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How to fit electrical back box if there is no back?!?

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Steven Campbell

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Mar 10, 2011, 1:11:06 PM3/10/11
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I was installing a twin socket in a brick wall and had cut / chiselled out
the brick ready for the back box.
As I was drilling the remainder of the brick to hold the back box, the brick
fell into the cavity so I'm now left with a hole with no place to secure the
back box!!
http://i918.photobucket.com/albums/ad28/p3asa1/socket.jpg
Any suggestions?

Thanks


Tabby

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Mar 10, 2011, 1:24:24 PM3/10/11
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Either use sand & cement or filler to stick it in place, or else screw
it sideways into the inner wall leaf.


NT

chrisj...@proemail.co.uk

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Mar 10, 2011, 1:32:23 PM3/10/11
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On Mar 10, 6:11 pm, "Steven Campbell" <spam@away> wrote:
> I was installing a twin socket in a brick wall and had cut / chiselled out
> the brick ready for the back box.
> As I was drilling the remainder of the brick to hold the back box, the brick
> fell into the cavity so I'm now left with a hole with no place to secure the
> back box!!http://i918.photobucket.com/albums/ad28/p3asa1/socket.jpg
> Any suggestions?
>
> Thanks

Could you use a "dry lining" box intended for plasterboard?
http://www.tlc-direct.co.uk/Main_Index/Boxes_and_Enclosures_Index/Boxes_Dry_Lining/index.html#Dry_Lining_Plasterboard_Mounting_Boxes

Chris

ARWadsworth

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Mar 10, 2011, 1:42:21 PM3/10/11
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Is that an external wall?

However, I would try to get a piece of timber into the hole that is longer
than the horizontal bit of the hole and screw it to the wall and then screw
the backbox to the timber.

--
Adam


TheOldFellow

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Mar 10, 2011, 3:08:27 PM3/10/11
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18mm plywood. Drill two 20mm holes in it, put in a bit of string
between the holes. Wiggle it into place in the cavity with one end
behind each end of the back box cavity. While holding in position with
the string, put spray-foam nozzle into holes and get a big blob of foam
behind the wood and over to the outer wall leaf. Wait in this
excruciatingly painful position for about 10 minutes while the
spray-foam goes off. Tomorrow screw the back box onto the plywood.

Insulation, penance, and a good back-box in one.

R.

Roger Mills

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Mar 10, 2011, 3:15:28 PM3/10/11
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Looks like a nice clean hole. Stick it with Gripfill to the
brick/block-work which surrounds it. It won't move once the Gripfill cures.
--
Cheers,
Roger
____________
Please reply to Newsgroup. Whilst email address is valid, it is seldom
checked.

The Medway Handyman

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Mar 10, 2011, 3:35:04 PM3/10/11
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On 10/03/2011 18:11, Steven Campbell wrote:

Piece of timber longer than the hole is wide, large screw in middle to
give you something to hold.

Large blob of Gripfil on the ends that will contact wall.

Feed in diagonally, pull towards you & hold until Gripfil grabs enough.
Leave to dry & remove screw.

--
Dave - The Medway Handyman www.medwayhandyman.co.uk

Steven Campbell

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Mar 10, 2011, 4:45:26 PM3/10/11
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"Steven Campbell" <spam@away> wrote in message
news:B46dnRnT_cjiieTQ...@brightview.co.uk...


Guys as usual thanks very much for the varying suggestions
I'll just answer the lot here if that's ok..
Yes its an external wall. Which an extension has been built on to. However
the brick is only one skin thick here which I didn't know. It seems to have
been the old back door that they have bricked up. The other side is
plasterboard at 13 inches away so I think that might be just too much for
expanding foam.
A dry-lining box works by the lugs grabbing the plasterboard. Unfortunately
there would be nothing for them to grab.
I like the idea of just "grip filling" it in as the box is a tight fit
anyway.
Or the suggestion of a Piece of wood at the back with grip fill and screwing
on to that.

Thanks again for the numerous suggestions.

jgharston

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Mar 10, 2011, 5:46:43 PM3/10/11
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Steven Campbell wrote:
> As I was drilling the remainder of the brick to hold the back box, the brick
> fell into the cavity so I'm now left with a hole with no place to secure the
> back box!!

You're lucky. My sister-in-law was chiselling out a hole for a back
box when the bricks fell out into the next-door room leaving a nice
brick-shaped hole through the wall.

