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sinking back boxes into walls - gone too deep

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imanc

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May 13, 2013, 2:25:22โ€ฏPM5/13/13
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I'm trying to fit 4 25mm back boxes into walls. I've pepper potted the
area with the drill then used a cold chisel to clear out the plaster and
brick. However, the result is not smooth. There's a lumpy mess and some
cracked brick that is stil somewhat firm, and the back box doesn't seat
right. With one recess the back box is about 5mm too deep.

I'm wondering if I can build up the chase with some polyfilla or
something to make it straight and the right depth before fitting the
back box?

I know that an SDS drill with correct chiselling attachment would do a
much neater job, but I don't have one to hand.

I've got 3 more holes to chisel out so any advice would be appreciated!

Cheers,
imanc




--
imanc

newshound

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May 13, 2013, 3:45:49โ€ฏPM5/13/13
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Polyfilla or even plaster will be fine. Ideally you should still have
two fixing screws into wallplugs, but with suitable filler you can get
away with one or even none. Finish plaster is slightly less good because
of shrinkage.

The other trick if you have two good screw fixings is to pack behind the
box with suitable slivers of wood so that the box is square when screwed
down.

Tim Watts

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May 13, 2013, 3:54:50โ€ฏPM5/13/13
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On Monday 13 May 2013 19:25 imanc wrote in uk.d-i-y:

>
> I'm trying to fit 4 25mm back boxes into walls. I've pepper potted the
> area with the drill

To a fixed depth? I wrapped tape around my drill as a depth marker when
doing this.

> then used a cold chisel to clear out the plaster and
> brick. However, the result is not smooth. There's a lumpy mess and some
> cracked brick that is stil somewhat firm, and the back box doesn't seat
> right. With one recess the back box is about 5mm too deep.
>
> I'm wondering if I can build up the chase with some polyfilla or
> something to make it straight and the right depth before fitting the
> back box?
>
> I know that an SDS drill with correct chiselling attachment would do a
> much neater job, but I don't have one to hand.
>
> I've got 3 more holes to chisel out so any advice would be appreciated!
>

I had the same problem on the odd occasion - when too enthusiastic with the
SDS or the bricks were a bit crap. Mix a bit of 4:1 mortar and lob it in the
back of the hole. Bed the box in to this. If you add a bit around the side
you can not bother with the fixing screw(s).


--
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John Rumm

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May 13, 2013, 4:12:20โ€ฏPM5/13/13
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On 13/05/2013 20:54, Tim Watts wrote:
> On Monday 13 May 2013 19:25 imanc wrote in uk.d-i-y:
>
>>
>> I'm trying to fit 4 25mm back boxes into walls. I've pepper potted the
>> area with the drill
>
> To a fixed depth? I wrapped tape around my drill as a depth marker when
> doing this.
>
>> then used a cold chisel to clear out the plaster and
>> brick. However, the result is not smooth. There's a lumpy mess and some
>> cracked brick that is stil somewhat firm, and the back box doesn't seat
>> right. With one recess the back box is about 5mm too deep.
>>
>> I'm wondering if I can build up the chase with some polyfilla or
>> something to make it straight and the right depth before fitting the
>> back box?
>>
>> I know that an SDS drill with correct chiselling attachment would do a
>> much neater job, but I don't have one to hand.
>>
>> I've got 3 more holes to chisel out so any advice would be appreciated!
>>
>
> I had the same problem on the odd occasion - when too enthusiastic with the
> SDS or the bricks were a bit crap. Mix a bit of 4:1 mortar and lob it in the
> back of the hole. Bed the box in to this. If you add a bit around the side
> you can not bother with the fixing screw(s).

I keep an old bag of bonding plaster for such occasions... slap it in,
it goes off quick.


--
Cheers,

John.

