New build timber framed problem

jstephens251 · May 4, 2017

Hi everyone,

Thought I'd post here to see if any of you have wired new builds single storey, no loft with foil back insulation.

Its a high spec new build - downlights, data cables, speakers wires etc

I have attached a pic of the ceiling which has just been finished.

The problems i've got is there is barely a 40mm gap so drilling through will put me way out of regs. This stuff is stapled tight to ceiling so bit of a nightmare really.

Wondered what others have done to comply with regs.

Cheers, Jon

[ElectriciansForums.net] New build timber framed problem

Toneyz · May 4, 2017

I think the consensus is counter batten the ceilings Don't know what the walls are like but could not some of the RFC etc. cable runs go in horizontal to the sockets

LankyWill · May 4, 2017

I bet if you ripped the battens off and pulled that quilt insulation back it would reveal some joists. How else has wet pants plumbed it? Probably a case of impatient builder not waiting for you to first fix. Tell him to get the mongo labour in with a hammer to rip that insulation back.

Toneyz · May 4, 2017

Wet pants could be putting in floor however I was thinking along the same lines but the photo wasn't conclusive

Leesparkykent · May 4, 2017

I done a house similar to this last year. The company who supplied the timber frame was Scandia-Hus and the insulation looks the same. The builder reckoned the insulation was nearer the £200 mark a roll. The insulation was stapled to the rafters and studs. The studs were cross battened and the ceilings were dropped just enough to get down lights in using MF. The house wasn't far off passive house status.

LankyWill · May 5, 2017

That insulation is always made redundant anyway, as soon as you nail it on you create thermal bridging reducing the insualting properties by minimum 40%

ValewoodElectric · May 5, 2017

Architects give me headaches. They design everything with the smallest of tolerances because it if meets code it meets code. Sure it can be built and maintained but if they used their head a little bit and designed with more room in mind, installation would go much faster and be cheaper in the long run. As Ian said at the top of the page, maintenance rewiring on this is going to be a nightmare.

stummish · May 5, 2017

I love architects. They're so deluded. The rewire I'm doing at the moment has no measurements or consideration for routing pipes/cables.

I once had a fire alarm call point marked in the middle of a doorway! It even showed which way the door handed, I was so tempted to drop a 20mm steel in the middle of the hallway and send the pic to the architect for his critique!

Back on topic, batten off the ceiling, collingwood halers h2 fit in a 60mm void. Notch and joist plate cable routes, plasterer will hate you but that's pretty standard anyway. When they call you for any modifications in years to come tell them they'll have to have surface trunking, that'll be a laugh!

jstephens251 · May 5, 2017

LankyWill said:
I bet if you ripped the battens off and pulled that quilt insulation back it would reveal some joists. How else has wet pants plumbed it? Probably a case of impatient builder not waiting for you to first fix. Tell him to get the mongo labour in with a hammer to rip that insulation back.

Hi, plumber is ok its UFH. All piping is going in concrete floor so he's sorted.
Theres no builder really its a timber frame company who have built and insulated the shell. Insulation is stapled really tight so I would basically make it a right mess pulling it apart.
Customer is enquiring on battening ceiling out which hopefully happens.

cheers for help guys, much appreciated.

Toneyz · May 5, 2017

This company does a lot of kit type construction for the self build market a gang comes along and erects the frame in a couple of days then goes off site they would not come and go around trades it would not surprise me if there is a joist above insulation.

cliffed · May 5, 2017

Like the guys say,only way is to cross batten

Midwest · May 6, 2017

Des 56 said:
I once did a new build a quite a few years back,the architects name was Ian Goodenough
It is a genuine name for a guy that actually was good enough

As a bit of light hearted relief, I worked with a guy called Richard Cockhead, apparently it's pronounced 'Cohead', and for some reason, he insisted on being called Richard.

Also knew a cop called Police Constable Crook.

Wilko · May 6, 2017

Those of us who remember Maxwell Smart - I have met his namesake who was in the non comedic branch of that endeavour. I told him to get a real alias as that one was taken. He was not amused

Lee42 · May 6, 2017

Hi.

If there is no chance of cross battening I would notch the joist and put plates across them.

There is slim downlights that would fit and give great light output. I'll post an image off them.
The ones I have fitted in the past are aura enlite

I think keff do some slim speakers too

jstephens251 · May 6, 2017

Lee42 said:
Hi.

If there is no chance of cross battening I would notch the joist and put plates across them.

There is slim downlights that would fit and give great light output. I'll post an image off them.
The ones I have fitted in the past are aura enlite

I think keff do some slim speakers too

View attachment 36423

Cheers.

So, in case this battening idea didn't pan out is notching the joist and putting plates on acceptable with regs?

stummish · May 6, 2017

I've never done it but I thought that's what joist plates were for. Someone else will have to confirm that.

New build timber framed problem

jstephens251

-

Toneyz

LankyWill

Toneyz

Leesparkykent

LankyWill

ValewoodElectric

stummish

-

jstephens251

-

Toneyz

cliffed

-

Midwest

-

Wilko

-

Lee42

-

jstephens251

-

stummish

-

News and Offers from Sponsors

Similar threads

OFFICIAL SPONSORS

YOUR Unread Posts