Cladding options - Cedral weatherboard or Freefoam?

[tomfe]

You should be insulating between the studwork leaving an inch gap so when you fit the membrane on the studwork you will have an inch gap behind, then fit you batons to the studwork which will give you another gap behind the cladding.

Not sure if I have read this correctly but you want to leave an unvented void between the sheeting and the insulation? So:
pb - stud work with insulation- void- sheeting - more insulation - membrane - batons (vented void)- cladding
This is real bad idea, you should not have any unvented voids in the building fabric especially between two layers of insulation, you will get condensation and stale air in there.

 

[catlad]

Sorry what I was should have said was there will be an inch gap behind the membrane.
I don't understand two layers of insulation?

 

[Chris gibbon]

Hi - I'm interested in doing the same - my house is single skin blockwork upstairs, and I want around 50-75ml of kooltherm insulation - my concern is even if we have 400ml between the batons, and heavy duty screws into the blockwork, would there be play on the batons when adding the weatherboards, due to having 50/75 ml of the screw through the insulation before it got to the brick?