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| John Rumm - john(at)internode(dot)co(dot)uk |
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Frank Erskine

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May 13, 2013, 6:39:24โ€ฏPM5/13/13
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On Mon, 13 May 2013 20:25:22 +0200, imanc
<imanc....@diybanter.com> wrote:

>
>I'm trying to fit 4 25mm back boxes into walls. I've pepper potted the
>area with the drill then used a cold chisel to clear out the plaster and
>brick. However, the result is not smooth. There's a lumpy mess and some
>cracked brick that is stil somewhat firm, and the back box doesn't seat
>right. With one recess the back box is about 5mm too deep.

Use a deeper back box!

--
Frank Erskine

Dave Liquorice

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May 13, 2013, 6:33:30โ€ฏPM5/13/13
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On Mon, 13 May 2013 20:25:22 +0200, imanc wrote:

> There's a lumpy mess and some cracked brick that is stil somewhat firm,
> and the back box doesn't seat right.

Get one fixing ready, lob in some stiffly mixed old plaster, push in box
and use fixing. position and leave.

> With one recess the back box is about 5mm too deep.

Is that a problem? You can get longer accessory screws if the ones you
have are too short.

> I've got 3 more holes to chisel out so any advice would be appreciated!

I'd not pepper pot, just closely drill around the edge to a consistent
depth. It's easier to cut big bits out of a solid mass rather than one
full of holes.

--
Cheers
Dave.



Dave Plowman (News)

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May 13, 2013, 6:51:37โ€ฏPM5/13/13
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In article <imanc....@diybanter.com>,
imanc <imanc....@diybanter.com> wrote:
> I'm trying to fit 4 25mm back boxes into walls. I've pepper potted the
> area with the drill then used a cold chisel to clear out the plaster and
> brick. However, the result is not smooth. There's a lumpy mess and some
> cracked brick that is stil somewhat firm, and the back box doesn't seat
> right. With one recess the back box is about 5mm too deep.

> I'm wondering if I can build up the chase with some polyfilla or
> something to make it straight and the right depth before fitting the
> back box?

Quick set cement.

http://www.tlc-direct.co.uk/Main_Index/Fixings_Index/Cement_and_Plaster/index.html

--
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Dave Plowman da...@davenoise.co.uk London SW
To e-mail, change noise into sound.

The Natural Philosopher

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May 13, 2013, 7:37:47โ€ฏPM5/13/13
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On 13/05/13 23:51, Dave Plowman (News) wrote:
> In article <imanc....@diybanter.com>,
> imanc <imanc....@diybanter.com> wrote:
>> I'm trying to fit 4 25mm back boxes into walls. I've pepper potted the
>> area with the drill then used a cold chisel to clear out the plaster and
>> brick. However, the result is not smooth. There's a lumpy mess and some
>> cracked brick that is stil somewhat firm, and the back box doesn't seat
>> right. With one recess the back box is about 5mm too deep.
>> I'm wondering if I can build up the chase with some polyfilla or
>> something to make it straight and the right depth before fitting the
>> back box?
> Quick set cement.
>
> http://www.tlc-direct.co.uk/Main_Index/Fixings_Index/Cement_and_Plaster/index.html
>
car body filler, then replaster. with luck no screws needed. :-)


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Bert Coules

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May 13, 2013, 9:01:05โ€ฏPM5/13/13
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I've no idea if this in an approved method (and rather suspect that it
isn't) but I've mounted several sets of backboxes-in-a-row by first screwing
them to a wooden backplate and then putting the whole assembly into a
slightly oversized hole partially pre-filled with plaster/cement/mortar/what
have you.

The beauty of this approach is that it ensures that the boxes, and therefore
the front plates, are all perfectly in line and evenly spaced - something I
could never achieve when I used to do it one box at a time.


Windmill

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May 13, 2013, 9:19:02โ€ฏPM5/13/13
to
I've had better results with an SDS chisel than when I tried drilling
then hand chiselling, but still not perfect. However with a metal back
box it's sometimes possible to put a large metal repair washer (or 2)
behind one of the box mounting holes. Quick and easy, if not ideal.

--
Windmill, Til...@Nonetel.com Use t m i l l
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Windmill

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May 13, 2013, 9:23:27โ€ฏPM5/13/13
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Or do as some professionals (?) have done and just take care not to
attach the socket too tightly (which might crack it).