JGH

Nick Leverton

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Mar 10, 2011, 5:52:43 PM3/10/11
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In article <17e66268-e73e-41ff...@t16g2000vbi.googlegroups.com>,

All these herculeans are welcome to come round and dig us out some back
boxes, I've done two rooms of this brick so far and not looking forwards
to the rest !

Nick
--
Serendipity: http://www.leverton.org/blosxom (last update 29th March 2010)
"The Internet, a sort of ersatz counterfeit of real life"
-- Janet Street-Porter, BBC2, 19th March 1996

Triffid

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Mar 11, 2011, 4:29:21 AM3/11/11
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My brother in law was chasing a cable run into his bathroom wall for an
electric shower when an entire breeze block fell through into the bedroom
next door. It fell onto the bed where a wrapped-up wedding present was lying
(an expensive Dartington Crystal fruit bowl). Smashed it to pieces!

Still - good job there was no-one in bed...

--
Triff.

robgraham

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Mar 11, 2011, 4:34:17 AM3/11/11
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>
> >You're lucky. My sister-in-law was chiselling out a hole for a back
> >box when the bricks fell out into the next-door room leaving a nice
> >brick-shaped hole through the wall.
>
> All these herculeans are welcome to come round and dig us out some back
> boxes, I've done two rooms of this brick so far and not looking forwards
> to the rest !
>

Don't you mean 'Amazons' ! Impressed that one of the fair sex is
doing this sort of thing; there's no way I could get my wife to do
that.

Rob

jgharston

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Mar 11, 2011, 8:40:37 AM3/11/11
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robgraham wrote:
> Don't you mean 'Amazons' !  Impressed that one of the fair sex is
> doing this sort of thing; there's no way I could get my wife to do
> that.

She does most of the chiselling, first-fix plastering, painting
and decorating. My brother does most of the cable drawing,
wet plumbing and final fix plastering. I do the wiring and testing.

JGH

Tim Watts

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Mar 11, 2011, 10:20:37 AM3/11/11
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jgharston (j...@arcade.demon.co.uk) wibbled on Friday 11 March 2011 13:40:

<bowsdown> we are not worthy! </bowsdown>

--
Tim Watts

John Rumm

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Mar 11, 2011, 11:33:04 AM3/11/11
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Yup, if he could bottle that, he would be rich!

--
Cheers,

John.

/=================================================================\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\=================================================================/

John Rumm

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Mar 11, 2011, 11:33:58 AM3/11/11
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On 10/03/2011 22:52, Nick Leverton wrote:
> In article<17e66268-e73e-41ff...@t16g2000vbi.googlegroups.com>,
> jgharston<j...@arcade.demon.co.uk> wrote:
>> Steven Campbell wrote:
>>> As I was drilling the remainder of the brick to hold the back box, the brick
>>> fell into the cavity so I'm now left with a hole with no place to secure the
>>> back box!!
>>
>> You're lucky. My sister-in-law was chiselling out a hole for a back
>> box when the bricks fell out into the next-door room leaving a nice
>> brick-shaped hole through the wall.
>
> All these herculeans are welcome to come round and dig us out some back
> boxes, I've done two rooms of this brick so far and not looking forwards
> to the rest !

A decent SDS drill makes it child's play... I can do a double socket
cutout in brick in 10 mins these days.

John Rumm

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Mar 11, 2011, 11:41:32 AM3/11/11
to

My cousin Dave was revamping his kitchen once, and found a large lump of
Bath stone set into the wall that was in the way of a cabinet he wanted
to install. Having deduced it was not actually fixed in place he set
about wiggling it from side to side and pulling it out of the wall. With
a final huge heave it suddenly came free and he realised it was far
deeper than he had though. He also got a nice view of his neighbour sat
in his kitchen at the breakfast table smoking his pipe. The neighbour
sat there calm as a cucumber (having just watched a bit of his kitchen
wall slowly retreat all by itself), said to him in his rich west country
accent:

"Morning David, know what you are doing do you?".

Dave's answer being:

"Yup, I will be round to re-plaster your wall later!".

Steve Walker

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Mar 11, 2011, 4:23:45 PM3/11/11
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On 10/03/2011 22:46, jgharston wrote:

I've done that - a couple of days after decorating the other room :(

The funny one though was when we had cavity wall insulation put in. The
whole house is cavity wall, except for one small section - they totally
filled the electricity cupboard! Luckily it was a blown fibre and could
easily be removed.

