[RoofGator]

Hole was drilled out slight too big for the tapcon screw to grip onto. How can I fix this? Can I just fill the hole with concrete epoxy and set the screw in the hole while the epoxy is curing? Or do I completely filled the hole and then drill it out again?

I have a tube of loctite PL max premium adhesive. Would that work?

 

[RoofGator]

Do you have some nylon string from a weed eater. Put a piece or two in with the screw.

Hmm interesting idea.

 

[RoofGator]

Hard to say when you haven't told us what size tapcon you are using or what size hole you made. If you have 3/16 tapcons throw them as far as you can and use 1/4" tapcons. Otherwise try Neal's string shim trick.

I am using using 1/4" tapcons.

 

[RoofGator]

What are you trying to hold up with the Tapcon?

The screws are holding up a metal bracket bearing a good amount of weight.

 

[RoofGator]

You might also be able to just use a longer screw. 3/16 sds works well with 1/4" tapcons.

I can try that too. What about using some kind of adhesive or epoxy? I've used epoxy for anchoring bolts on ground. Would they work with wall screws?

 

[RoofGator]

Just one Tapcon hole drilled too big?
Any of the solutions, the wire, wood or trimmer line should work.
And you will know as you tighten it if it is holding.

I think a second hole might be too big. I think the issue with using wires to thread the screws is that it won't fit through the metal bracket.

 

[RoofGator]

Soon maybe he will try any one of the ideas that would be free or less than $1 and tell us how easy that was or he will go spend $20 on some epoxy.

I wanted to update what I eventually ended up doing a while ago. I got some thick copper wire, straightened it out, and inserted into the hole. Drilled the screw in and it was solid. It's not going anywhere! This solution will also allow me to remove the screw in the future. The epoxy solution would have been permanent.

Thanks for this suggestion!

 

[RoofGator]

We pin to concrete all the time, same thing, just with nails.

What about for roof applications?

 

[RoofGator]

We don't see to many concrete roofs.

I don't mean concrete roofs. I mean attaching framing/joists/etc to concrete walls.

 

[RoofGator]

I would use the next size larger Tapcon.

The hole in the metal plate wouldn't have taken it