Newtonite Lathe

[mhar]

with about 15mm of sand and cement render on it. Do I have any choice other than surface clipping or trunking? Feeding from above.
Only other options I can think of are :-
1) to try and drop cables (2.5mm t&e) behind it and break through but this will destroy the lathes integrity, as will the fixings for what will have to be a surface mount box
2) to try and run the cables down between two of the ridges but am concerned about the shallow depth of the one coat plaster I would have to use (maybe have to not run in pairs but side by side to reduce the profile of the cables) but will still have the box fixing problem
3) fix sockets above the lathe but this would be at a height of approx 1m.
Any advice please?
There will be about 10 sockets to fit + storage heaters

 

[a1guvner]

Confused.com

 

[brman]

Confused.com

So was I until I went to google.... 800 - Damp Proofing | Newton

I'd be tempted to call Newton Membranes for advice.

 

[mhar]

Yes I will be calling them. However I expect them to say that I mustn't affect the integrity of the membrane.
I was hoping that other members may have encountered this problem and have come up with a solution

 

[Amp David]

Confused.com

I thought why would a Lathe have sand cement render on it?

 

[Yooj]

Definately talk to the membrane company. I did a similar job last year where a basement was membraned, and they provided me with special fixings which, when used ensured the integrity of the membrane. They will probably have a guarentee in place for the membrane, and if you pierce the membrane without the correct fixings/procedures, then the guarentee will be void. So definately err on the side of caution on this.

Yooj

 

[londonlec]

I haven't bothered looking at the link but when properties have had DPC works you should fill the drilled holes with resin, then plug and screw.

 

[mhar]

Thanks.
Have spoken to the membrane company. Luckily and because we are above ground (not a basement) they say that I can channel through the membrane if I am unable to get my cables down the flutes behind it and can cut the membrane to mount boxes although I will not be able to use steel boxes or screws. Every cut I make must be sealed with a waterproof mastic to seal the membrane to the wall so now I have the prospect of cutting a precise hole in the membrane, removing about 10mm of beach pebble neatly (hard as **** and round!) through this hole, sealing the cut membrane to the wall, inserting a pvc pattress box box, sealing my screw holes, sealing my cable inlet holes and then sealing the box to the membrane.
The membrane is about 50-60 years old so no guarantee to worry about, only personal standards!

 

[brman]

I'd also be tempted to tell the owners of what you plan to do and the potential problems it might cause. They might decide surface mount is less of a risk and it will be easier for you!