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Condensation in cargo area

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Condensation in cargo area

Postby woodbutcherbower » Mon Dec 02, 2019 4:42 pm

Morning all,

I seem to have a recurring problem with the ceiling of the van's cargo area being constantly covered with condensation - like dripping wet. I don't work in one of the wet trades, so the rear isn't constantly full of wet plastering buckets or anything similar. The van has folding roof bars, and although these were a factory fit, I've taken them off just to check the seals on the bolt holes. All's fine. Anyone else get this? Is it just the time of year? Any other ideas?

Thanks in advance, all the best.
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Re: Condensation in cargo area

Postby dumper » Mon Dec 02, 2019 7:20 pm

common fault this time of year try ply lining the roof put some insulation under it
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Re: Condensation in cargo area

Postby Mike » Mon Dec 02, 2019 8:32 pm

My MK6 didn't have aircon, so I had a Flettner fitted, condensation problem solved and trades don't get much wetter than mine.

All my vans since then have had aircon so that deals with the condensation as long as you leave it on all the time.
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Re: Condensation in cargo area

Postby woodbutcherbower » Mon Dec 02, 2019 8:42 pm

dumper wrote:common fault this time of year try ply lining the roof put some insulation under it


Cheers mate, but that's not an option for me - my racking runs from floor to ceiling, and I've got brackets for sash cramps and a long tray for plunge saw rails all bolted to the ceiling crossmembers to give me more room for other kit in the racking and on the floor - I'd have to rip the lot out to insulate and line the ceiling. It's encouraging to know that I'm not the only one who gets this though - and that's really all I wanted to know. Best get some more tissue paper rolls ordered for the mop-ups ahead.

Thanks very much for the reply.

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Re: Condensation in cargo area

Postby woodbutcherbower » Mon Dec 02, 2019 9:02 pm

Mike wrote:My MK6 didn't have aircon, so I had a Flettner fitted, condensation problem solved and trades don't get much wetter than mine.

All my vans since then have had aircon so that deals with the condensation as long as you leave it on all the time.


Cheers for the reply Mike. Will the aircon being on in the cab still dry the air enough to get rid of the moisture in the back? How does the moisture from the cargo area get past the bulkhead? A Flettner might be just the answer though. I'll try aircon permanently on first.

Thanks again.
Last edited by woodbutcherbower on Mon Dec 02, 2019 9:10 pm, edited 1 time in total.
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Re: Condensation in cargo area

Postby Mike » Mon Dec 02, 2019 9:06 pm

woodbutcherbower wrote:
Mike wrote:My MK6 didn't have aircon, so I had a Flettner fitted, condensation problem solved and trades don't get much wetter than mine.

All my vans since then have had aircon so that deals with the condensation as long as you leave it on all the time.


Cheers for the reply Mike. Will the aircon being on in the cab still dry the air enough to get rid of the moisture in the cab? How does the moisture from the back get past the bulkhead? Ta in advance.

The bulkhead is vented in the lower section.
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Re: Condensation in cargo area

Postby woodbutcherbower » Mon Dec 02, 2019 9:11 pm

Doh. Of course it is. Thanks very much. Yellow light on permanently as from tomorrow.

All the best.
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Re: Condensation in cargo area

Postby caddy1210@ » Mon Dec 02, 2019 10:43 pm

You need a dehumidifier mate, I have about 8 in my van and they keep the windscreen dry in the morning as well.
Always bone dry in the back of mine. Asda is a good place that I got all of mine from, one is the size of a football meant for large rooms but is brilliant and was only £6
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Re: Condensation in cargo area

Postby woodbutcherbower » Mon Dec 02, 2019 11:01 pm

caddy1210@ wrote:You need a dehumidifier mate, I have about 8 in my van and they keep the windscreen dry in the morning as well.
Always bone dry in the back of mine. Asda is a good place that I got all of mine from, one is the size of a football meant for large rooms but is brilliant and was only £6


Cheers mate. I have an Asda just down the road. Failing that, I'll take a walk down Ebay lane. Cheers again.
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Re: Condensation in cargo area

Postby S60r » Tue Dec 03, 2019 7:41 am

As a fellow butcher of wood, firstly congratulations on a beautifully organised cargo area and your choice of toolage.


My previous custom had the pop up roof bars and they continually leaked. I would have to re seal them every 3/4 months or the water would pour in. Usually just running around the thread of the 8mm bolts.

Yes they do suffer from condensation at this time of year but I would remove your bolts and seal them with a decent epdm sealant. Mastic did work but will dry out, the tiger seal or something similar (used for mounting body panels similar to the spoilers etc) works very well.


Add some paper as a ‘tell tale” just below the bolts in the cargo area and see if yours leak.... my paper was saturated after any wet weather until I re-sealed.
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Re: Condensation in cargo area

Postby woodbutcherbower » Tue Dec 03, 2019 7:23 pm

S60r wrote:As a fellow butcher of wood, firstly congratulations on a beautifully organised cargo area and your choice of toolage.

Yes they do suffer from condensation at this time of year but I would remove your bolts and seal them with a decent epdm sealant. Mastic did work but will dry out, the tiger seal or something similar (used for mounting body panels similar to the spoilers etc) works very well.


Thanks for the kind words 8) I've got a cartridge of Tigerseal left over from when I put my roof spoiler on, I'll take you up on your suggestion just for belt & braces. I'll sign off with some more racking and toolage porn. All the best.

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Re: Condensation in cargo area

Postby John webbo » Wed Dec 04, 2019 1:47 pm

That is an impressive van fit 8)
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Re: Condensation in cargo area

Postby seagypsy1407u » Wed Dec 04, 2019 4:48 pm

You could try some of this, i put this on all the panels i could access easily plenty on eBay

Silent Coat 2mm Sound Deadening Damping Mat -187 x 250mm

With military grade construction and highly effective damping, Silent Coat Damping Mat is already the first sound deadening choice of many automotive professionals.

Silent Coat 2mm Damping Mat uses constrained layer damping to lower panel resonance and absorb structural vibrations. Stop those nasty rattles, eliminate road and outside noise, insulate your vehicle and dramatically improve the sound of your car interior.

Technical advantages:

Self adhesive 2mm butyl based rubber visco elastic polymer active layer
Aluminium constraining layer for maximum noise reduction improves performance
Highly efficient vibration damper
Superior performance to comparable products
Contains 30% more active material than the Dynamic sounding brand leader
Highly efficient performance requires less product
More economical in use compared to competitors

Product features:

Soft and easy to use
No nasty smell unlike inferior bitumen products
Military grade adhesive stays stuck even in extreme temperatures
Non flammable
Professional butyl based construction
Unbeatable cost to performance ratio
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Re: Condensation in cargo area

Postby Mike » Wed Dec 04, 2019 6:28 pm

I hope that van is somewhere secure overnight :shock:
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Re: Condensation in cargo area

Postby woodbutcherbower » Thu Dec 05, 2019 4:11 pm

seagypsy1407u wrote:You could try some of this, i put this on all the panels i could access easily plenty on eBay

Silent Coat 2mm Sound Deadening Damping Mat -187 x 250mm



That's brilliant, I'll give it a go if 'permanent aircon on' doesn't fix it. Thanks for the suggestion.
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