Plasterboard on ICF - fixing options

[Bancroft]

What's the best way to secure plasterboard to ICF internal walls?

 

Option 1 - I've seen some people talk about screwing it directly to the strengthening plates in the ICF.  Seems like a quick and logical solution but I presume it means having to chase conduits into the ICF to allow for electrical/plumbing runs?  Not a major issue, especially with one of those heated wire tools and the cables probably need to be sheathed in plastic/metal protection.  Is there an issue regarding a lack of ventilation between the plasterboard and the polystyrene?

 

Option 2 - dot and dab.  Well-known/popular way to fix plasterboard but how well does it stick to the ICF polystyrene?  Also seems a bit old fashioned for a modern method of building.

 

Option 3 - 20mm battens affixed to the ICF strengthening plates and plasterboard affixed to the battens.  Leaves a space behind for cables without cutting into the polystyrene but reduces room size (marginal and also happens with dot/dab) and adds cost for battens.

 

I'm tempted to go for option 1 or 3 but would like to hear from others about what they've done and any other pros/cons people can think of.

[LaChab]

We did option 3, 'cos it seemed easier to DiY. 

We cut slots in the battens for the horizontal cables.

We used metric ICF so the panels matched exactly with the ties, but that probably doesn't matter much.

[JohnMo]

Although ours is woodcrete ICF we did 50mm battens and added a osb giving plate to top of wall for wiring. 50mm is good for any plumbing you run up or down the wall.  Zero carving out the polystyrene in your case.

 

[Nickfromwales]

What ICF system is it? Nudura for eg are Canadian, so you get imperial gapping of the integral bracing, so choose what will make 1st fix a doddle. 
 

You’ll get 3 rows of screws in, but the ones at the end will be into EPS. 

[Mr Punter]

With these sorts of issues I can understand why this system has not been adopted by the housebuilders.

[Stones]

Option 3 is how our house was done.  They used roof tile battens in our case.

[Russell griffiths]

I chased most of my cables in, if I did it again I would batten all the walls out. 
you will need to test lots of screws out if screwing into the nylon webs, most wood screws won’t grip if you over spin them. 
I have found the exterior screws in wickes grip perfectly as they have a very course thread. 
look for the 3inch ones if fitting a 25mm batten. 
no idea why they are imperial sizes. 

[LaChab]

Probably OTT, but I ran a bead of foam down each batten as I fixed it.