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Discuss 1st fix metal back box fixing, how do you do it? in the Electrical Forum area at ElectriciansForums.net

Pete999

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Like the title says, I think it may have been posted before many moons ago. 1st fixing bac, boxes I used to bed all my boxes in with bricklayers compo ( the stuff they lay bricks with) wait until it sets, if you have time, and then drill and fix with rawlplugs and screws, how or what method is the trend these days?, not talking about fast fix boxes either.
 
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Baddegg

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I always mark up and drill and fit the plug then use thistle bonding push the box in and tidy up and screw back then screw a small piece of battern across the front to level with the existing wall till it dries tidy up with some fine fill....f I’m in a hurry I mix a bit of rapid set cement in with the bonding......
 

Andy78

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Just chase into the brick or block and drill and plug.
I would only use a mix if the brick had collapsed behind the box leaving nowhere to fix to. Drywall adhesive is favourite for this purpose as it is usually set in an hour if mixed stiff.
 

Baddegg

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Housing stock down here is either really old Victorian or before of new build plasterboard......all of nothing here :tearsofjoy:
 
Like the title says, I think it may have been posted before many moons ago. 1st fixing bac, boxes I used to bed all my boxes in with bricklayers compo ( the stuff they lay bricks with) wait until it sets, if you have time, and then drill and fix with rawlplugs and screws, how or what method is the trend these days?, not talking about fast fix boxes either.
I just set them in with bonding, no other fixings. I do make sure the hole is very wet with a sprayer and PVA if particularly crumbly.
 
Just chop out, drill and plug. As mentioned above, if brick or block collapses, skimming plaster used with dirty water (sets a lot faster)
 

Pete999

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Just chop out, drill and plug. As mentioned above, if brick or block collapses, skimming plaster used with dirty water (sets a lot faster)
So nothing much has changed then apart from the medium used?
 

Midwest

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Normal fixings for me.

Although I do recall a particular site, where some flats had 100mm partition walls. So we knocked out holes for back boxes, fixed em to battens face side, and mortared rear side. Dread to think what those Luton apartments re like now!
 
I like to bed em in. Drywall adhesive that's been sitting in the garage for nearly 2 years - rock hard after 1 hr and very strong hold, no screws needed. Bit 'slumpy' though.

Easifill 20 if in a hurry, no slump and can sand back easily if required.

I imagine thistle bonding 60 would be useful too, though I've only used it for plastering as yet.
 
2 x Red wall plugs and 1 inch screws

If the wall crumbles , then grad a handle of the old plasters bonding and set the box in a bit and attempt to get at least 1 screw fixing
 

Baddegg

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I like to bed em in. Drywall adhesive that's been sitting in the garage for nearly 2 years - rock hard after 1 hr and very strong hold, no screws needed. Bit 'slumpy' though.

Easifill 20 if in a hurry, no slump and can sand back easily if required.

I imagine thistle bonding 60 would be useful too, though I've only used it for plastering as yet.
Thistle bonding with a handful of extra rapid cement will get ya out of trouble :).....I always pva first and always plug and screw sockets, don’t mind just bonding light switches though...
 

pirate

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plenty other versions out there!

Just choose the right thickness of "biscuit"...it comes in "sitcks" so you can slice off the depth you need...

Once set, screw through the back...job done!
 
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