here in central japan we get up to 9 feet of snow per winter and any boats left flat can get crushed
1st winter i left my plastic kayak out it got dented by the weight of ice but after a few hours in the sun the dent popped out, try that with frp!
if we can't get boats in a shed we de-rig them and tie the hulls and mast up against a tree trunk with the bases sitting on old tyres so they are off the ground and have a little flex
eric e
if we can't