Trackman Posted January 8, 2023 Share Posted January 8, 2023 Hi there, looking for some advice please. I am insulating above our 3bay garage in between the rafters with 100mm celotex and I want to panel out the whole roof and end gables with OSB board. I was looking at using 9mm thick OSB as it’s non structural area, what does everyone think? Is 9mm ok? thanks in anticipation Link to comment Share on other sites More sharing options...
Iceverge Posted January 8, 2023 Share Posted January 8, 2023 Is it for hanging shelves etc from? 9mm is a bit thin IMO. You might save yourself a lot of money and Hassle using batt insulation between the studs than cutting PIR too Link to comment Share on other sites More sharing options...
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