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Doubling up 50mm insulation boards

Discussion in 'Building' started by LeeDowner, 5 Nov 2017.

  1. LeeDowner

    LeeDowner

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    I'm fitting some internal wooden cladding/panelling.

    Behind it I have chopped out the plaster back to brick and I'm now going to insulate the wall before the panels go on. This particular corner gets mouldy every winter or else I wouldn't be doing the job, it needs insulation and the cladding is just a way to make it look nice.

    I bought 50mm polystyrene boards but now these don't look thick enough to have a shelf on top of the cladding so I'm thinking of doubling them up. Does this create an issue with a potential air gap between the boards ?

    Thanks, Lee.
     
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  3. catlad

    catlad

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    How are you going to have a gap?
    glue them together with expanding foam.
     
  4. geraldthehamster

    geraldthehamster

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