1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Chasing Electric Cables into Breeze-block Wall

Discussion in 'Electrics UK' started by OneAvocado, 17 May 2013.

  1. ladiesman020

    ladiesman020

    Joined:
    13 Apr 2014
    Messages:
    32
    Thanks Received:
    1
    Location:
    London
    Country:
    United Kingdom
    My 1938 house has 75mm breeze/cinder block internal walls and I need to chase in a metal box for the 10mm t&e cable shower switch. Could I use a 35mm box or would I need a 47mm box.
     
  2. securespark

    securespark

    Joined:
    11 Jan 2004
    Messages:
    37,127
    Thanks Received:
    1,288
    Country:
    United Kingdom
  3. Sponsored Links
  4. John D v2.0

    John D v2.0

    Joined:
    26 Aug 2016
    Messages:
    6,369
    Thanks Received:
    883
    Country:
    United Kingdom
    Ours are 2 inch thick blocks on most internal walls but it's been wet plastered with lime plus a couple of skims on top, so I could easily chase cables into the plaster. The boxes I just used a Scutch chisel once I drilled the edges, best thing I bought and no damage next door bedroom etc.
    I was extremely nervous being a novice, but the only wall I had issues was a small area of cavity wall under the bay, one of the inside bricks came loose when chiseling.
    The same happened on the outside when I was clearing the old paint, a loose brick, followed by another, then...
    IMG_20160124_124322.jpg
     
  5. SimonH2

    SimonH2

    Joined:
    4 Nov 2010
    Messages:
    5,843
    Thanks Received:
    594
    Location:
    Cumbria
    Country:
    United Kingdom
    Oops.
    Mortar often isn't very strong, and a lot of walls are really just a stack of bricks relying on the weight of what's above to keep them solid. So when you go bashing into it with a chisel, where there isn't much weight on it, ...
     
  6. Sponsored Links
  7. John D v2.0

    John D v2.0

    Joined:
    26 Aug 2016
    Messages:
    6,369
    Thanks Received:
    883
    Country:
    United Kingdom
    I thought there was weight on it, that wooden post is holding up the upstairs bay and part of the roof!
    But I suspect the ground has shifted as there's little on the way of foundations on our house.
     
  8. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
Loading...

Share This Page