Stud Insulation & wiring

rodred

Hi,

can someone tell me if it is safe to insulate the internal studs
where the wireing will be?

what is best practice?

thanks

CJhaughey

Its fine as long as you use rockwool/fibreglass. If you use polystyrene (not recommended) you need to run the cabling through conduit to prevent it reacting with the PS insulation.

Mellor

CJhaughey wrote: »

Its fine as long as you use rockwool/fibreglass. If you use polystyrene (not recommended) you need to run the cabling through conduit to prevent it reacting with the PS insulation.

Why would you use polystyrene?
it would provide almost no sound insulation.

I imagine (or hope) sound and not heat is the OP reason for insulating internal walls

rodred

Mellor wrote: »

I imagine (or hope) sound and not heat is the OP reason for insulating internal walls

yeah sound insulation only, any suggestion on best way to do it?

onq

rodred wrote: »

yeah sound insulation only, any suggestion on best way to do it?

215mm blockwork, 25mm rendered both sides - but that's a bit extreme

Actually it depends on the sound source, the frequency and what you hope to achieve.

Lightweight isolation strategy can be better than the mass abortive strategy I first outlined.

Think quilting between separate half-studs, but its specialist work

Stuffing the studs with Rockwool and double slabbing with staggered joints taped and skimmed each layer can offer a reasonable reduction, but without a more detailed knowledge of the conditions, it may be of little use.

ONQ.

rodred

Cheers for the feedback, i dnot have a clue what frequency of noise it will be, but usual household noise will be the norm.
i was thinking of 100mm fiberglass in the walls, will this have any effect
on the wiring or should i leave gaps in the insulation to allow for the wiring?

onq wrote: »

215mm blockwork, 25mm rendered both sides - but that's a bit extreme

Actually it depends on the sound source, the frequency and what you hope to achieve.

Lightweight isolation strategy can be better than the mass abortive strategy I first outlined.

Think quilting between separate half-studs, but its specialist work

Stuffing the studs with Rockwool and double slabbing with staggered joints taped and skimmed each layer can offer a reasonable reduction, but without a more detailed knowledge of the conditions, it may be of little use.

ONQ.

muffler

No matter what type of insulation you propose to fit Id suggest using conduit in any event. Your wiring is then guaranteed not to react with the insulation and you also have the benefit of pulling more wires through it should the need ever arise.

a12

At same stage myself. I'm putting 100mm rockwool between the studs and just slabing the walls.I have my wires running through conduit but this was only in case I needed to pull wire through at a future stage. I'm sheeting the bathrooms, ensuites and kitchen with 12mm WBP ply. and slabing over that, the main reason for this is to get fixings easily at a later stage but it's also bound to help reduce sound transfer from these rooms

rodred

thanks for the feed back, conduit it is then.

cheers