Multi-purpose deck/roof

[Beano]

I have to replace a dimondek 400 steel rool that is at the end of its life however it is right next to a unit that could benefit from having a outdoor area .
Has anyone experienced this type of product ?
https://www.vikingroofspec.co.nz/det...tion=brochures

[John the builder]

a roof deck needs specific design that your roof might not have at present?