R
Rodnay
Any thoughts, Advice, Experience of running cables within cavity walls welcome please .
Discuss Cables run in Cavity Walls in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net
Rodnay
Think it was done alot in
the past, come across a few, to be honest my heart sinks when I find it, cables chucked down from loft to ground floor, no support in the way of clips except the rough edge of the concrete block its draped over in the loft. Dirty great holes bashed from cavity to K/O box.
Bad bad bad
Would never do it!
Slightly off-topic but you try tell that to static caravan manufacture's.....alot of modern caravans, most notibly Willbery have all the walls filled with polystyrene.....and the twin and earth literally just hidden in the middle of it.b). the cavity could be filled with polystyrene insulation, which reacts with pvc
maybe not,but at leastI know why women develop damp patches now,and there was me thinking it was the effect I had on them lol.cavity waal insulation does not react with the pvc of cables any more.
maybe not,but at leastI know why women develop damp patches now,and there was me thinking it was the effect I had on them lol.
c). and most importantly, the cable can rest against the inner wall and the outer wall,
and therefore becomes a 'bridge' for moisture to run from the outer skin to the
inside skin, and thereby creating a damp patch on the inside of the wall.
You talking about this??
This is just another old wives tale, You could say the same about the metal ties the brickies use or the insulation materials that fills the void. The only time your going to get damp between walls, is when the outer wall (or small area of it) is no longer watertight, eg ...unfilled holes, pointing failure etc!!
not true, wall ties have little zig zags on them so the water drips off in the middle of the cavity. it is a fact that things bridging the cavity can cause damp problems, i've seen it enough times. even on a new build where the brickies had not cleaned the snots off the ties, damp was coming right through as the outer wall was not rendered yet. and as for cavity wall insulation that fills the cavity, that certainly causes damp problems and theres loads on the internet about it.
only thing i'd run in the cavity is tails when doing board changes and there are only 16mm tails.
Glad you can SEE thatYo Richy3333 you iz on fire today!
not true, wall ties have little zig zags on them so the water drips off in the middle of the cavity. it is a fact that things bridging the cavity can cause damp problems, i've seen it enough times. even on a new build where the brickies had not cleaned the snots off the ties, damp was coming right through as the outer wall was not rendered yet. and as for cavity wall insulation that fills the cavity, that certainly causes damp problems and theres loads on the internet about it.
They might have now but they didn't before, they used to be solid affairs. So what are you saying that the outer brick skin is going to be sodden with water, ...Not on your Nelly, the only time water is going to enter cavity space above a damp proof membrane is when there is unsealed openings in the outer skin or if the wall needs re-pointing.
All this cables run in cavities causes damp in the house is just absolute rubbish. Not good practice it maybe, but for other good reasons ...not because they cause damp!!
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