motorhome damp levels

Discussion in 'Motorhome Chat' started by froggy59, Dec 2, 2013.

  1. froggy59

    froggy59

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    We have a 2010 burstner nexxo t660, I have been keeping my eye on a small damp stain inside one of the cupboards below the roof joint.
    I have just used a small digital damp meter and it gave a reading of 28 but it is only in a small patch, does anyone know what the reading are for a motor home as I know they can get condensation in them-also I have a couple of disposable dehumidifiers and they are dry and as new and don't appear to be drawing any damp.

    Alan
     
  2. golly

    golly Funster

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    When I had my last habitation check, the chart said anything over 15 indicated significant damp needing investigation :Sad: Hope I'm wrong, but I would get it checked out at your dealers.
     
  3. buttons

    buttons Funster

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    Not an expert but in this link it says that wood with 28% reading is saturated. Have a read see if it can help. The area of damp would make me suspicious high on the wall could be the roof seal.
    http://www.dampness-info.co.uk/meters.htm
     
  4. motorhomelover

    motorhomelover Banned

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    Acceptable damp in a motorhome = Nill
    NARDA zilch
    None
    Nothing

    What to do

    Panic. It's an expensive fix :cry::cry:
    DO NOT PUT IT OFF

    Get it looked at now !!!!!
     
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  5. schojac

    schojac

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    Hi,

    depends on the meter. I have a cheapie off ebay and the way I approach using the meter is to take readings over a period of time. Self calibration you might say. I use the same points every time leaving 4 small puncture marks so I can find next time.

    I average, with my meter, <15% in the summer up to my recorded max of 20% during the winter. No internal heating; this is cold storage for want of a better phrase.
    I would start to investigate if it went above 22/23%. Therefore, using my meter, I would suspect a leak somewhere.

    I once had a reading of 30% under a sliding window and after checking put it down to my careless use of the power washer.
     
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  6. Mel

    Mel Funster

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    I dont think there should be any damp in a 2010 motorhome.
    I whould contact the dealer without delay.

    Mel
     
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  7. Cyclewalkbob

    Cyclewalkbob Funster

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    I bought my Nexxo T660 from Southdowns, they use readings

    0-5 fine, 5-15 acceptable, 15-20 attention -damp but minimal, 21-60 Action,
    R-rotten

    My gas locker door internals are going to be replaced under warranty.

    How old is the van? It should have a 5 year water ingress guarantee providing you have had an annual damp test by a Burstner dealer.

    Is it near where you TV Ariel is? Mine is in the wardrobe and the high level kitchen cupboards are next to the wardrobe, it might be that the arial needs revealing.

    Let me know how you get on

    Cheers

    Bob
     
  8. rolandrat

    rolandrat

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    Another neglected area is the heater flue pipe seal on the roof it can crack and cause water ingress.
     
  9. hilldweller

    hilldweller Funster Life Member

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    To dry a section I found damp I opened up the area and had a fan heater on low blowing on it for 3 weeks.

    Once it's in it travels a long way and it's hell to get out.

    You can see some of the damp, what about the water running the other way.

    Sorry to lay it on but you need to do something pronto.
     
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  10. schojac

    schojac

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    There will always be some dampness (humidity) in any motorhome. This is why I get a higher reading during the winter months; it's just cold and damp out there.

    Summer can be as low as 10% (with my meter which I use to compare readings)
     
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  11. Wildman

    Wildman

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    All materials have a different resistance so when looking at possible damp compare like with like at different points in the van. It does seem rather high, but don't panic now Mr Mainwaring Sir. Light a fire in the middle of the van and let the insurance cure it:ROFLMAO::ROFLMAO::ROFLMAO::ROFLMAO::ROFLMAO::ROFLMAO::ROFLMAO:
     
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  12. Moodybrook

    Moodybrook Funster

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    I followed a lead about a "miracle cure" Google - Captain Tolley Looks a goodun but other more experienced lads on this site, good luck !
     
  13. Moodybrook

    Moodybrook Funster

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    There is a demo video of Captain Tolley on Youtube.
     
  14. jonandshell

    jonandshell Funster

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    A dampmeter is for investigating hidden problems.

    If you can see a wet patch, you have a LEAK!!!!!!!!!

    Get on the roof and check all sealant beads, trim, etc.

    Common sense applies here. If a seal looks dodgy, then it probably is! I have had instances in the past where a dealer has ignored a crap, split bead of sealant just because the damp meter said there was no problem. The damp test was done in May. By November, 5 boards inside needed replacement!
    The work was done under warranty (badly), I still needed to reseal the roof because they STILL hadn't sorted the sealant!
    Anyway, we shifted that van for our new one!
    As a result we trust NOBODY to look after our newest pride and joy. I damp test randomly every month or two.:thumb:
     
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  15. MikeD

    MikeD Funster

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    The highest reading at my last hab check was 12 :thumb::thumb:

    Your number appears to be a bit high:Eeek::Eeek:
     
  16. Reallyretired

    Reallyretired Funster

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    I've just checked a few things round the house to get an idea of what the range might be.

    In the garage (no leaks but ambient temperature, dampish air as it's raining) a couple of softwood samples (worktop and stool) were 18%

    In the house with central heating, softwood (doorframe) was 2%, Oak (door) was 0%, presumably this is as dry as it can be.

    Working on that basis, at this time of year with the wet weather we are having, softwood could be as high as 20% without indicating a problem if there has been no heating for a while. Far lower in warmer weather though or if there was heating on.

    Meters may vary though, mine gives a reading of 35% for skin on my arm.
     
  17. Ed Excel

    Ed Excel Funster

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    Are you putting any heat into the space? To get the moisture to rise out of your Motorhome contents and settle in a dehumidifier, in any appreciable amounts, you need to warm the air.
     
  18. jezport

    jezport Funster

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    Damp on a surface due to condensation can be confused with damp in the wood.
     
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