Courtney Thomas wrote:

That's what I was looking for....i.e. the reason that some/most
boatowners decide to cover, i.e. the destructive potential of the
thaw/freeze cycle of the encumbent precipitation.

What'd the old-timers do ?

Cordially,

Courtney

Here on the Atlantic Coast of Canada, I'd recommend a cover. We usually
get a lot of freeze/thaw cycles and the prevaling winds make us the
tailpipe of North America. That is...most of our pollution originates
in central Canada or the US.