the accumulated concrete dust and pull out the drill.

To drill into concrete use a hammer drill with a carbide tipped masonry bit. Do not force the drill. Drill forward with steady light pressure.