Mould on roof - under car cover

[Monsterlime]

My Chimaera is parked on my drive, under a car cover (Weathershield) 95% of the time.

Due to the recent weather, it hasn't seen much use and I noticed when I took the cover off this weekend, mould had started to form on the roof. I have cleaned it off and let the car "air" overnight, but it will be going back under the cover tonight.

I did clean and treat the roof with the Autoglym Cabriolet Maintenance Kit (cleaner and waterproofing treatment) in August. While I can do this again, is there anything else I can do to try and prevent the mould from building up over winter? I assume this is due to moisture being trapped between the hood and cover.

Thanks

[SSPPGG]

some covers claim to be breathable, but always suggest a good airing for the car once a week.

thats about all you can do

[skiver]

You could lay something on the roof to create an air gap between the roof and cover, say a few thin strips of wood, but you'd have to make sure whatever you use has no sharp edges which will wear through the cover.

[Dr Mike Oxgreen]

Perhaps some lengths of guttering, placed upside down with the curved part uppermost?

[alex_gray255]

Sounds like the cover is not as breathable as they claim.

I leave mine under the cover almost all of winter and don't have a problem.

Also, a good addition would be a humidifier in the car as well. I did not do this with my first TVR over its first winter storage and ended up having mould on the interior - a Tuscan. Added a dehumifier, not a problem since.

[Monsterlime]

Thanks all. I shall see what I have at home that might be suitable, I'm sure I have something that would fit.

I haven't noticed anything in the cabin so far, but I assume I would need to plug the dehumidifier in?

[alex_gray255]

Nah, just buy a standalone pack that absorbs water from Halfords. Refills cost about 3-4 quid.

Bell Moisture Mate Cat code: 248849-0