Fixing things to walls...

[indie]

Don't know if this is quite the right place to ask but i've got to put up an aerial up on an outside wall.

 

It's going into brick, does anyone have anything they recommend to screw into brick with?

 

I've found these Rawbolts, but it doesn't say if they are for use on brick, anyone?

[ajbritton]

I have been advised that Rawlbolts can destroy brick from the inside due to the forces they can exert. Having said that, I'm using them to build a deck onto the back of my house! So far, no cracking noises!!

 

Have a look through the the screwfix site/catalog. There's all kinds of stuff there. I think what you might really need is a simple combination of Rawlplugs and screw. Largish ones though, depending on how many fixing points you have.

[ChrisH]

Depends how heavy the thing is and what the bricks are like. We used to use those a lot to put up data cabinets on walls. They can be a pain to work with sometimes but if they grip they are very good. After those we moved onto some big screws which you screw in with a socket, coach screws I think.

[ajbritton]

If you do go with the Rawlbolts, make sure you thoroughly clean the holes first. I forgot once and completely clogged the threads with brick dust. I was able to remove the bolt, just, but it took ages to clean it up again!

 

Maybe you could get the supplier to put you in touch with an installer. They might be able to give you some free advice.

[indie]

Well the antenna is only 1.2KG but it's going up a 6ft pole so it needs to be fairly secure!

 

I'm using these as the brackets, so there's 4 fixing points.

 

Thanks for your suggestions, i'm going to have a word with our electrician also, he's put some cabinets up for us so he might have some ideas!

[Andrew_C]

How big is the aerial? Not the weight, but the area that the wind can act on. Is it a dish? Given a 6' lever you are going to get considerable turning moments on the fixings.

 

I would suggest Rawlbolts if the brickwork is sound and you are not going into a mortar course. The alternative would be chemical anchors. They are quite costly for just a few fixings as you need a big gun (like a bath sealant gun) and a two part epoxy goo. This is squirted into a clean hole, and a bit of threaded rod inserted.

 

Very strong indeed, and can be used in friable material, and close to corners etc.

[indie]

This is the Yagi in question, it's 76mm x 851mm, not huge, but not small.

 

The brickwork is sound and i won't be going into any mortar, just brick.

[Andrew_C]

If you are clear of mortar courses, and corners use rawlbolts. Wouldn't need to be too big M6-8 seem about right, depending on the hole diameter in the bracket I might go up to M10.