have seen much discussion on boards with vent plugs open ,etc
what about sails in sail bags ??
if a wet sail stays in the car - besides mold , are there any other concerns ??
monofilm sails are to stay out of the sunlight, but what about HEAT (and cold for that matter)
there are so many other materials as well - PVC windows, X-PLY, etc, etc
locally people keep stuff in their trailers, but leave vents open
thx
jw
Canada, heat???? our vehicles can hit 60c if left in the sun with windows up in summer, good for blowing a board up with vent closed, but I've never heard of any sail damage. I guess sailing in 0c conditions some materials may get brittle but I've no idea really.
Sails won't rot or get mouldy unless you sail in fresh water and don't dry them very well. Salty sails are happy sails 
I store my sails permanently in my van. After use I dry them by standing them vertical in a shaded area out side for at least 24 hrs. When dry I return them to the van. I only rinse them if they are muddy at the end of the session.
sounds like good news
we hit about 32 degrees Celcius max max
in a car am sure that's around 50 or 60
and yes, so far have ONLY damaged sails in the cold - below freezing
if wet when it goes in the cold - gets brittle - logical
Select to expand quoteso far have ONLY damaged sails in the cold - below freezing
if wet when it goes in the cold - gets brittle - logical
What about the rider? Does he turn brittle and snap in those conditions? 
Perhaps it is time to emigrate to warmer water.
I had some evo 111"s from new in the van 24/7 and the mylar went brittle, i'm sure it was the heat as the van is a Toyota commuter , I have put some styrene foam packaging against the glass but still wouldn't trust leaving them in there 24/7
During the winter, the temps are below freezing where I live. I keep my sails in the garage with the sails inside the sail bags. Never had an issue. When I go windskiing in the winter, I use my sails in the snow and they handle fine. I do have a separate set of sails I use for the snow and keep the sails for the water stored in the garage until windsurfing season starts again. I do bring my board and fins in the house for the winter, but all my other gear stays in the garage.
Tip , don't buy a board , mast or sail that has been stored in rafters or trusses.
