Does the Kingspan TEK Building System need a vapour barrier?
Domestic buildings that have standard detailing for the TEK roof and wall system can forego the requirement of a vapour barrier if a mechanically assisted ventilation and extraction system is installed such as an MVHR system (mechanical ventilation with heat recovery). Non-domestic buildings will almost certainly require a vapour barrier and should be assessed in accordance with BS 5250 depending on their use.
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