Again at the House of Pain I have to insulate a few walls (cos Part L says I do)- can't do them from outside (one run is a party wall), can't really do dot and dab (walls are extremely unflat in several planes plus I need solid fixings for various things) so am going the stud and Kingspan route-effectively its a partition wall in front of a real wall. And yes I need millions of wedges to get the studs vertical- not a big deal.
My quandary is in setting out. Plasterboard over the top will be 2400 x 1200 sheets so plan was to set studs and noggins at 600 centres. But if I do this (using 2 x 2 on this particular wall), I end up with gaps between studs of 525 (from corner to 1st stud) and 550 the rest of the wall. Which is going to mean hacking lumps off 'standard' 600mm wide insulation boards or wasting about 10% of 2400 x 1200 insulation.
The other option is to set the studs for the insulation (ie 600mm gap rather than 600 centres) and end up only getting 2000 ish cover from a 2400 plasterboard.
Or am I missing something obvious and vital here? And no I can't use rockwool or any of the other soft products- I'm only just getting away with 50mm Kingspan on the U value sketch.
Cheers,
My quandary is in setting out. Plasterboard over the top will be 2400 x 1200 sheets so plan was to set studs and noggins at 600 centres. But if I do this (using 2 x 2 on this particular wall), I end up with gaps between studs of 525 (from corner to 1st stud) and 550 the rest of the wall. Which is going to mean hacking lumps off 'standard' 600mm wide insulation boards or wasting about 10% of 2400 x 1200 insulation.
The other option is to set the studs for the insulation (ie 600mm gap rather than 600 centres) and end up only getting 2000 ish cover from a 2400 plasterboard.
Or am I missing something obvious and vital here? And no I can't use rockwool or any of the other soft products- I'm only just getting away with 50mm Kingspan on the U value sketch.
Cheers,