'Plugging' brickwork holes & rethreading loose masonry fixings?

[SteelMeadow]

Hi all, bit of a pickle with this one!

I have a gatepost secured to the side of a wall and i'm discovering much of the brickwork is incredibly soft and it's been roughly shut and fallen flat out of its fixing. I have remedied this for now with some brackets and screw fixings and all is good. But I would really like to bring the original fixings back into play...

And so I am wondering what would be the best way to go about this? Unfortunately re-drilling new points isn't an option and it'd likely be a similar outcome one day.

I am using DeWalt Hex Head Blue-Tip Concrete Screwbolts (M10 x 120mm) and am wondering if I can perhaps fill the existing holes with perhaps a mortar resin and re-thread the bolts into this? Would this give a good of enough grip adhesion against the brickwork to not just slip out with the bolt as one giant plug?

Many thanks for your time! Will be great to get this sorted.

 

[securespark]

Pictures may well help.

 

[23vc]

The type of fixings you’ve got are about right, but the hole needs to be exactly the right size so they go in tight and bite the masonry with the thread, but turn freely in the timber not threaded to it. Countersink them part way through the timber to get a good 75mm+ in the masonry.
Why can’t you drill new holes? Resin may possibly work, but shouldn’t really be needed

 

[opps]

I think the problem is that you are using concrete bolts in soft bricks rather than concrete.

You might be better off with long 10mm nylon plugs and long coach screws.

https://www.screwfix.com/p/fischer-duopower-long-nylon-wall-plug-10mm-x-80mm-25-pack/309HL?tc=IT3

 

[SteelMeadow]

I think the problem is that you are using concrete bolts in soft bricks rather than concrete.

Yes, I don't think they are quite right for the application really, I used an 8mm bit as DeWalt recommend and felt them cutting a good thread but the brick work is just too soft for such a heavy duty bolt I think. I hadn't really anticipated the brickwork being quite this soft but there you go

Going to go ahead with the resin and re-set the original bolts which hopefully should come together, I've been impressed with the stuff before.

But I will re-secure with fixings into the plugs I think opposed to any sort of cutting masonry screws / bolts, they're not quite right for this!

Thanks for the replies

 

[opps]

Yes, I don't think they are quite right for the application really, I used an 8mm bit as DeWalt recommend and felt them cutting a good thread but the brick work is just too soft for such a heavy duty bolt I think. I hadn't really anticipated the brickwork being quite this soft but there you go

Going to go ahead with the resin and re-set the original bolts which hopefully should come together, I've been impressed with the stuff before.

But I will re-secure with fixings into the plugs I think opposed to any sort of cutting masonry screws / bolts, they're not quite right for this!

Thanks for the replies

I use resin fix from time to time, but if you don't insert the fittings in quickly enough you are in a world of pain. I tend to use it for studs. If sticking with your bolts, you will need to ensure that the post is tight to the wall, not sure, but I don't think you will be able to tighten the bolts retrospectively.

 

[SteelMeadow]

It's well fixed in place and pulled back tight to the wall with the angle brackets now and some DeWalt Tapper-Pro screws and it's rock solid, but so it was with the original bolts! Just want to get something I won't have to worry about long term! It's a very heavy gate. I did perhaps think if inserting studs into the holes would be more prudent but the resin will either fix well or it won't so I can't see too much difference with the bolts.

Absolutely no thread left in the brick but I'll countersink as 23vc suggested and so I can then recut another inch or two of thread, plus the resin! I'm still going to go ahead and use the plugs on secondary fixings as I'm not entirely convinced the brickwork will grab to the resin like it does into concrete blocks. Have been through a few tubes before fixing some crack stitching so I won't be caught out by the setting! Thanks for the feedback