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Windscreen Condensation

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Windscreen Condensation

Postby ian-81 » Thu Jan 10, 2019 9:57 pm

Our motorhome based on a transit gets a lot of condensation on the inside of the screen overnight when we are sleeping in her.

If I use a squegee to scrape the water off I wonder where it would drain too? If there is a drain from the screen where is it?

I ask because the foor mat underside on the drivers side is getting wet.

Thanks
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Re: Windscreen Condensation

Postby jonochap » Fri Jan 11, 2019 12:05 am

Hi Ian, there probably wouldn’t be an internal drain. Windscreen covers work well but inside or outside make a difference maybe you need to vent the van a bit more when you’re in there. The manual container type dehumidifiers that you get in supermarkets are really helpful


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Re: Windscreen Condensation

Postby fisherman99 » Fri Jan 11, 2019 12:19 am

Get a window vac Brill piece of kit and surprisingly how much water they remove or outside thermal s screen I have a sst for my mk6 but when it's raining when you park up it's a pain to put on and store when wet so that's why I got a window vac
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Re: Windscreen Condensation

Postby pippin » Sat Jan 12, 2019 6:25 pm

We have a motorhome too.

The condensation on the windscreen is horrendous, despite running a couple of fans all the time.
One blows fresh air in, the other sucks the not so fresher air out.

We have a Karcher window vac which is brilliant for the top area of the screen.
Unfortunately the angle doesn't allow it to dry the lower quarter of the screen.

What we do now is use towelling in a long thin sausage all the way along where the glass meets the dash.
Right annoying if we forget to do it before going to bed.

We do have external screens that solve the problem but it's too much of a faff in the cold and wet.

Brilliant for use in southern €U to keep the sun out tho'!!
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Re: Windscreen Condensation

Postby dumper » Sat Jan 12, 2019 7:35 pm

I also use a window vac but had no problem with the bottom of the screen use it on its side with the large suction blade bet you have to empty it a lot more as running on it’s side it tends to leek a bit
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Re: Windscreen Condensation

Postby EJB » Sat Jan 12, 2019 8:19 pm

External windscreen insulated covers stop virtually all condensation!
Understand the window vacs are good...but never had a need for one :wink:
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Re: Windscreen Condensation

Postby fisherman99 » Sat Jan 12, 2019 11:22 pm

External would be the best option if you didn't have to store them wet and fitting and removing the in the rain and wind also a pain I read a post on hear that it was possible to also fit then on the inside instead I fitted pop studs so I could the fit them on the inside after that I always fit them inside but that still gives you condensation
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Re: Windscreen Condensation

Postby Azer van man » Mon Jan 14, 2019 10:21 pm

I’d say the heating system your using is causing it,I have an Eberspacher and never have a problem with condensation thankfully.
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Re: Windscreen Condensation

Postby dumper » Mon Jan 14, 2019 10:52 pm

I never use the Eberspacher to sleep all the night all the vans I’ve built have been well insulated and good sleeping bags I’ve been ok I use it when parked up drinking ice cold beer :D
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Re: Windscreen Condensation

Postby Azer van man » Mon Jan 14, 2019 11:43 pm

dumper wrote:I never use the Eberspacher to sleep all the night all the vans I’ve built have been well insulated and good sleeping bags I’ve been ok I use it when parked up drinking ice cold beer :D

When it’s -16 Mate I have mine on all night :P :P
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Re: Windscreen Condensation

Postby dumper » Tue Jan 15, 2019 1:39 am

Azer van man wrote:
dumper wrote:I never use the Eberspacher to sleep all the night all the vans I’ve built have been well insulated and good sleeping bags I’ve been ok I use it when parked up drinking ice cold beer :D

When it’s -16 Mate I have mine on all night :P :P

No need for a coolbox for the beer then :D
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Re: Windscreen Condensation

Postby bigjohnthomas » Tue Jan 15, 2019 9:38 am

If you take a severed human head out of the fridge the same thing will happen to that
It's to do with the glass being at a different temperature to the warm air in your van and atmospheric pressure and dew point n shit
When the air meets the glass it cools and as we all know cooler air dosent hold as much moisture than warm air
Bish bosh wet window same as an uninsulated van roof
Now then
Now then whacha gotta do if you insist on sleeping in a farty old van like a tramp that hasn't had a wash for a week
is insulated it as good old ejb retorts
How's about that then ?
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