Chipboard, or OSB? The former at 18mm is usually only rated up to 450mm centres?
Edit: actually some T&G chipboards do go up to 600mm centres, seems to depend on the manufacturer.
the former yep, good to know, cheers!
As it's not a habitable room, you can go with your gut really... are you storing xmas decorations on it, or using it for skipping practice, etc.
@hvsds started
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Chipboard, or OSB? The former at 18mm is usually only rated up to 450mm centres?
Edit: actually some T&G chipboards do go up to 600mm centres, seems to depend on the manufacturer.