Condensation any Ideas how?

Discussion in 'Motorhome Chat' started by Serendipitous, Dec 6, 2015.

  1. Serendipitous

    Serendipitous Funster

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    Noticed a couple of times that the ends of the bed sheet are damp and the van wall is wet, presumably due to condensation at the head end of the mattress. We have a Kontiki 679 with a transverse bed over the garage. The is the standard gapping board on the rear wall but nothing at the head and foot of the mattress.

    Having to lift the mattress to ventilate and dry is a pain.


    Did wonder about cutting a couple of pieces of poly carbonate roofing sheet and sliding those between mattress & wall. (hollow in middle)


    Any thoughts on a cure?
     
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  2. jenny and mitch

    jenny and mitch Funster

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    Sounds worth a try with your polyC sheet.
     
  3. irnbru

    irnbru Funster Life Member

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    Drill a tiny hole and fill the gap with expanding foam. I bought an endoscope from ebay and was able to see just where the insulation failed.
     
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  4. Serendipitous

    Serendipitous Funster

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    The damp is virtually all across the head end of the mattress. Assume it's mainly that end due to the moisture in breathing.

    Sue is adamant that she can't manage without breathing.
     
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  5. funflair

    funflair Funster Life Member

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    Do you have a window open at night?

    Martin
     
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  6. irnbru

    irnbru Funster Life Member

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    It will definitely be condensation. Sounds familiar to ours
     
  7. Minxy Girl

    Minxy Girl Funster Life Member

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    As a temporary measure try some bubble wrap ... cut a piece for each end of the bed so that the mattress doesn't touch the wall ... not over Sue's head! :xgrin:
     
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  8. Cinderz

    Cinderz Funster

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    We have similar and I tried some foil backed insulation used for behind radiators - didn't work! Remembered this being discussed previously and managed to find 1 thread where the solution suggested was car carpet glued to the walls with spray glue. I'm going to try this but hubby won't let me glue it (thinks it might get fousty) going to place it round the walls and see how it goes. Can't find the link for the supplier just now but I'm sure it'll be easy to find. Think the thread was from 2010 but I know I've read more than 1 or 2
    edit to include link
    .http://www.motorhomefun.co.uk/forum/threads/damp-mattress-in-autotrail.20635/#post-251292
     
    Last edited: Dec 6, 2015
  9. pappajohn

    pappajohn Funster Life Member

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    You need an air gap the same as the rear wall, not insulation.
    Placing insulation will cause condensation between the insulation and wall.
    The mattress will be dry at the expense of the wall board.

    Circulation is the best way to control condensation.
     
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  10. GJH

    GJH Funster Life Member

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    In our Autoquest we suffered similar condensation in very cold weather. We used a couple of those car windscreen sunshades sold for leaving in place when the car is parked. Something like This.
     
  11. Serendipitous

    Serendipitous Funster

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    Thanks to all, plan to try the bubble wrap (Sue says thanks to MinxyGirl for making it clear where the bubble wrap goes> and the polycarbonate roof sheet. Let you know if any better after the next trip out in January.

    GJH, do the window blinds work?

    Funfair, With respect to windows open or not doesn't make much difference as the mattress touches the side wall so no ventilation. Only occurs in cold weather.

    Cinderz, thanks for the link. Have a readof that later.

    Papajohn, agreed the old adage of heat and ventilate would cure but alas. Seems a bit stupid for the sake of a couple of inches in mattress length not to put space boards in each end!

    Any further suggestions welcome, catch up tomorrow. Glass of red in hand.

    Cheers
     
  12. Lenny HB

    Lenny HB Funster

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    Are you getting cold spots from the garage below if so could be worth putting additional heating outlets in the garage.
     
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  13. funflair

    funflair Funster Life Member

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    Open windows takes the moist air that you are expelling out instead of condensing (apologies if you knew this), are you saying its coming from the mattress and then causing damp where it is trying to escape against the cold side wall, there should be general ventilation from under the mattress.

    Martin
     
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  14. GJH

    GJH Funster Life Member

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    It stopped the bedding getting wet but you do have to check and ensure any condensation on the wall is wiped up. It was such an infrequent event for us that it was sufficient.
     
  15. Lynne Steele

    Lynne Steele Funster

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    We have the same problem, after funsters advice we insulted the large garage door which had less insulation than walls, put draught excluder round garage door, and I also leave open the access doors to garage from interior of the van, if we are on hook up I use electric fan heater to warm the space under the bed as we have no heating in our garage, I am also worried about the mattress and think if it was not touching the walls the problem would stop, but that would mean having a new mattress made, quite expensive, but if all else fails may be our only answer.

    Lynne
     
  16. PhilandMena

    PhilandMena Funster

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    Martin has nailed it. Ventilation required.
     
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  17. DP_JAY

    DP_JAY Funster Life Member

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    Agree with the above re ventilation. 2 Questions, what is under the mattress? & is there any heating in the garage area? If there is no heating in the garage & it is not easy to connect into the blown air, try leaving the interconnecting door/flap open or take it off, I've replaced ours with a piece of sliding steel mesh from a dog cage.
    If the mattress rests on a flat surface instead of slats, put some very course foam sheet( as used in pond filters) underneath.
     
  18. Langtoftlad

    Langtoftlad Funster Life Member

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    Ventilation :xThumb:
    "a person loses about 800ml of water per day, half through the skin and half through respiration."
    Thus 2 of you are 'creating' about half a litre of water during a night's sleep - that's quite a wet patch :xrofl:
     
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  19. jdk62

    jdk62 Funster

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    dampness or incontinence?
     
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  20. PhilandMena

    PhilandMena Funster

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