Rewiring flat with concrete everywhere.

[james the spark]

Hi Iv been asked to price a rewire in a 9th floor flat with cast concrete walls floors and ceilings the customer is adamant they wont have trunking or lower the ceiling's, putting coving up also wouldn't work due to there being to many obstacles.

It is currently wired in pyro chased into the concrete.

Im thinking chase round high level then drop down to each point, but what about the center lights can you chase the concrete ceiling and fit conduit? or would I need to have it assessed by a structural surveyor.

 

[Lucien Nunes]

I know this is not answering your question but this might be one of those situations in which MI pays for itself. I would be looking to re-use as much existing cable as possible and making new additions and replacements in MI too, to minimise chasing.

 

[SagaCU29]

Hi Iv been asked to price a rewire in a 9th floor flat with cast concrete walls floors and ceilings the customer is adamant they wont have trunking or lower the ceiling's, putting coving up also wouldn't work due to there being to many obstacles.

It is currently wired in pyro chased into the concrete.

Im thinking chase round high level then drop down to each point, but what about the center lights can you chase the concrete ceiling and fit conduit? or would I need to have it assessed by a structural surveyor.

I would personally give it a wide berth. Once worked in a tower block changing singles to doubles and the noise that's made chasing walls had neighbours from up and down complaining, not worth the hastle.

 

[snowhead]

Unless you're very competent with M.I,, Pyro,, then don't even think about it otherwise you'll have to pay someone else to do it.

It's unlikely you'll be able to chase the ceiling for structural reasons and more importantly as above the noise.
The M.I is most likely fixed on top of the concrete then plastered over it won't be chased.
It could also be singles in steel conduit embeded in the concrete

Before you quote, if you do, you need the customer to speak to the neighbours above, below and at the sides and get written agreement about the noise, otherwise you could end up being stopped half way through it all and it'll get messy re getting paid.

 

[Deleted account]

With the restrictions placed on you I would walk away.

I would only contemplate this job if the cielings and walls were buttoned.

sorry battoned not buttoned.

 

[james the spark]

Thanks for the advise good point about the noise complaints, I think battening the ceiling would be the sensible option bit don't think the customer will do for it il put that to them and see what the response is.

 

[Deleted account]

Thanks for the advise good point about the noise complaints, I think battening the ceiling would be the sensible option bit don't think the customer will do for it il put that to them and see what the response is.

I sometimes spend hours doing research quotes etc... knowing the customer 8s going to say no. Don’t know why I do it.
I think this may be the case with this job for you.
good luck, but if your not short on work I’d limit your valuable time with this one until they compromise.

 

[Dustydazzler]

Unless the ceilings and walls are being batten & boarded I wouldn’t touch this with a barge pole.
Some years ago I did a council flat and chased everything out and it took fecking ages. Never again ...

 

[buzzlightyear]

Mi is bomb proof, unless you now what your doing then sub contract to some body else.

 

[buzzlightyear]

Unless the ceilings and walls are being batten & boarded I wouldn’t touch this with a barge pole.
Some years ago I did a council flat and chased everything out and it took fecking ages. Never again ...

You can say that again. One angle cutter and leave the widows open.

 

[Dustydazzler]

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[7029 dave]

Why does the MI need rewiring, it's one of the best cable's ever installed.

 

[brianmoooore]

Why does the MI need rewiring, it's one of the best cable's ever installed.

Probably doesn't as such. It'll be more that there just isn't much wiring in the place.

 

[7029 dave]

Probably doesn't as such. It'll be more that there just isn't much wiring in the place.

In that case they can limit the work to additional circuits/alterations, other than tear the place apart, especially with the added conditions which have been explained.

 

[Mike Johnson]

The concrete reinforcement in ceilings, floors and walls are at a specific depth to transfer the stress of the structure into the surrounding concrete its called d1 in structural terms decreasing that depth over any distance is reducing the integrity of the structural member, in other words DON'T DO IT, the existing cable or conduit will not be in the structural zone or calculated depth of the structure so could be safely used again.

 

[FatAlan]

Surface mounted galv conduit. The industrial look is in vogue you know. ?

 

[FatAlan]

Surface mounted galv conduit. The industrial look is in vogue you know. ?

Plus, it has the advantage that you can hang things off it. Charge double for an easier job. They’d lap it up in Kensington.

 

[Mike Johnson]

Fixed with double sided tape so you don't drill into the concrete, ? And don't forget to make the conduit a feature by painting it bright red.?

 

[james the spark]

Why does the MI need rewiring, it's one of the best cable's ever installed.

Due to pretty much everything changing position, there willing to pay for plenty time on the job other wise I wouldn't be considering it!!!

 

[Lucien Nunes]

Tapewire is your friend ?

See:
Tapewire flat tape wiring pics

Wait, is that a giant wiring that place? And look at those massive tools!