matthew123 Wrote: ------------------------------------------------------- > cool > > one other concern is I want to put in some > electric sockets on both sides of the partition > wall - but to avoid the flexi blocks pushing up > against the electric wires (which may spark a fire > according to rockwool customer services) what sort > of thickness do you think I can go up to if my > stud partition is 3x2 (i.e. 64mm gap)? Not sure what Rockwool are on about Matthew, this is standard construction detailing. Assuming you want low level power sockets i.e. just above skirting height, the electrical cables are normally fed from underneath the floor void and directly through the bottom of the wall and into what is known as a back box. The wires are connected to the plug terminals inside this back box, and once the wall is plastered a face plate with plug holes is fitted over the back box. The insulation is just cut around the back box, so shouldn't come into contact with electric wires. If you are having new electrics you will need to get a Part P certified electrician to do the work and sign it off, ask them about what Rockwool said...