Damp roof inside?
Anyone know why a roof whould be very very damp inside? and mould?
Thank
Steve
I guess they all go slightly porous in the end - mine certainly is - after prolonged rain you can see the damp coming through - particularly the section over the side windows. This is with “religious” vinyl treatment (Autoglym Bumper Care) which does its best to waterproof the roof.
Plus could be blocked drains covered extensively elsewhere on this forum !
Steve
Condensation due to the extreme weather we have had. Mine had ice on the inside but then it also had 8 inches of snow on top>!
I have now put a dehumidifier in it, as I’m fed up with drying it out and wiping off the mould.
Same - experimenting with cat litter in a cheap sandwich box (with holes drilled in the lid) on the shelf under the rear window!
Has seemed to help, and now use the demister button a lot less.
I suspect a proper dehumidifier box would work better however.
Steve
Good answer probably the best one so far, certainly seems totally plausible
and since there was no mould when i bought it, looks totally correct.<o:p></o:p>
Thanks<o:p></o:p>
<o:p> </o:p>
~Steve
There seems to be a little crap at the start, not my doing.
Were you talking about the cat litter?? 
Cat litter
dont mention it to my dogs they will rip the roof of 
but i hope you solve the problem of dampness
My local Halfords have dehumidifiers reduced to £2.99. Supposed to do caravans and stuff so should do well in a 5 cabin… Bargain I reckon, in fact the crystal refill packs were same cost as new box and crystals… Only put in at weekend and not been in car since so can’t report on success…
I would check very carefully the condition of the drains, rain rail, check under the deck carpet, door seals etc. I’d be surprised that a factory vinyl roof would be becoming porous.
Wearing my professional hat, mould requires warm, humid conditions; the roof lining, afer many years, becomes coated in an oily substance (skin, smoke stains etc), providing a good substrate for mould and fungi. Sitting in the car, with the heater running, provides a great environment. The tendancy for most people is to try and wipe it off, but you usually end up just reinnoculating other parts of the roof. I’d recommend making up a 0-5-1% v/v bleach solution, and carefully dabbing, let it sit for 20 minutes, clean off with fresh water, and monitor it. 1% dilution wouldn’t wreck the lining, stronger solutions might. The anti-mould sprays are better used as a preventer, once you have sorted out the original issue.
Although the door seals etc might not seem to be leaking, have a good look by lifting the carpet; the deck carpet is particularly problematic, as there is a damp-proof membrane; the carpet can feel dry to touch, but water is running under the membrane. The insulating materaial becomes sodden, and holds moisture. In extreme cases, the non-painted part of the shelf literally rusts away. If the roof drains are damaged, or detached, the area behind the seats becomes wet. Up front, the front seals can dribble down the a-piller. Also, under the footwell carpet, there is another damp proof membrane. On the drivers side, this becomes cracked. Wet shoes wet the carpet, water goes through the membrane, and again causes a insulating layer to become a sodden mess. There are also some taped over holes (used for the loom on lhd cars); if the tape has come off/is missing, moisture can get in, and it might not be immediately apparent.
Ill pop in
AT,
Thanks for the very imformitive info, ill check . Thanks so very very much.
Steve (Coleco) etc
I have the same problem got myself a cheap car cover from ebay easy to put on and take off no problem with the snow it just sat on the top
AT - Thanks a lot 
I also noticed your siggy is wrong, it says your a forum member from 98 to 2009? its 2010 now and your still posting 
hehe. On a serious note I have exactly the same problem with a mouldy liner inside - my car also smells a bit damp when you get in it gulp So I think this weekend (as long as the weather stays off) could well be spent taking my interior apart xD
Now replaced cat litter with dehumidifyer from Halfords.
Will report back in time.
Steve
Mine will have been in the car a week tomorow, and car has not moved so I’m quite excited to see if there is any water in it when I look tomorrow… Mind you, the cars got snow on it again now…!!!
Annnnnnd our survey says? 
Just a thought, but isn’t the design of the roof at fault as water is channelled into the car then into the drains. This will surely produce dampness within the cockpit to some extent, even if the drains are clear.
On most convertibles I have seen, the roof overlaps the bodywork so that water just runs off. Not quite as neat visually but must be better.
I tried a dehumidifier and after a weekI went backto the car…The rear plastic window was soaking and the dehumidifier was bone dry!!! Got salt on a tray now and a cover over the car so I will see how that gets on
Hi all
I’ve had a quick read of all the posts regarding mould on the inside of the roof however I’m a little confused 
My lid became saturated during the very wet snow we had last year and droplets of water formed all over the interior not just around the edges adjacent to the windows etc which is where the mould has developed. The lid has never and still doesn’t leak.
AT - I’m not good with dilutions. Is it possible for you to give me a simpler measurement of bleach to water please and I’ll have a go at cleaning mine?
Any and all advice welcome.