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minesskiier t1_ix9klom wrote

The sweating and rotting would come about because a moisture barrier is blocking moisture from escaping. It's got nothing to do with the Kingspan. Feel free to add as many as you need or want. Do you live in a humid environment ? In Colorado, I'd never worry about is as I live in a very dry environment .

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thrwaygrdn OP t1_ix9mgi3 wrote

So plasterboarding tightly underneath and putting floorboards direct on top should be fine? And I’m from the UK, I tried the UK DIY sub but only received some vaguely related replies and not what I was looking for so I thought I’d check this sub. Lots of rain where I’m from, all year through ha.

Thanks for the reply!

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minesskiier t1_ix9muk7 wrote

I think I'd call up one of your local insulation companies and ask for guidance. I'm guessing you'll be good, but moisture is a serious issue and getting your layers wrong can cause problems.

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