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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.
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  • 0

    Zoomup:

    Damp meters may produce false readings and cables bridging cavity walls be blamed, but have a look at about 11 mins onwards in this video.

    https://www.youtube.com/watch?v=XORucdJ5zQw




     

    A bit of thread drift here, but that was interesting. The tradesman appeared to know his business. We have some damp in two bay windows. I feel sure that it is due to condensation because the bays are thinner and, therefore in winter, cooler than the main walls. It would be interesting to take some temperature measurements next winter.


    I don't think that damp meters are at fault (tho' some are better than others): they will show where the walls are damp (but you can see and feel that) but not why.
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  • 0

    Zoomup:

    Damp meters may produce false readings and cables bridging cavity walls be blamed, but have a look at about 11 mins onwards in this video.

    https://www.youtube.com/watch?v=XORucdJ5zQw




     

    A bit of thread drift here, but that was interesting. The tradesman appeared to know his business. We have some damp in two bay windows. I feel sure that it is due to condensation because the bays are thinner and, therefore in winter, cooler than the main walls. It would be interesting to take some temperature measurements next winter.


    I don't think that damp meters are at fault (tho' some are better than others): they will show where the walls are damp (but you can see and feel that) but not why.
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