Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 34 replies
  • Subscribers 32 subscribers
  • Views 12726 views
  • Users 0 members are here
Options
You may also be interested in
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Wall Cavity Wiring.

Zoomup
Good morning on this bright and sunny start,


                          Q. Which regulation(s) specifically prohibit(s) the installation of cables in brick and block cavity walls within the cavity?


in a, Older premises?


    b, Newer premises?


If regulations exist, what reasons are provided for the prohibition? Or are we just concerned about chemical damage of cable insulation if the cables are in contact with some types thermal insulation?


Z.
Parents
  • 0

    Sparkingchip:

    So you're lying on a bit of board spread across the top of the ceiling joists having pulled the fibreglass insulation back trying to drop a fishing line down the cavity over the top of the wall plate when you discover the brickies sealed the top of the cavity,  just like they are supposed to.


    Andy 




    Vented cavities were all the rage in the 50s. they usually left the wall uncapped and put air bricks in the wall at low and high level. I was told it was to allow the cavity to breath and therefore dry. But of course for insulation purposes it effectively reduced the wall to a single brick. I was even worse in my own house as there were also air bricks at high level internally. 


    I did an EICR on a TT house. The tails disappeared into the wall by the meter (no upfront RCD and only the suppler fuse) and emerged about 4metres horizontally, having run under the kitchen window,  and 1.5 metre vertically away having run through the cavity. From memory I gave it a 3 with lots of words about the potential risk, should it have been a 2 but as has been said what reg?

Reply
  • 0

    Sparkingchip:

    So you're lying on a bit of board spread across the top of the ceiling joists having pulled the fibreglass insulation back trying to drop a fishing line down the cavity over the top of the wall plate when you discover the brickies sealed the top of the cavity,  just like they are supposed to.


    Andy 




    Vented cavities were all the rage in the 50s. they usually left the wall uncapped and put air bricks in the wall at low and high level. I was told it was to allow the cavity to breath and therefore dry. But of course for insulation purposes it effectively reduced the wall to a single brick. I was even worse in my own house as there were also air bricks at high level internally. 


    I did an EICR on a TT house. The tails disappeared into the wall by the meter (no upfront RCD and only the suppler fuse) and emerged about 4metres horizontally, having run under the kitchen window,  and 1.5 metre vertically away having run through the cavity. From memory I gave it a 3 with lots of words about the potential risk, should it have been a 2 but as has been said what reg?

Children
No Data

Community Rules & Guidelines