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How To Drill Into Concrete

Updated
Drilling concrete? That’s no problem with these tips.

There was a time when concrete was used exclusively for heavy-duty industrial work such as constructing factories and laying driveways. However, concrete’s extreme strength and tactile nature have made it increasingly popular with builders and architects.

Today, you can see concrete being used in high-end apartments to achieve a bold minimalist look. If you decide to use it for your own project, you will have chosen a material that is extremely strong. The only drawback of this toughness is that you might find it difficult to make modifications later.

Thankfully, drilling into concrete is not as daunting a task as it might seem. In this guide, we will explain how to drill into concrete, including which tools you need and the technique you should use.

How to Drill Into Concrete

Drilling into concrete requires using an appropriate drill, specifically a hammer drill with a tungsten carbide bit. Mark the spot where you want to drill, then drill a shallow pilot hole. Use the drill in short bursts at a slow speed for greater control.


Can You Use a Regular Drill to Drill Into Concrete?

There are different types of concrete, with varying levels of hardness. You might be able to use your usual drill to make holes in it but this will depend on the type of concrete you are working with.

For decorative concrete such as internal walls, which are usually softer, it might be possible to use a rotary hand drill and a masonry drill bit. If you do, it is important to take it slow to avoid burning out the motor or damaging the drill bit.

Can I Drill Into Concrete Without a Hammer Drill?

If you want to drill into concrete effectively and without damaging your equipment, you will need a hammer drill. Older concrete is denser and tougher. It was created for strength, not to be a part of interior design.

Hammer drills use a rapid hammer action to drive the drill bit through the material, allowing them to penetrate harder surfaces than a standard rotary drill.

Top Tip

When searching for a suitable hammer drill, look for one with adjustable speed settings and a stop function. You will also want a secondary handle to improve your grip and increase your control. These drills are longer than standard ones and have a handle at the front that makes them resemble a rifle.

What You Need

  • Pencil
  • Ruler
  • Hammer drill
  • Masking tape
  • Goggles
  • Tungsten carbide masonry drill bit
  • Masonry nail (3 inches or longer)
  • Hammer
  • A can of compressed air
  • Vacuum

How To Drill Into Concrete

1. Mark the Surface

Use your pencil to mark the spot where you want the hole. Consider how deep you want the hole to be and use a stop bar to set the desired depth of your drill. If you don’t have a stop bar, wrap some masking tape around the drill bit to avoid drilling deeper than you plan to go.

2. Prepare the Drill

Insert an appropriately-sized tungsten carbide masonry drill bit into your hammer drill. Make sure it is tightly locked so it won’t slip while drilling. Put your goggles on before proceeding.

3. Get Into Position

Plant your feet shoulder-width apart and hold the drill tightly. If you have a secondary handle, hold it with your other hand for greater control. If you don’t have two handles, grip the drill’s handle with both hands.

When you move in to make the hole, the tungsten carbide drill bit should be perpendicular to the concrete. There will likely be some kickback caused by the hammering action, so brace yourself.

4. Drill a Guide Hole

Set the drill on a slow setting and make a guide hole. If your hammer drill only has one speed, operate it in short bursts until your guide hole is about a quarter-inch deep.

5. Keep Drilling

Maintain a firm grip but don’t push too hard. This will allow you to respond to any pockets of stone or other hard materials within the concrete. It is easy to lose control of your drill when drilling through a material as tough as concrete.

As you have already made a guide hole, your drill should be easier to control. You can gradually increase the speed of your drill as it moves deeper until the hole is complete.

6. Overcoming Obstructions

When you hit an obstruction, it can be tempting to force the drill through it but you must avoid doing this. Hard obstructions can damage your drill bit and the drill itself. It can also make your drill veer off course, potentially damaging the surrounding area.

Instead of pushing on, remove the drill from the hole. Then, you can insert a masonry nail so it touches the hard spot. Give the nail a few sharp taps with a hammer. Don’t hit it too hard, as you might lose control of the nail and cause further problems.

This should damage the obstruction enough to allow you to drill through it. Remove the nail and slowly start drilling again until you are past the blockage.

7. Clear the Debris as You Go

Every 15 to 20 seconds, withdraw the drill bit and remove any debris from the hole. This will allow the drill bit to cut into the hard concrete without also needing to grind through concrete dust.

8. Attach Anchors

Once your stop bar or masking tape on the drill bit shows that the hole has reached your desired depth, remove the drill. While still wearing your safety goggles, use your can of compressed air to blast the dust from the hole.

Use a vacuum cleaner to clean up any debris that falls on the floor. Then, insert your anchors into the hole, tapping them with a hammer until they are flush with the surface.

9. Repeat

Repeat this process for any other holes you require.

How Soon to Drill Into New Concrete

New concrete needs to be allowed to set for at least three days before you should consider drilling into it. Concrete takes between five and seven days to reach 60% of its final strength. For this reason, you should leave it for seven days if you want to attach anchors. This is because some expanding anchors place a lot of pressure on the surrounding material.


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About the Author

Mark Weir

Mark spent 24 years working in real estate, so he knows his way around a home. He also worked with contractors and experts, advising them on issues of planning, investments, and renovations. Mark is no stranger to hands-on experience, having renovated his own home and many properties for resale. He likes nothing better than seeing a project through to completion.