How to Fix a Loose Concrete Anchor?

How To Fix A Loose Concrete Anchor
  • Author: Amanda Arnold
  • Posted On: July 15, 2022
  • Updated On: October 30, 2023

Contractors of all stripes use concrete anchors to install structural framing securely and permanently, among many other things. However, the process can be frequently challenging and time-consuming when those anchors need to be removed. Because a concrete anchor provides the major support to a large extent, you cannot afford to have them hanging loose. The good news is that it is easy to learn how to fix anchor bolts in concrete.

This post will discuss different techniques for fixing loose concrete anchors. So, you don’t need to hire a professional to do so. 

What is Concrete Anchor?

Concrete slabs may have concrete anchors to provide attachment places for items or structural parts. Every form of the anchor has a unique application and wide distinct varieties. The stability and safety of the construction depend on selecting the appropriate anchor for the task.

Various bolts and other parts make up concrete and masonry fasteners, which are intended to get firmly embedded in concrete, brick, and other hard materials. A concrete anchor repair is possible, when needed, however it takes time.

Components that expand while the bolt is drilled or inserted into the concrete can occasionally create a secure fit.

Strong adhesives hold other anchors in place. All concrete anchors stay in place even when put under much stress, making them challenging to remove. The amount of force these fasteners can endure varies according to their type, construction, and properties of the concrete.

How to Fix Concrete Anchor Bolts? 

Many projects occasionally require the removal of anchor bolts, from remodeling to electrical repair. To maximize the storage space available, warehouses frequently need to move pallet racks. However female anchor and male anchor are two common types of anchor bolts that can require fixing if loosened.

1. When Fixing Female Concrete Anchor Bolt

It is easier to remove female concrete anchors. Usually, the projecting bolt may be threaded back into place using a screwdriver and vice grips to leave the female anchor flat with concrete. If necessary, a hammer can drive the anchoring tube through the floor; in other instances, the tubes can be pulled out of the hole.

2. When Fixing Male Concrete Anchor Bolt

It can be significantly harder to remove male concrete anchors. Some anchors can be merely pounded into the earth if the hole beneath them is deep enough. Some must be split, leaving an above-ground nub, using a hacksaw or cut-off wheel.

Usually, a hammer can flatten the nub, though a grinding wheel may need to be used to level some larger nubs. All of this takes much work.

How to Fix Loose Screw Anchor in Concrete

Also known as a drywall anchor, screw anchors are used to create a strong mount on the drywall panel or any hollow wall. The screw anchor goes between the screw and the drywall allowing a strong grip. They are usually made out of plastic, nylon or are zinc-coated. However with wear and tear over time, you may need to fix a loose screw in concrete too.

There are three methods you can try to fix loose screw anchor.

Method 1: Also known as concrete screw, they are directly inserted into the correct. But in a case the screw comes out or get loose, the first thing to do is tighten the concrete screw by screwing again.

Method 2: If this doesnt work then you can try a copper wire method to fix loose screw-in anchor in concrete. In this method you need to fit a piece of copper wire in the screw hole. The wire will fill up some space in the hole and screw it tightly then.

Method 3: the thread on a concrete screw is spiral ridge which rotates when being screwed into the surface. Therefore the thread will act as a locker adhesive to set the screw-in anchor securely.

Steps To Fix Loose Concrete Anchor

To be able to fix a loose anchor in concrete you need to collect the following tools.

  • Hacksaw
  • Hammer
  • Chisel
  • Drill
  • Concrete patching
  • Vacuum
  • Masonry bit

For a home DIYer worker, these tools will be available at home, as most of them are basic concrete anchor repair tools. After collecting the tools, follow the instructions as discussed. 

Step 1: Check The Anchor Position

Before moving forward, inspect the anchor to ascertain how slack it is. This will aid your decision-making process. You may be able to tighten the anchor if it is only slightly loose. The anchor must be replaced if it has significant damage or has come entirely loose.

Step 2: Remove Damaged Anchor

The anchor must be removed if it is seriously damaged or disengaged. Use a chisel and a hammer to pry any concrete still adhered to the anchor free. After the concrete is gone, drill the anchor out of the hole to remove it.

Step 3: Clean The Hole from Debris

It is necessary to clean the hole after the old anchor has been taken out. By doing so, it will be possible to guarantee that the new anchor can bind effectively. Start by cleaning the hole with a wire brush to eliminate any debris. Next, remove any dust or dirt still there with a vacuum.

Step 4: Install Anchor

The new anchor should now be inserted. Screw the concrete screw, if you’re using one, into the hole. If a dowel-style anchor is used, hammer it into the hole. Next, tighten the nut on top of the anchor using a wrench.

Applying concrete glue is necessary after installing the new anchor. This will help secure the anchor and keep it from coming undone. The anchor’s base should first have adhesive applied around it. Use a putty knife to distribute it evenly after that.

How to Fill Anchor Holes in Concrete Without Any Damage

Only a small percentage of concrete anchors may be entirely removed without causing substantial damage. Instead, anchor bolt removal typically involves cutting or pulling out the above-surface portion of the anchor while leaving some of it entrenched in the surface. The remaining portion of the anchor and the hole can be filled in, leaving a flush surface, using a concrete patching solution.

Method 1: when about to fill anchor holes in concrete, remember that new concrete does not bond with old concrete. You need to add mortar mix instead. It should be less than 1 inch deep with gravel.

Method 2: You can also add a bonding agent to fix loose anchor or fill anchor holes in concrete. It is a liquid that acts as a bridge to join new and old concrete. You will need to use a paintbrush to drop in inside the hole (drip by drip). Just make sure there’s no standing water inside the hole. 


That is what it is, then. You don’t need to worry about when your concrete anchors will lose next time. You can fix it quickly if you follow these easy steps. You can use a hammer to force the anchor bolts back into the hole if they are detachable. If they cannot be removed, you must remove the old bolt and install a new one.


  • What is the Proper Way to Install Concrete Anchors?
    A metal sleeve with an unthreaded pin makes up each anchor. Drill a hole into the concrete, place the object being fastened over the hole, and then tap the anchor into the hole with a hammer. The sleeve expands as you drive the pin in, locking the anchor in the hole.
  • Can you Screw a Concrete Anchor?
    Using a hammer drill and masonry bit, create a pilot hole where needed, drilling it deep enough for the screw to pass through. Firmly insert the plastic anchor into the void. It ought to push in with a hammer with ease and fit tightly. Use a larger screw to press the plastic against the hole’s walls if the hole becomes a bit large.
  • Which Screws are the Best for Concrete Anchors?
    Hex head and flat head Phillips screw heads are the two options for concrete use. Hex screws can’t be flush to the surface, so while they’re simpler to drive in, they don’t look as attractive because of the high caps. The placement of the screw will therefore influence your choice.
  • What are the Reasons for Loosening Concrete Screws?
    Regular use is frequently the cause. Vibration can cause screws to loosen on chairs, doors, and outdoor power equipment. A loose screw is annoying, but it can pose a security risk.
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Author: Amanda Arnold

Amanda has been working with ConstructionHow since 2021. Her experience spans over 5 years in the creative niche such as home decor and trends, landscaping, renovations, and custom architectural values. As a home designer expert, she has a keen eye for the latest home improvement trends with accurate facts that readers find impossible to ignore. Being invested in home-building trends is how she has gained her lucrative expertise exploring more to bring a positive ambiance for all homeowners (and even tenants!). Currently, she lives in a beautiful beach home, a source of fascination for her.