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- 31 Mar 2013
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We have had a single storey extension built with pitched roof. 100mm Celotex between joists and the plasterboard has 12.5mm polystyrene backing.
Is this enough? I was under the impression that the plasterboard had to be backed with celotex rather than polystyrene. Will the performance of polystyrene be enough?
Is this enough? I was under the impression that the plasterboard had to be backed with celotex rather than polystyrene. Will the performance of polystyrene be enough?