Kevin is correct, build a test panel with your preposed laminate and then bend it till it breaks. If the failure mode is fibre breakage then you're probably ok. If it fails by core breakage or skin delamination off the core, look for a new core.

When doing this sort of home build/design project. There is a lot to be said for paying someone to specifiy your laminates. In my experiance 9/10 home built boats are over built. While this doesn't sound like a problem it does mean you've wasted a lot of money on materials that you didn't actually need. The other 1/10 are underbuilt and we all no the issues with that. Some basic composite engineering will cost you less than the money you save in excess or poorly specified materials and will allow you more confidence to head out to sea.