Drywall with isolationmaterial - tips and tricks to pull cables behind the wall?

Any good trick how to pull cables through isolation material behind a drywall (gips)?

For my BS9000 and BV10 I put on the wallmounts and measured where cable holes should come. Now after drilling first hole I do not know how to continue

For some weird reason I expected the wall to be hollow which it is off course not

So before calling my B&O delaer for his helpers ... all advise is welcome

Cables have to go down straight (behind the wall) for 100cm (BS9000) and 20cm (BV10)

Is the insulation material behind the drywall solid (like polystyrene or celotex) or fluffy (glass wool)?

If it's fluffy glass wool type, just a piece of firm wire pushed through and then hooked out with another piece. Put a loop on the wire and pull the cable through or use string. If it's polystyrene, I've used plastic conduit in a push and twist motion and sucked out the debris with a vacuum. Dave.

It's flyffy isolation material, and apparantly the wall is very well build, there are vertical and horizontal (!) wooden supports for the isolations stacks.

I have now a too short cable spring and am fiddling with indeed a piece of firm wire. AT one point I will succeed, but these kind of jobs always remind me that there is a reason why other people have this as their job. I am simply lacking their tools, craftmanship and experience and patience.

Thanks for the tips though - appreciated

EDIT: somewhat later, with an extra peekhole I managed to wire throug some flexible steel cable. The peekhole will be plastered and painted again. The top hole is behind BS9000. The bottom hole will be covered with something that looks similar to the poweroutlet.

 

I'll post some pictures by the end of the week when I am done

 

Go to tool shop and get what we call fiberglass fish rods. They are usually 1 meter sections that screw to geather, probably 5/10 in a packet. There are many types of "fish rod" available but the fiberglass sounds best for fluffy insulation material. 

A batten finder is also useful as you can see where the batons are before attempting the impossible.

I've had the exact same problem, but a much greater distance and succeeded with exactly the type of fiberglass (Kati Blitz) the previous poster has mentioned. Still, it is far from easy to do and there's no guarantee that it will work. Usually there is some sort of mineral wool behind the plaster and it depends how much air you have between this mineral wool and the backside (and what the backside is made of - concrete or again mineral wool form the other side). If there's hardly any space, the backside is again mineral wool and the distance is greater than 1 meter, chances diminish, I guess. In my case, I had plenty of space and a solid wall behind the plaster. So I could push all the way against the solid wall and hope to find a fortunate angle for the fibreglass to come out at a point that I could use. In fact, I managed to do this with only small holes of 1 cm in diameter. However, in different situations, it might be far more difficult...

I will post a picture of my wall-mounted Beolab 5000 with the wiring behind the plaster later at some stage. Good luck. It's not an easy task. If it was, you wouldn't see so many cable channels.

Cheers,

Kai

if all else fails try a straightened out wire coat hanger

Will only work vertically. In my case, I had to go diagonally, which was even more difficult to do. Cheers, Kai

Manbearpig:

Will only work vertically. In my case, I had to go diagonally, which was even more difficult to do. Cheers, Kai

Down, up, across those coat hangers go anywhere

Think you need some training