SteveW

Nick Leverton

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Mar 11, 2011, 4:45:01 PM3/11/11
to
In article <2_SdnXC6Xqxp0-fQ...@brightview.co.uk>,

John Rumm <see.my.s...@nowhere.null> wrote:
>On 10/03/2011 22:52, Nick Leverton wrote:
>> In article<17e66268-e73e-41ff...@t16g2000vbi.googlegroups.com>,
>> jgharston<j...@arcade.demon.co.uk> wrote:
>>> Steven Campbell wrote:
>>>> As I was drilling the remainder of the brick to hold the back box, the brick
>>>> fell into the cavity so I'm now left with a hole with no place to secure the
>>>> back box!!
>>>
>>> You're lucky. My sister-in-law was chiselling out a hole for a back
>>> box when the bricks fell out into the next-door room leaving a nice
>>> brick-shaped hole through the wall.
>>
>> All these herculeans are welcome to come round and dig us out some back
>> boxes, I've done two rooms of this brick so far and not looking forwards
>> to the rest !
>
>A decent SDS drill makes it child's play... I can do a double socket
>cutout in brick in 10 mins these days.

Bit more of an amateur here with a Screwfix special SDS, plus our
bricks hereabouts have extra hard but brittle inclusions in (I warned
the electrician who rewired previous property to bring his extra-hard
chasing tool and he didn't believe me !).

Mathew Newton

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Mar 11, 2011, 5:57:03 PM3/11/11
to
On Mar 10, 10:52 pm, Nick Leverton <n...@leverton.org> wrote:

> All these herculeans are welcome to come round and dig us out some back
> boxes, I've done two rooms of this brick so far and not looking forwards
> to the rest !

You need to get yourself an SDS drill with chisel bit. It really is
the proverbial 'hot knife through butter' for this task...

Mathew

Nick Leverton

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Mar 11, 2011, 6:05:24 PM3/11/11
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In article <4fe24d1c-a3c7-4313...@t8g2000vbd.googlegroups.com>,

Have got one, but I spend ages battering through an inclusion to get the
damn socket to sit level and then the brittle thingy goes and busts that
half of the brick away ...

John Stumbles

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Mar 11, 2011, 7:33:25 PM3/11/11
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On Thu, 10 Mar 2011 20:35:04 +0000, The Medway Handyman wrote:

> Feed in diagonally, pull towards you & hold until Gripfil grabs enough.
> Leave to dry & remove screw.

or s/gripfill/1-part PU/


--
John Stumbles

YAPH

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Mar 11, 2011, 7:37:13 PM3/11/11
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On Thu, 10 Mar 2011 14:46:43 -0800, jgharston wrote:

> You're lucky. My sister-in-law was chiselling out a hole for a back box
> when the bricks fell out into the next-door room leaving a nice
> brick-shaped hole through the wall.

We were fixing a stout batten to a flimsy wall and put several 8mm holes
in nice and deep - full depth of the drill bit - to get 2 grey wallplugs
into each hole. Right length screws and you've got a really strong
fitting.

Then went into the kitchen next door to put the kettle on and realised
that an entire run of tiles on the other side was lying on the floor. The
tiling was hollow-sounding anyway, and the drill bit had just gone
through the 75mm block wall on each hole!

--
John Stumbles -- http://yaph.co.uk

Grimly Curmudgeon

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Mar 11, 2011, 8:50:39 PM3/11/11
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We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember Nick Leverton <ni...@leverton.org>
saying something like:

>All these herculeans are welcome to come round and dig us out some back
>boxes, I've done two rooms of this brick so far and not looking forwards
>to the rest !

Bugger that, you need a nice Armeg, you do.

jgharston

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Mar 12, 2011, 7:24:39 AM3/12/11
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YAPH wrote:
> Then went into the kitchen next door to put the kettle on and realised
> that an entire run of tiles on the other side was lying on the floor. The
> tiling was hollow-sounding anyway, and the drill bit had just gone
> through the 75mm block wall on each hole!

The previous owner of my house 30 years ago was putting
cupboards up in the kitchen and drilled the requisite holes
and pushed wallplugs into them. A few minutes later her
neighbour came round to return the wallplugs that she'd
discovered in /her/ kitchen.

JGH

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