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    PIR in stud wall without gaps

    Thanks woody, I was going to use insulated plasterboard to avoid the cold bridge, or one wall will have 25mm PIR with ply over for supporting stuff on the wall better. I can use a vapour control sheet between ply and PIR, but the insulated board will be the VC, and so any gap behind wouldn't be...
  2. T

    PIR in stud wall without gaps

    I know I sound daft, but why can't I find 75mm Studs which are actually 75mm to match the 75mm thick PIR? Same with 100mm. I don't want gaps for services as it will be a workshop where trunking isn't an issue. Do I just need to go somewhere other than Wickes/TP etc?
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