Bill Wright

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May 14, 2013, 12:26:52โ€ฏAM5/14/13
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Windmill wrote:

You can set the boxes in gunnanail or nomorenails. Bend the unused
knock-outs in slightly so there's a key for the adhesive. No need for
screws.

Bill

harry

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May 14, 2013, 1:45:12โ€ฏAM5/14/13
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> imancAds not by this site

Tap all the knockouts in the box in very slightly and set the box in
the hole with cement. Leave the knockout(s) you want to use
clear of cement. Make sure the threaded holes for your
switch/socket are clear of cement.

Brian Gaff

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May 14, 2013, 2:39:41โ€ฏAM5/14/13
to
Yeah you can use all sorts of stuff for this. Once when younger and still
sighted I just bunged in some filler, then the box, levelled it up and held
it in the right spot with tape till filler dried, took it apart and drilled
the holes for the plugs. Its still up.
I guess its like, what the eye does not see....

Brian

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stuart noble

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May 14, 2013, 4:24:37โ€ฏAM5/14/13
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Industry standard IME. I guess that's why our electrical wholesaler has
it stacked by the front door.

ARW

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May 14, 2013, 2:53:52โ€ฏPM5/14/13
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Do you want a job?

The only difference is that I mount the wooden board to the wall and then
fit the back boxes.

--
Adam


ARW

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May 14, 2013, 2:57:09โ€ฏPM5/14/13
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Dave Liquorice wrote:
> On Mon, 13 May 2013 20:25:22 +0200, imanc wrote:
>
>> There's a lumpy mess and some cracked brick that is stil somewhat
>> firm, and the back box doesn't seat right.
>
> Get one fixing ready, lob in some stiffly mixed old plaster, push in
> box and use fixing. position and leave.
>
>> With one recess the back box is about 5mm too deep.
>
> Is that a problem? You can get longer accessory screws if the ones you
> have are too short.


Having the back box set 3mm behind the plaster finish is the correct way to
install back boxes for use with flat plate switches and sockets.

--
Adam


ARW

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May 14, 2013, 3:00:05โ€ฏPM5/14/13
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Bloody good stuff that out of date bonding.

--
Adam


zaax

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May 14, 2013, 5:13:31โ€ฏPM5/14/13
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On 13/05/2013 19:25, imanc wrote:
>
Yeah or pack it with a piece of wood or what ever you have lying around.
I've used old lino tiles before from my box of shims.

--
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Larry

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Jan 22, 2022, 2:15:06โ€ฏPM1/22/22
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Clever, best suggestion yet ๐Ÿ‘

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For full context, visit https://www.homeownershub.com/uk-diy/sinking-back-boxes-into-walls-gone-too-deep-895412-.htm

Larry

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Jan 22, 2022, 2:15:06โ€ฏPM1/22/22
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Trying to think who is more resourceful you or a break dancer ๐Ÿ•บ, with the Lino ๐Ÿคฃ

Larry

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Jan 22, 2022, 2:15:07โ€ฏPM1/22/22
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Very resourceful

bob

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Jan 22, 2022, 4:15:06โ€ฏPM1/22/22
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I think he probably solved it in the last 8 years.

Fredxx

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Jan 22, 2022, 4:16:08โ€ฏPM1/22/22
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On 22/01/2022 19:15, Larry wrote:
> Clever, best suggestion yet ๐Ÿ‘

What an idiot!

Before replying to an 8 year old post from a broken website, please read
and digest this:
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Brian Gaff (Sofa)

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Jan 23, 2022, 4:24:55โ€ฏAM1/23/22
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I'm laughing that we still get nonsensical posts here from dingbats who
use Home Owners club to post from.
Brian

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"Larry" <7b28daf1b942329c...@example.com> wrote in message
news:16ccada88da544cc$3$3913060$4016...@news.newsgroupdirect.com...
> Trying to think who is more resourceful you or a break dancer ??, with the
> Lino ??
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