Mould on new PDF panelling - how to remedy before fixing skirting?

This is a UK and ROI specific subreddit, r/DIY has a lot of US Specific content, things like products to use, where to get them, laws and codes that don't apply to the UK. r/DIYUK is for UK and ROI specific DIY help, questions and projects.
How to post-insulate this cold flat roof
This is a UK and ROI specific subreddit, r/DIY has a lot of US Specific content, things like products to use, where to get them, laws and codes that don't apply to the UK. r/DIYUK is for UK and ROI specific DIY help, questions and projects.Can you put PIR plasterboard over existing plasterboard and rockwool insulation (flat roof)?
This is a UK and ROI specific subreddit, r/DIY has a lot of US Specific content, things like products to use, where to get them, laws and codes that don't apply to the UK. r/DIYUK is for UK and ROI specific DIY help, questions and projects.Please can someone fix my FIL and SIL faces on this, and bring my SIL/BIL closer towards me (groom?) - alternate pic to be provided with "good" faces!

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